Dodge Challenger Forums - View Single Post - The Premium fuel myth
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Old 02-05-2010, 04:17 AM
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lear4406
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The cars today have a computor and knock sensors. They will detect knock and cut timing. So if you want the HP you have bought the car for, I would go with the advertised octane. If you use lower rated fuel you will lower the HP rating. I always go with 93 oct. and want the best HP I can get at all times. I even add 109 octane when going to the track so I get the best performance out of the engine I can get and to add insurance to keep the engine safe from detination. I would only use lower octane in the case of an emegency and I would also baby the car while the cheap stuff is in there.
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