what grade of fuel for a 350 V8 Tuned Port Fuel Injected engine

Asked by robertkert Dec 18, 2007 at 10:52 AM about the 1988 Chevrolet Corvette

Question type: General

4 Answers
83,745

littlehorn answered 16 years ago

89 should be fine. I believe the compression on these engines wasn't really high like the early 350s, so you should run fine on mid-grade.

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105

russ87vet answered 16 years ago

the best fuel to use is PREMIUM fuel--93 octane--for the best performance and fuel mileage. You can use 89 but it will not perform to the best of its ability no matter what anyone else thinks or says. I have performed quite a bit of in-depth comparisons and now only use premium in mine. The cost difference is not worth the difference in performance.

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dmajor answered 16 years ago

How about using regular grade gasoline and adding a octane booster product for each tank? I did this with my 2000 740iL BMW and the pings went away with a during acceleration. dmajor

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