DICTIONARY OF AUTOMOTIVE TERMS - "Ma"

M+S:

Acronym for "mud and snow," as in M+S tire. A tire with a tread design which gives the maximum traction in mud and snow.

M+S tire:

Acronym for "mud and snow tire," as in M+S tire. A tire with a tread design which gives the maximum traction in mud and snow.

MAC:

Acronym for "motor assisted bicycle" -- usually an electric motor

Machine:

See:
injection molding machine
milling machine
perpetual motion machine
wheel balancing machine
wheeling machine

Machined surface:

A smooth surface of metal such as the top of a cylinder block.

Machine room:

Area where commercial and industrial refrigeration machinery -- except evaporators -- is located.

Machinery spaces:

See:
unmanned machinery spaces

Machine screw:

A screw with thread running the length of the shank and available with a variety of different heads

Machining:

An operation which shapes metal parts by carving away excess material as chips produced in a sequential process of turning, milling and grinding operations.

Machinists' caliper:

A measuring tool with two curved arms for inside or outside measurement; the reading taken with the arms is transferred to a steel rule or micrometer to attain the exact value

Machinists' hammer:

A ball pien hammer

MacPherson strut:

A suspension piece which employs a coil spring and shock absorber attached to the lower A-arms and the top of the front body structure. Originally it had a lateral link with an anti-roll bar instead of the lower A-arm. It was first invented by a Ford of England engineer, Earle S. MacPherson.

MacPherson strut tower:

A sheet metal panel surrounding the upper mount of the MacPherson strut at the side panels of the engine compartment; it may be a separate panel fitted by spot-welding or a deep-drawn section of the side panel shaped to take the upper strut end. Also called "suspension leg turret"

MacPherson suspension:

A suspension layout incorporating macpherson struts

Macromolecule:

Any very large molecule, such as a synthetic polymer used in the manufacture of plastic

Macromolecular:

With very large molecules

MAF:

Acronym for mass airflow

MAFTS:

Acronym for "manifold air/fuel temperature sensor"

MAG:

Swiss engine makers, the initials stand for Motosacoche Acacias Geneva. The company also produced complete Motosacoche motorcycles

Mag:

1. Abbreviation for "magneto."
2. Abbreviation for "magnesium,"mag wheels."

Also See:
mags

Mag alloy:

Magnesium alloy, a strong lightweight metal used for many components, particularly wheels

Magnaflux:

A special chemical process, used to check parts for cracks.

Magnesium wheel:

An alloy wheel. See mag wheel

Magnet:

1. A piece of magnetized steel that will attract all ferrous material. The permanent magnet does not need electricity to function and will retain its magnetism over a period of years. Often shaped into the letter "U."
2. The part of the electric actuating mechanism, which when energized is attracted to the armature, creating a controlled force to apply the brake(s).

Also See:
alnico magnet
permanent magnet

Magnetically controlled electronic ignition:

See electronic ignition system.

Magnetic clutch:

1. A coupling device used to turn the compressor off and on electrically.
2. Clutch built into automobile compressor flywheel. operated magnetically. which allows pulley to revolve without driving compressor when refrigerating effect is not required.

Also See:
electromagnetic clutch

Magnetic core:

Magnetic center of a magnetic field.

Magnetic drain plug:

A plug or bolt fitted in the sump or oil pan to collect metal filings

Magnetic field:

The area encompassed by the magnetic lines of force surrounding either a bar magnet or electromagnet. The flow of magnetic force between the opposite poles of a magnet.
Also See:
field
primary magnetic field

Magnetic flux:

Lines of force of a magnet.

Magnetic gasket:

Door-sealing material which keeps door tightly closed with small magnets inserted in gasket.

Magnetic north pole:

End of magnet Out of which magnetic lines of force flow.

Magnetic pick-up:

1. A pulse generator consisting of a stator with a permanent magnet and a rotor, which induces an AC voltage in the inductive winding by the periodic change of the air gap between stator and rotor. Magnetic pick-ups attached to the distributor for ignition triggering have as many teeth on the pole piece (stator) and on the trigger wheel (rotor) as the engine has cylinders. Some magnetic pick-ups have a bowl-like rotor with ferrite rods inserted in the walls. Magnetic pick-ups on the crankshaft flywheel act as reference mark sensors.
2. A tool with flexible or rigid shaft and magnetic tip used to retrieve dropped nuts, bolts, and other metal parts from hard-to-reach places.

Also See:
pick-up tool
transistorized ignition with magnetic pick-up

Magnetic pick-up assembly:

A pulse generator consisting of a stator with a permanent magnet and a rotor, which induces an AC voltage in the inductive winding by the periodic change of the air gap between stator and rotor. Magnetic pick-ups attached to the distributor for ignition triggering have as many teeth on the pole piece (stator) and on the trigger wheel (rotor) as the engine has cylinders. Some magnetic pick-ups have a bowl-like rotor with ferrite rods inserted in the walls. Magnetic pick-ups on the crankshaft flywheel act as reference mark sensors

Magnetic pick-up tool:

A tool with flexible or rigid shaft and magnetic tip used to retrieve dropped nuts, bolts, and other metal parts from hard-to-reach places.
Also See:
pick-up tool

Magnetic plug:

A plug or bolt fitted in the sump or oil pan to collect metal filings

Magnetic screwdriver:

1. A screwdriver with a magnetized shank.
2. A screwdriver tool with hexagon socket end to accept and operate hex bits and hold them securely by magnetism. Some also have a hollow handle for storing the bits

Magnetic south pole:

The part of a magnet into which magnetic flux lines flow.

Magnetism:

A field of force which causes a magnet to attract materials made of iron, nickel-cobalt or other ferrous material.

Magnetized:

Made magnetic

Magneto:

An electrical device which generates electrical current when it is rotated by an outside source of power. It needs no outside source of power such as a battery. It may produce either low or high tension current.
Also See:
flywheel magneto

Magneto file:

A tool for filing ignition points and other small objects

Magneto ignition:

A compact assembly of a magneto generator, an ignition coil, and a distributor. Ignition voltage is induced within the magneto by the movement of a coil relative to the poles of a permanent magnet. Because it needs no battery, the system is particularly suited for small engines, e.g., motorcycles, outboard engines, etc.

Magneto puller:

A tool which screws into the center of the magneto to force the magneto away from the shaft on which it rides.

Magnet sensor:

See Hall vane switch

Mags:

See mag wheel.

Mag wheel:

Lightweight, sporty wheels made of magnesium. The term mag is often applied to aluminum and aluminum and steel combination wheels.
Also See:
alloy wheels

Main bar:

The bar on a convertible top which carries the main load when the top is raised and taut, and defines the hinge point for the folding motion. Also called "main bow"

Main beam:

British term for high beam

Main beam indicator:

British term for high beam indicator

Main bearings:

The bearings in the engine block that support the crankshaft.

Main bearings:

See main bearing

Main bearing support:

See main bearing supports.

Main bearing supports:

A steel plate that is installed over the main bearing caps to increase their strength for racing purposes.

Main bow:

The bar on a convertible top which carries the main load when the top is raised and taut, and defines the hinge point for the folding motion. Also called "main bar"

Main combustion chamber:

With diesel engines, the fuel may be injected in three different locations: in the prechamber, the swirl chamber, or the main combustion chamber (for direct injection engines), depending on the process used

Main deck:

The continuous deck of a ship running from fore to aft. The freeboard is measured from this deck.

Main jet:

The primary, large fuel orifice in a carburetor through which most of the fuel flows.

Mainline pressure:

See line pressure

Main member:

The primary chassis rail

Main metering circuit:

The cruising circuit or the high speed circuit. It supplies the correct air/fuel mixture to the engine during cruising and high-speed conditions. Also called main metering system

Main mixing well:

Main well main nozzle: Main delivery tube

Main mixture discharge nozzle:

The jet through which the gasoline and air is fed into the carburetor barrel where it becomes the air/fuel mixture

Main petal:

The primary petal of a dual-stage reed valve. The opposite is subsidiary petal. In dual-stage reed valves, the subsidiary petal opens first

Main pressure:

See line pressure

Main regulating system:

The carburetor components are divided into the fuel intake control, the main regulating system, the idle system, and the staring aids. The main regulating system includes the main jet, jet needle, needle jet, and throttle valve, whose purpose it is to provide an appropriate amount of fuel and air to the carburetor

Mains:

See four bolt mains

Main shaft:

The transmission output shaft

Main sun visor:

In dual visor systems, the main visor is moved sideways and the secondary visor is flipped down, thus shielding the driver from the sun from both the front and side

Maintenance:

The work undertaken by a car owner to keep his vehicle in good working order; typically checking the tires, lights, oil and coolant levels, windscreen wipers, and seat belts. Compare service

Maintenance-free:

Something that requiring no work in order to be kept operational

Maintenance-free battery:

A battery with a permanently sealed top, thus requiring no topping-up

Maintenance manual:

A book of instructions detailing routine maintenance

Main triangle:

See front triangle.

Main venturi:

Large venturi cast into the carburetor main body

Main well:

The reservoir in which fuel for the main system is stored. The main well is located in the main body casting. It is connected to the venturi area by the discharge nozzle

Main-well tube:

A perforated tube which extends from an air bleed in the top of the air horn down into the main well. Admits air from the air bleed into the main well to emulsify the fuel in the main well. Improves idle response and stability when the engine is hot and prevents fuel percolation and general hot-starting problems. Also improves response in the main metering circuit during part throttle conditions. Also called emulsion tube

Major diameter:

On a bolt or screw, the diameter measured from the crest of a thread to the corresponding crest on the opposite side of the bolt or screw

Make:

Brand name of a car or truck (i.e., Chevrolet, Ford, Dodge, Honda).

Male end:

A plug, pin, or protrusion which fits into a receptacle (female end).

Make the trip?:

Trucker slang for Is transmission being received as in "Did my signal make the trip?"

Male thread:

Something with external threads like a bolt or screw. Female threads are found in nuts.

Malfunction:

Problem in system that affects normal operation

Malfunction indicator light:

(MIL) an electric circuit between the computer and the "check engine" or "service engine soon" light on the dash panel of a computer equipped vehicle

Malleable castings:

1. Cast forms of metal which have been heat-treated to reduce their brittleness.
2. A casting which has been toughened by annealing

Mallet:

See:
bossing mallet
rubber mallet
wood mallet

Man:

Short form for manual transmission

Management system:

See engine management system

Mandrel:

A round shaft used to mount a stone, cutter, saw, etc.

Maneuver:

To drive or steer a vehicle around obstacles or in a confined space

Maneuverability:

The ease with which a vehicle can be steered around objects

Manganese:

See methylcyclopentadienyl Manganese Tricarbonyl

Manganese bronze:

An alloy of copper, zinc, and manganese

Manganese phosphate coating:

A phosphate coating with added manganese to increase resistance to wear and fatigue

Manganese Tricarbonyl:

See methylcyclopentadienyl Manganese Tricarbonyl

Manhattan:

See Frazer.

Manifold:

1. A pipe or number of pipes connecting a series of holes or outlets to a common opening.
2. A device which controls refrigerant flow for system test purposes by means of hand valves which can open or close various passageways connected together inside the manifold. Used in conjunction with manifold gauges and service hoses

Also See:
air injection manifold
exhaust manifold
high-rise manifold
induction manifold
inlet manifold
intake manifold heater
intake manifold
log manifold
ram intake manifold
split manifold
variable intake manifold

Manifold absolute pressure:

(MAP) manifold pressure measured on the absolute pressure scale, an indication of engine load. At sea level, MAP = 1 bar (14.5 psi)

Manifold absolute pressure sensor: (MAP)

1. A sensor which monitors the engine's intake manifold pressure and transmits the data to the engine controller. A pressure-sensitive disk capacitor used to measure air pressure inside the intake manifold. The Map sensor sends a signal to the computer which uses this information to determine load conditions so it can adjust spark timing and fuel mixture. Also called manifold pressure sensor or pressure differential sensor
2. A sensor that measures absolute air pressure in the intake manifold.

Manifold air temperature sensor:

(MAT sensor) sensor that monitors the temperature of the air entering the intake manifold

Manifold charge temperature sensor:

(MCT) same as the air charge temperature sensor (ACT)

Manifold control valve:

(MCV) a thermostatically operated valve in the exhaust manifold for varying heat to the intake manifold with respect to the engine temp. Also called "exhaust heat control valve"

Manifold gauge set:

A complete, testing assembly consisting of a high side gauge, a low side gauge and a high side gauge, a test manifold, and a set of service or charging hoses. Also, can be used to discharge refrigerant, evacuate air and moisture, and charge air conditioning system with refrigerant

Manifold heat control valve:

A valve placed in the exhaust manifold, or in the exhaust pipe, that deflects a certain amount of hot gas around the base of the carburetor to aid in warmup.

Manifold heater:

A system used to improve the cold start behavior of an engine, consisting of heating ducts incorporated into the intake manifold that are connected to the water cooling system of the engine; alternatively, an electric heater may be used.
Also See:
inlet manifold heater
intake manifold heater

Manifold pressure controlled:

(MPC) a fuel injection system which determines engine load based on intake man pressure

Manifold pressure sensor:

A sensor that reads pressure changes in the intake manifold in relation to barometric pressure. Also known as manifold vacuum sensor, manifold absolute pressure sensor, pressure differential sensor, or vacuum sensor

Manifold runners:

Single passage in a manifold from one cylinder to the major manifold opening

Manifold, service:

Chamber equipped with gauges and manual valves, used by service technicians to service refrigerating systems.

Manifold surface temperature sensor:

A sensor that provides information on the surface temperature of the intake manifold

Manifold vacuum:

As the pistons move down on the intake stroke, they create a suction or vacuum in the intake manifold. This vacuum reading can be used to determine how well the engine is running.

Manifold vacuum sensor: (MVS)

A sensor that reads pressure changes in the intake manifold in relation to barometric pressure. Also known as manifold pressure sensor, pressure differential sensor, or vacuum sensor

Manifold vacuum zone switch:

A type of manifold vacuum sensor (MVS) that dramatically changes the sensor output signal level upon reaching a preselected level or zone of manifold vacuum.

Manoeuvrability:

British spelling of maneuverability

Manoeuvre:

British spelling of maneuver

Manometer:

1. A device for measuring a vacuum, consisting of a "U" shaped tube partially filled with fluid. One end of tube is open to air, the other is connected to a chamber in which vacuum is to be measured. A column of mercury 30 in. high equals 14.7 psi, which is atmospheric pressure at sea level. Readings are given in inches of mercury (Hg)
2. Instrument for measuring pressure of gases and vapors. Gas pressure is balanced against column of liquid, such as mercury, in U-shaped tube.

Manual:

1. Something done by hand.
   Also See:
   manual choke
   manual steering
   manual transmission
2. A colloquial term for a vehicle with manual transmission.
3. A book of instruction.

Also See:
flat rate manual
maintenance manual
owner's manual
repair manual
service manual

Manual adjuster:

A type of brake adjuster that must be adjusted from time-to-time, with the use of a hand tool

Manual bleeding:

A technique for bleeding hydraulic brakes that requires two people. One pumps the brakes, and the other opens and closes the bleeder screw.

Manual choke:

A linkage system which begins with a knob on the dash which can be pulled to activate and pushed to de-activate. The knob is attached to a cable and the other end of the cable is attached to a the butterfly valve on the carburetor. Because many drivers had difficulty knowing when to use the choke knob, manufacturers developed the automatic choke system which decides this information for the driver.

Manual-crank window:

See manually operated window

Manual frost control:

Manual control used to change operation of refrigerating system to produce defrosting conditions.

Manual gearbox:

See manual transmission

Manual hydraulic brake system:

A hydraulic-type brake system that utilizes unassisted driver effort.

Manually operated window:

Window operated by turning a lever by hand. Compare electric window

Manual panel cutter:

Cutting tool drawn manually across a panel surface to cut to the desired shape

Manual steering:

A steering system that does not have a power booster to reduce the effort of steering changes especially during slow movements such as parallel parking.

Manual transmission:

A transmission system in which gears are selected by the driver by means of a hand-operated gearshift and a foot-operated clutch. In a motorcycle the clutch is hand-operated and the gearshift is foot-operated. Contrasts with an automatic transmission. Also called a "standard transmission."

Manual valve:

(MV) A control in an automatic transmission which distributes line pressure to the various control valves and pistons which operate the multi-plate or band brakes or the clutches; operated by the driver via the selector lever

Manual version:

A passenger car with a manual transmission

Manufacturer:

See automobile manufacturer

Manufacturer discounts:

In some leases, particularly subvented leases, the manufacturer reduces the MSRP which lowers the purchase price of the vehicle, which the lease is based on. This is a form of capitalized cost reduction.

Manufacturer's performance ratings:

The performance data as specified by the car manufacturer

Manufacturer's suggested retail price:

(MSRP) The suggested retail price the dealer is asking. Generally the same as the "sticker price." Dealers typically sell at a discount to this price.

Manufacturing:

Process technology (i.e., metal forming, machining, injection molding, blow molding, die casting, forgings, electronics/electrical, assembly, coating/plating); capacity utilization (in percent); production volumes; strategic alliances (e.g., joint ventures, technology agreements).

MAP:

See manifold absolute pressure

Map:

A pictorial representation of a series of data points stored in the memory of the control unit of system with complete engine management. The control unit refers to the map to control variables such as fuel injection pulse width and ignition timing
Also See:
characteristic map
dwell-angle map
engine map
ignition map
spark-angle map
spark map

Map-controlled ignition:

A microprocessor-controlled ignition system with electronic ignition timing by means of an ignition map stored in the control unit memory. The engine speed is sensed by Hall generators at the distributor or magnetic pick-ups on the crankshaft, the load signal being given by pressure sensors which measure the air mass or air per unit of time

Map light:

An interior light to facilitate, for example, map reading.
Also See:
gooseneck map light

MAPP:

A stabilized methyl acetylene-propadiene fuel gas. It is a Dow Chemical Co. product.

Mapped ignition:

A microprocessor-controlled ignition system with electronic ignition timing by means of an ignition map stored in the control unit memory. The engine speed is sensed by Hall generators at the distributor or magnetic pick-ups on the crankshaft, the load signal being given by pressure sensors which measure the air mass or air per unit of time

Mapping:

See characteristic map

MAP sensor:

Manifold absolute pressure system sensor tells computer how much pressure is in the intake manifold

Maquila:

Mexican assembly plant located near the U.S.-Mexican border where most production is exported to the United States.

Maquiladora:

Mexican assembly plant located near the U.S.-Mexican border where most production is exported to the United States.

Marbling:

A special decorative painting effect with rotating brushes

Margin:

The return an intermediary achieves on the selling price of the article. That is, if the intermediary buys a product for $1 and sells it for $1.50, the margin is calculated. For example, .50 (i.e., $1.50 - $1) divided by $1.50, or 33%. See gross margin
Also See:
valve margin

Margin bracket:

A bracket connecting a side frame to the margin plate at the bilge

Margin line:

A line, not less than 3 inches below the top of the bulkhead deck at side, defining the highest permissible waterplane in the final condition of sinkage, trim and heel

Mark:

See:
draft marks
reference mark sensor
skid mark
swirl markstiming mark
tracking mark
witness mark

Marker lamp:

1. A light which is mounted on the extreme edges of the roof of a truck to show the maximum height and width of a vehicle. Also called "clearance lamp."
2. A side marker light

Marker light:

A side marker light

Market:

See:
aftermarket
do-it-yourself market
grey market
mechanic installed market
replacement market
gray Market Vehicles

Market share:

The percentage of total sales represented by an individual manufacturer/importer, make or nameplate.

Market Vehicles:

See gray Market Vehicles

Marking:

See:
size marking
water marking
wheel marking

Marks:

See mark

Mark sensor:

See reference mark sensor

Mark-up:

The return an intermediary achieves on the cost price of an article. Using the same example described above, mark-up is .50 divided by $1, or 50%.

Marles steering:

A form of cam-and-roller steering

Marmon:

A vehicle brand of which all 16-cyl.; 1925 74; 1926 74; 1927 75; 1928 E75; 1930 Big 8; 1931 88 and Big 8 models are classic cars.

Marque:

A particular brand name of a vehicle. Also spelled "marquee"

Marquee:

A particular brand name of a vehicle. Also spelled "marque"

Martin:

Aston Martin.

Mascot:

See:
Emily
Rolls Royce mascot

Maserati:

A vehicle brand of which the 1925-1948 models with required application are classic cars. The 1957-64 3500/3700 GT models are milestone cars.
Click image for books on Maserati

Masher:

A cyclist who habitually pedals hard in a high gear, at a slow cadence. The opposite of a "spinner."

Mask:

To cover the surrounding area when paint spraying to protect it from splashes

Masking tape:

An adhesive tape used to cover surfaces that border an area to be painted, so as to protect them

Mass:

The quantity of matter a body contains. Mass is measured in kilograms (and often incorrectly called weight). The mass of a body does not change if, for example, it is moved to the Moon where the force of gravity is less.
Also See:
sprung mass
unsprung mass
weight

Mass airflow meter:

(MAF) device for measuring the mass flow of air into an engine.
Also See:
airflow sensor
hot-wire airflow meter

Mass damper:

A device which reduces or prevents vibrations or oscillations, usually a weight which counteracts (balances) undesirable motions; used on drive shafts of some FWD cars

Mass-produced car:

A car which is manufactured in great numbers to a standard pattern and with extensive mechanization

Mass tone:

The tone of a paint as it appears from the color of the paint in the can; this is required for formulating the ingredients of a paint tone.
Also See:
tint tone

Mass transit system:

A system designed to transport large numbers of people or goods

Mast:

A tall vertical or raked structure, usually of circular section, located on the centerline of a ship and used to carry navigation lights, radio antennas and cargo booms

Master:

The primary or controlling device. A secondary or dependent device is called a "slave."
Also See:
brake master cylinder
dual-piston master cylinder
master link

Master brake cylinder:

See brake master cylinder.

Master con rod:

In a two-stroke dual piston engines, the connecting rod that is articulated directly on the crankshaft.
Also See:
slave con rod

Master cylinder:

1. The primary component for pressurizing fluid in a hydraulic system. Used in the braking system, it supports a reservoir for holding brake fluid and is activated each time the driver depresses the brake pedal.
2. The device that converts mechanical pressure from the brake pedal into hydraulic pressure that is routed to the wheels to operate the friction assemblies.

Also See:
brake master cylinder
dual-piston master cylinder
slave cylinder
split-system master cylinder
tandem master cylinder

Master cylinder pushrod:

The rod that transmits the movement and force of the driver from the brake pedal lever to the master cylinder piston.

Master link:

A special link on a chain that can be opened by flexing a plate, removing a screw, or some other means besides driving out a rivet. The retaining spring clip is shaped like a fish with a round head and twin tails. This illustration helps to determine the position of the clip because the "fish" moves in the direction of chain movement. When installed in reverse, the clip may come off.

Master model:

The first precision model of an automobile based on a clay model or CAD-data; essential for the manufacture of prototypes

Master pattern:

The first precision model of an automobile based on a clay model or CAD-data; essential for the manufacture of prototypes

Master switch:

See battery master switch

Master vac:

See vacuum brake booster

Master vac servo unit:

See vacuum brake booster

Masthead light:

A white light situated on the fore and aft centerline of a ship

Mastic:

Any heavy-bodied adhesive of such a consistency that it must be applied by notched trowel, gob, or by buttering methods

Mastication:

The reduction of rubber to a pulp preparatory to making tires

Mastic seam sealant:

Soft waterproof sealant for joints

Mat:

1. A dull, not shiny, paint finish. Also spelled "matt."
2. A covering.

Also See:
bead seat mat
fibreglass mat

Matched:

See color-matched

Matching:

See:
color matching
paint color matching

Mate:

To fit together

Material:

See:
base material
bearing material
molding material
performance characteristics of materials
piston material
soundproofing material
viscoelastic materials

Material safety data sheets:

Sheets that contain information on the handling of hazardous wastes, the use of protective equipment and the procedures to follow in case of an accident

Mating:

Fitting together; matching

Mating gears:

Gears which mesh together

Mating surface:

A surface which interacts perfectly with another

Mating thread:

A thread which engages with a corresponding thread, such as the male and female threads of a nut and bolt

MAT sensor:

Acronym for manifold air temperature sensor

Matter:

See particulate matter

Matrix:

That portion of the mold which surrounds the tire transferring heat to the uncured rubber and forming the tread pattern.

Matt:

A dull, not shiny, paint finish. Also spelled "mat"

Maxima:

A model of automobile manufactured by Nissan in Japan
Click image for books on Maxima

Maximum brake power:

The maximum power of an engine as measured by a dynamometer

Maximum diameter brake drum:

The largest diameter to which a brake drum can be machined or worn before it becomes unsafe. This dimension is usually stamped or cast into the drum near the hub. Typically, this is 0.060" over original diameter.

Maximum power:

The maximum power of an engine as measured by a dynamometer

Maximum trailer weight:

Also known as towing capacity; the heaviest trailer the vehicle is rated to tow. Towing capacity is typically based on the vehicle plus a driver of 150 pounds. The weight of additional passengers and/or cargo should be deducted from the maximum trailer weight.

Maybach:

A vehicle brand of which the 1925-1948 models are classic cars.

Mays:

See Raymond-Mays

Mazda:

A model of automobile manufactured in Japan
Click image for books on Mazda

Mazda RX:

A model of automobile with a rotary engine manufactured in Japan
Click image for books on Mazda RX

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