This is interesting - I switched to PURE gas, which has no ethanol in it. Running 93 octane gas, after two fill-ups with the PURE gas, my mileage has gone DOWN from 17.5 to 16.2.


Less mileage with NO ETHANOL??? How did that happen?


-tp




"'90 300SE gets 17.5 in mostly city driving, with a lead footed driving style. I also keep it in 3rd sometimes in town to keep the motor in the power band and to make deceleration without brakes possible. That's using 93 octane gas with 10% ethanol. I feel reasonably certain that I would be getting over 20 if I drove grandma style.

I just found a station that sells PURE gas (the brand and the description) no ethanol!

It'll be interesting to see if my mileage improves noticeably."