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Facts or conjecture.
Conjecture off course. Thats why I am gathering data :-) Now that I have data I have Theory. Once I run more thorough testing on multiple vehicles THEN I will have facts.
Initial testing is pretty solid and conclusive. I was even shocked by the results and I WANTED results badly :-)
I have over 40 tanks of gas on this car (and I mean TANKS not 100mile or 50 mile fill ups but almost every one is 300 miles or more)
I have already put over 10,000 miles on this car and I have only had it for 5.5 months.
in that time UNTIL I put 8 gallons of washed ethanol free gas in the car I never got anywhere remotely close to 55mpg and I tried HARD. Even Engine off coasting engine off at all stops maximizing coasting engine off on hills and never going over 45mph I could only "just" eek out 50mpg from this car.
I maintained this higher fe 54-55 mpg even towing a trailer carrying 4 people and gear and going up to the mountains and back over 4 tanks of gas and when I put 10.75 gallons of E10 into the car my next tank was 46mpg and it was warmer out.
thats pretty darned conclusive and AWFUL close to "fact" but not quite yet :-) now I have real unwashed genuine E0 to run some tests on and I am getting more this coming week so I should be able to get a good 3 or 4 tanks on E0 and then go back to E10 and see what happens.
This tank is rubish. I am towing a 200 pound trailer over 250 miles with 100 pounds in gas cans and a 200 pound washing machine thats bigger than the car on it :-) (btw my FE is still excellent considering!!)
I bet even with all that I will STILL beat my E10 figures :-)
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