scottosborn
07-08-2007, 01:15 PM
Has anyone tried using those ffi mpg caps in your fuel tank to increase miles per gallon? If so, have you seen any negative effects? Have you seen any increase? I was tempted to buy some and try it.
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scottosborn 07-08-2007, 01:25 PM Sorry, I see the question has been asked. Sorry. | ||