Prolly not enough to justify going to e85 without going forced induction honestly, even on my 5.0 mustang it was just changing injectors and tune for about $250 and it wasn't worth the maybe 5whp and drastic loss in mpg. I went from 20mpg to 14mpg by switching, and if u have the vin I can check to see if it has a salvage title I work for nissan
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