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Challenger SRT Hellcat
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I dont want to run e85 the whole time,just want to add a gallon or 2 to a full tank of 93oct just to help raise the octane a little when im running the car hard or on the dyno.
Just remember that while E85 has a higher octane number it also has a lower BTU rating. This means less energy/power per gallon. You may lose a few HP adding E85 without tuning.
 
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