Originally posted by Pu241
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Also, because the mods are only going to effect the gas mileage by 4-8% (or so), it will be difficult to see any difference over the natural variability of mileage (temp changes, city driving, tire pressure, etc).
What I am doing is leaving it on for an extended period of time, and since I have all last years data, I should see an increase in my average mpg this next while compared to last year at this time.......
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