gasoline

Asked by bazapoet May 07, 2016 at 11:47 PM about the 2010 Ford Focus SES Coupe

Question type: Car Customization

I am planning to get  a cold intake and catback exaust and was wondering  if I ran premium gas  instead of regular fuel would if damage the engine or make it run better

2 Answers
157,435

Bob answered 7 years ago

Regarding installing cold air and exhaust...I think that just running premium fuel with out a tuner will only result in your wallet getting lighter. It will likely make no difference in MPG or power. Adding a tuner with a premium fuel tune will result in increased Horse Power. Anytime modifications are made to both intake and exhaust the engine tune should be modified with a tuner to get the most out of your modifications.

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41,815

Auto_Centric answered 7 years ago

Complete waste of money your engine can NOT utilize premium fuel to an advantage. Compression ratio is the real factor when considering fuel octane. Regards

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