Quote:
Originally Posted by babybenz
Hey guys i did it we had a meet today in mt dora florida i traveled all the way from tampa florida there and back was exactly 200 miles and i filled up 4 gallons of gas when i got back for an exact total of 50mpg  i was shocked i was averaging 42 before that tank
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You prolly did better than the average you'd gotten up till now since all-highway is generally better than mixes that include at least some city driving. But we've had this discussion before (this is at least the third time since I joined last month) and the answer is always the same:
a) too small a sample
b) the fuel nozzle doesn't shut off perfectly, so just because it clicked off at 4 gal doesn't mean you replaced all that you'd used; much more likely that you used about 4.5 gal (mpg = 45).
c) why do you suppose you'd suddenly get a 20% increase in mileage?