Glossary “O/D” Definition:
Overdrive
o
octane number
Glossary “octane number” Definition:
The number representing the average blend of iso-octane with an index of 100, and other hydrocarbons with an index of 0, usually between 87 and 92.
octane rating
Glossary “octane rating” Definition:
Term used for octane number. Measurement of a gasoline’s ability to resist engine knock. The higher the octane rating, the less prone the gasoline is to cause engine knock (detonation).
octane requirement
Glossary “octane requirement” Definition:
Minimum octane rating of a fuel required to operate an engine without a spark knock.
octane requirement increase (ORI)
Glossary “octane requirement increase (ORI)” Definition:
Increase in octane requirement that results from the build up of combustion chamber deposits.
OCS
Glossary “OCS” Definition:
Overdrive Cancel Switch
OCT ADJ
Glossary “OCT ADJ” Definition:
Octane Adjust Status
OCT ADJS
Glossary “OCT ADJS” Definition:
Octane Adjust Software Status
octane
Glossary “octane” Definition:
A gasoline’s ability to resist detonation. The higher the octane number, the greater the fuel’s resistance to detonation.
octane enhancer
Glossary “octane enhancer” Definition:
Common term designating components that are added to gasoline to increase octane and reduce engine knock. Examples are toluene, ethanol, ETBE, and MTBE.
OCP
Glossary “OCP” Definition:
Over Crank Protection
Occupational Safety and Health Administration (OSHA)
Glossary “Occupational Safety and Health Administration (OSHA)” Definition:
A branch of the Federal Government that regulates and oversees the occupational environment as related to health and safety.
occupational safety glasses
Glossary “occupational safety glasses” Definition:
Protective eye wear designed with special hit-impact lenses, frames, and side protection.
OCIL
Glossary “OCIL” Definition:
Overdrive Cancel Indicator Light
OC
Glossary “OC” Definition:
Oxidation Catalyst
OCC
Glossary “OCC” Definition:
Output Circuit Check, or Output Cycling Check
Occupational Exposure Limits (OEL)
Glossary “Occupational Exposure Limits (OEL)” Definition:
Maximum allowable concentrations of toxic sunstances in workroom air to protect worker who are exposed to toxic substances over a working lifetime.
OBD-I
Glossary “OBD-I” Definition:
On-Board Diagnostics Generation I. An on-board automotive diagnostic system required by the CARB since 1988, which uses a microprocessor and sensors to monitor and control various engine driveability functions.
OBD-II
Glossary “OBD-II” Definition:
On-Board Diagnostics Generation II. OBD-II expands upon OBD-I to include emissions system and sensor deterioration monitoring.
OBDII Monitors
Glossary “OBDII Monitors” Definition:
Either a passive, active, or intrusive test run by the diagnostic management system after the enable criteria has been met.