Quote:
Originally Posted by RichXKU
I'm with Dojo. Right about now (late october/early november) is when they switch over to oxygenated gas, which means terrible mileage for all!
You should see a label on the pump with something like "Between October 31 and April 1 the gasoline dispensed from this pump is oxygenated" yadda yadda. If you also see a label that says "Contains up to 10% ethanol" be prepared to never see 40 MPG again!  (at least until summer)
I'm still going to try and keep up my 40.5 MPG average thogh.
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Ethanol could very likely be the reason. However, I haven't found ANY gas in my area that DOESN'T contain ethanol. As a result, my highest mileage has been 28 mpg. Rich, do you have gasoline without ethanol in your area? I don't think it exists in the Philadelphia area at all!