Quote:
Originally Posted by kirakira
Does 91 and 94 have any difference in milage?
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There is such a marginal difference that it doesn't really matter.
Unless you are trying to Hyper-mile your 370z which defeats the purpose of having it.
91 and 94 Octane is for engine compression, use 89 and you will get some engine knocking because of premature ignition.
Prolong engine knocking will wear and tear your engine faster.
When you drive a Z mileage shouldn't be an issue, go out an enjoy it.