When I use E10 (10% ethanol) in my 370Z I gets at least 10% less mileage. I check my mileage each tank. The same happened with my 2010 Honda Civic Si. There was an article a few months ago in Consumer Reports about damage that E10 ethanol is causing to newer cars with smaller engines and with turbos. Some of the manufacturers have issued TSB's about the damage.
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Danno from the middle of no where.
SOLD 2016 Red Nismo 370Z -
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