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Originally Posted by tbaleno
6lbs per gallon*10 gallons is only 60lbs. Not worth the effort alone. Unless you are going for every bit of mpg per gallon. 60lbs is only worth about .25mpg or so at 50mpg.
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Well at a third full vs half a tank I was figuring 6 gallons in the tank and filler neck vs about 18.
My calculations were also based on 8 lbs/gallon of gasoline, which could be off, but I thought gas weighed closer to 8 lbs as opposed to 6. I've seen quotes of anywhere from 6.62lbs to 8, and being a salesman by nature, I figured I'd use whatever number best represented my case.
I still submit that I have always found my vehicles a bit more sluggish after filling the tank, and even though the increase is marginal, adding 10 more pounds of pressure in a tire vs @ manufacturer recommended pressure I doubt would give much more than a 2% increase in FE.
Anyway, glad I started this thread...we all now know how much FL07's wife weighs, and if he gets kicked out of the house...he can crash at my pad!