Quote:
Originally Posted by roosterk0031
I still believe Same day data best, short time (weeks) is next best, year long worst, parts fail slowly.
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For one of my past cars, I had long term E10 mpg records. When I finally got into E0, the car had 40,000+(?) more miles, when tested with E0(on up to 100,000 miles). The other two cars also had initial E10 mpg records, when I switched to E0 for later long term mpg records. As stated often, E0 showed 8%, 7% & 5% better mpg than E10 for the 3 cars.