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Old 09-23-2011, 10:53 AM
cn90 cn90 is offline
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Location: Omaha NE
Join Date: Mar 2006
Posts: 14,351
Mein Auto: 1998 528i 5-sp 140K+
Maybe it is my imagination but I have switched to standard gasoline (No Ethanol) for the last few weeks, even with Octane 87 (or 91), the fuel mileage "seems" to improve.

I have not done any actual measurement yet (such as driving 200 miles on highway and measure how much gas used), but it seems the gas mileage is better with standard gasoline.
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