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I could help given the old year of my drivetrain. I know I have answered this ...
I think I may have gone through 3 fuel changes in 23.
for a few years in the 90s, southern new england fuel and southward car was gaining alot of power.. it was real fuel
my Maine is horrifying with the ethanol. there is no old vehicles. Caught onto this years ago.
the boxers kick all the weirdness out and seemingly stayed alive.
the ethanol madness is the factors of biofuel to create the ethanol. real ethanol is no harm, except for how light it is.. and it will suck on a bad pcv system to create some cylinder bung with its own version of fuel, on every oil vapor..
new engines have gigantic intakes, they are all engineering together on this facts of ethanol no doubt...so should not be a problem.
dropping fuel mileage I have not done...it does not like EGR.
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