Hey Scotty. What is there real deference between regular gas and supreme gas. I know that octane is the ability of a fuel to resist ignition under compression but why is it that mazdas sky active engine with a compression ratio of 15:1 can run on regular gas but older vw engines with a compression ratio of 10:1 require premium fuel?

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ScottyKilmer
ScottyKilmer

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Because modern cars are computer run and they can compensate for anything. Old cars could not do that

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