Rick's Free Auto Repair Advice

Posts Tagged: better mileage with higher octane

What is Octane?

Octane and gasoline Octane eliminates detonation. What is detonation? Let’s review the combustion process in an engine. Air and fuel are combined during the intake stroke. Then the air/fuel mixture is compressed during the compression stroke. That creates heat, not quite enough heat to start the mixture on fire though. As the piston reaches the top of the compression stroke, the air/fuel mixture is ignited by the spark plug. As the air/fuel mixture burns, a flame front expands away from the ignition point near the spark plug, expanding pressure in … Read More

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