Changing from premium fuel to regular?
Changing from premium fuel to regular?
Well, I'm picking up my car tomorrow, and it seems that the previous owner only ran premium (91 where I live in the car). The car is a 89 rx7 turbo II. However, I have read on that as long as the car is stock (which this car is), mazda recommends running 87 in the car. Will there be any ill effects if I switch the next tank of gas to a lower octane fuel?
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