MPG, boost
New User
Joined: Aug 2008
Posts: 12
Likes: 0
KC, I have 84k on an 08 F250 6.4. - I get Hwy milage between 19-19.5 . Bone stock. I think proper breakin has alot to do with it, dont get me wrong, if I get slightly agressive it can drop to 16 or 17hwy very fast. My city only driving is 13.5 to 15 at best. I've not noticed the regen process but a few times. I think more hwy miles may keep it clean -active regen vs passive regen. Only problem is you really have to read every pump to ensure it's ULTRA low 15ppm sulfer, I made the mistake of starting to fill up and notice I'm pumping LOW sulfer 500 ppm, which the feds want us to use in pre 07 vehicles. Pre 07's can use either grade, I think.. While I have to clean out my shorts when I make that mistake. Bottom line, if you buy an 08, do a recon mission to your local stations to ensure they have the fuel until it's all replaced with Ultra low sulfer. I know everyone has an opinion on running this but Ford claims it will gum things up and could affect your warrenty.
