CB

1. An API classification for
2. Diesel engine oil introduced in 1949. It operated in mild to moderate duty, but with lower quality fuels, which necessitate more protection from wear and deposits; occasionally has included gasoline engines in mild service. They provide necessary protection from bearing corrosion and from high temperature deposits in naturally aspirated diesel engines with higher sulfur fuels. It replaced CA oils and was replaced by CC oils in 1961.
3. An acronym for Contact Breaker.
4. An acronym for Citizens' Band
5. Acronym for Cab-Behind Engine
   Also see

   • CB radio

CBD

1. Acronym for Closed Bowl Distributor
2. Acronym for Cash Before Delivery -- a shipping term where the seller has received payment before shipping. It contrasts with
3. cash on delivery (COD)

CBE

Acronym for Cab-Behind Engine

CBOB

Acronym for conventional gasoline blend stock for oxygenate blending (Motor Gasoline Blending Component)

CB radio

A two-way radio which is limited to specific frequencies. Initially used by truck drivers and later by both mobile vehicles and stationary sites; but more recently it has declined in use with the advent of cell phones.

CBR process

Acronym for Controlled Burn Rate process. It is a method of improving fuel economy by increasing or decreasing the rate which the fuel burns

CBU

Acronym for Completely Built-Up.

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