is a high octaine gas harmful to a 2013 ram 1500 5.7 hemi

Asked by scottbo1 Feb 13, 2017 at 06:25 PM about the 2013 RAM 1500 Outdoorsman Quad Cab 4WD

Question type: General

can I use racing fuel or a high octaine fuel in my truck

4 Answers
103,435

KenF answered 7 years ago

If it's 98 to 100 octane, it won't contain lead, the 110 octane would have the lead in it. It would only make sense if you had a high-compression engine, if your engine is 10:1 or so you would have to advance the timing to get any benefit from using racing fuel (@ 6.50/gal BTW) , but you have variable valve timing which is controlled by the PCM, so you would need that to be replaced by a tuned PCM. A lot of spending for so little gain.

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