Originally Posted by mgwilson32
i have a 07 f150 sxt the 4.6L v8. stock was getting 15mpg then i added a k&n cold air, and a banks catback bolt on exaust. that bumped me up to 17-18. but then i put 33x12.5 on 20"rims and im all the way down to 12mpg. horrable for a little single cab small block v8. i thot about adding a throttle body spacer, but have heard mixed things about it. also its warrantied for another 30,000 miles so i cant chip it. what can i do to increase fuel mileage and hp/torque to this thing? anyone have any tricks up their sleave?
Not trying to be an ***, but you won't really get much better. If you are so worried about MPGs than why did you put on 33s on 20" wheels? Just my two cents.
The only thing I can suggest is something to correct your speedo/regearing. Otherwise, thats about it.