Automotive Dictionary

We know mechanics can speak their own language. That’s why we’ve tried to de-mystify some of the more unusual terminology to ensure you’re in control of your vehicle.



A fuel mix containing 10% ethanol and 90% petrol, by volume.

A fuel mix containing 95% ethanol and 5% petrol, by volume.

A spoiler behind the rear windows to improve stability in side winds.

To corrode and remove the metal from a body panel which has been subject to excessive rust.

Electronic fuel injection system (EFI):
Injects fuel into the engine’s cylinders with electronic control to time and meter the fuel flow.

Engine management system (EMS):
Responsible for controlling the amount of fuel being injected and for adjusting the ignition timing. Optimum functioning of the EMS assures maximum engine power, with the lowest amount of exhaust emissions and the lowest fuel consumption.

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Who is Elvio?

Elvio is a seasoned Motor Mechanic with 25 years experience in the automotive industry. Well-known for asking the most obvious questions and his bizarre obsession with Datsuns (having owned more than 10), he seems to think the 70s was the golden era of motoring. Current rumours suggest he owns more than 100 caps, prefers Belgium bier to Australian and has been confused with the real Speedy Gonzalez. Well-known at the racetrack for getting maximum performance on a budget and his obsessive attention to detail, he is now taking his passion for all things with an engine to help his customers in his blog. Ask Elvio.