Thread: Why does 370z require premium gas?
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Old 10-28-2010, 11:37 AM   #12 (permalink)
Lug
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Originally Posted by ImportConvert View Post
The mustang GT has high compression as well. However, you will note that it produces a lot less power on anything less than premium. Ford was smart and created a few different tunes in the factory computer. It will retard a bunch of things and happily (but less efficiently) run on lower octane fuel.

Nissan did not (and I don't blame them, if you buy a sports car, you should run premium if it requires it.) do this. It is a high-compression engine and you need to run the recommended octane at minimum.
According to Ford, the mustang goes from 412 hp to 405 hp when changing from 91 to 87 octane.
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