I think what he is claiming that he is getting that milage for the fuel he pays for. I run WVO in a two tank setup and I filled my tank the other day and I used 7.5 gallons of fuel and drove over 600 miles, which yields 81mpg of diesel. So if you only use the gallons of diesel I used to calculate the milage you get a much higher number. In reality I still only get somewhere in the 20's for milage.

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