GM Firebird 1982-1992 Repair Guide

Fuel Recommendations


The engine is designed to operate on unleaded gasoline ONLY and is essential for the proper operation of the emission control system. The use of unleaded fuel will reduce spark plug fouling, exhaust system corrosion and engine oil deterioration.

In most parts of the United States, fuel with an octane rating of 87 should be used; in high altitude areas, fuel with an octane rating as low as 85 may be used.

In some areas, fuel consisting of a blend of alcohol may be used; this blend of gasoline and alcohol is known as gasohol. When using gasohol, never use blends exceeding 10% ethanol (ethyl or grain alcohol) or 5% methanol (methyl or wood alcohol).

The use of fuel with excessive amounts of alcohol may jeopardize the new car and emission control system warranties.