i have a 1991 ford F150 with the 4.9l and i am wondering how to get better gas mileage...right now I'm getting around 12-13 at the best but i don't think i want to do a aftermarket intake what are some of my options. also i put new wires and plugs on it about half a year ago so that is outta the way.
No, any advertised significant mileage boost is a myth it will give a little more power, but you will only see mileage under perfect highway conditions. Mileage is determined by how educated your foot is.
"Its a Ford. Nuff said. Everything else is just a glorified tonka toy"
"ASE" Certified" Parts Professional
92 F150 302 4x4 Long bed Extended cab
2001 Taurus wagon
If not seafoaming it, then some lucas FI cleaner if the 4.9 is EFI. If you have a tonneau on, get rid of it. There's a vortex created in the bed of the truck that lets other air flow right over it, if you put a tonneau on, you're destroying that and destroying the mileage even more. Same with the mesh tailgates and whatnot. Dropping the truck would give more aerodynamics, but it would probably ruin the look, and going with the stock size tires instead of any aftermarket sizes you might have. Intakes probably won't help much, but if you had true dual exhaust it might.
Last edited by Mr.Distance; 12-25-2010 at 05:27 PM.