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Metro, No I do not have a scangage or anything like that. I had seen one last year and asked if they worked on a diesel truck and got no answer, so I never got one. Now that I know they will work, I am going to get one ASAP.
Tygen, I fill my tank and I drive it and when it is empty I refill it and do the math and get my MPG. Without a scan gage I have no way of telling at what speeds I get better MPG, like you said.
Thanks for all the help and comments.
Doc.
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