If you fart with the windows up, you'll see a 2 mpg increase.

I think a lot of folks replace an old dirty stock filter with a new k&n, and then assume the resulting mpg increase is due to the brand of filter as opposed to a clean vs dirty filter.

 

That was the reason I bought one for my last two vehicles, so I would not have to keep buying filters. On my VW Jetta, I didn't see an MPG increase until I got rid of the rest of the intake restriction. Then I got 2 mpg. My Taurus I do not recall. I put an AMSOIL in the RAM (sorry), so I can't give you any numbers.

For everyone, what kind of fuel are you running? I have tried several flavors (Conoco, Exxon, Chevron, Flying J, Sinclair) and my truck gets another 1.5 mpg when I run Conoco. Try it for a tank or two. No, I do not own Conoco stock.

And now back to your regularly scheduled thread...