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Showing results for tags 'mileage'.
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I know there are a lot of people wondering about where the "sweet" spot is on the cummins for mileage and I am here to tell you that there is no sweet spot. Speed kills. I have ran numerous tests and proven that every 5mph gain costs you 2mpg. A while back I was testing this theory and on a 70mph trip I got 21mpg, on a 60mph trip I got 25mpg, at 55mph I was at 26.6mpg. So I theorized that doing 65 on this 700 mile trip would yield 23, and I was exactly right. I got exactly 23mpg. Less RPM=less injections per minute. Less speed=less wind to push out of the way. It's simple, and it works. I know some people out their are claiming 26mpg at 70mph or something crazy like that but if thats the case, why aren't they posting 30+mpg numbers when they do 60! :confused:
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i recently got a 04 2500 put a s@b cold air on. looking to improve mileage any ideas or thoughts also helpful. and curious about diesel fuel additives
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