Chevrolet Cobalt Owners Manual: Preface

Chevrolet Cobalt Owners Manual

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Preface

GENERAL MOTORS, GM, the GM Emblem, CHEVROLET, the CHEVROLET Emblem, and the name COBALT are registered trademarks of General Motors. This manual describes features that may or may not be on you ...

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Chevrolet Cobalt Owners Manual. Gasoline Octane
If the vehicle has the 2.2L L4 engine (VIN Code 5), use regular unleaded gasoline with a posted octane rating of 87 or higher. If the octane rating is less than 87, an audible knocking noise, commonly referred to as spark knock, might be heard when driving. If this occurs, use a gasoline rated ...