Why there are different grades of Gas and the differences.
In: Chemistry
I assume you’re talking about the different grades of gasoline. The biggest difference between them is their octane rating.
The engine in a car mixes air and fuel, squeezes it together (compresses it) and then burns it. The more you can compress the air/fuel mix before burning it, the more power the engine can make.
If you compress the air/fuel mix too much, it will ignite too early and damage the engine. The difference between say regular and premium gasoline is how much you can compress the air/fuel mix without running into such problems.
High-performance engines are usually designed for high octane (premium) gas, whereas regular cars can use lower octane fuel.
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