2004 6.0 NV4500 Tahoe

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Dantheman1540

Dantheman1540

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I am planning a tank of the 15% next to see if I pick up a bunch of knock or not. I am running a BBP tune for 89 with 10% now but it will take forever to burn that up now that I have the Saturn.

Shouldn't pick up knock if the octane rating is the same as the E10 or E0. The ethanol increases the octane (anti-knock) properties, but the mix is intended to match the same octane rating. You may lose a few mpgs, but that should be all.
 

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