Glossary of Auto Terms

DriverSide's Car Dictionary has the most comprehensive definitions of automotive terms. This auto glossary can help you decipher what your mechanic is fixing and what the purpose or function of the particular auto part or accessory is for. We have taken the mystery out of automotive service jargon, so that you don't have to.

Lean Fuel Mixture

An air/fuel mixture that contains an excessive amount of air in proportion to gasoline. This leads to higher exhaust gas temperatures, and is generally more dangerous to the health of your engine than an overly-rich mixture, though neither are desireable.

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