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Old 10-18-2011, 05:42 PM   #13 (permalink)
tru
EcoModding Apprentice
 
Join Date: Aug 2011
Location: FL
Posts: 126

tru - '05 Ford Focus ZX3
90 day: 39.46 mpg (US)

the truck - '02 GMC Sierra Denali
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Quote:
Originally Posted by beatr911 View Post
Please gauge your MPG changes over at least two tanks. With the amount of change you are likely to see, other factors (such as the tailwind) can impact your numbers and not give you true results.

Maybe an undertray would give better results and your girlfriend would love you even more.
two tanks even with a scan gauge? that seems excessive?

i figure over the course of 2 or 3 days of my commute which is about 180-270 miles is plenty. i had to take it off early due to rain today, but i will add it back slightly modified when the weather clears some.
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