Fuel Mileage
 

I am getting horrible fuel mileage on my 4.2. something like 12-14 how about anyone else?

i get 10 on my 5.4, so that on a 6 isnt to hot man

ya get bot 12 empty and 9 wen i pull my trailer

when I cruise down I-95 between Fort Lauderdale and Miami with no traffic I can get upwards of 16-20 I would guess. But when I drive through the city or traffic, I swear I get maybe 13ish. Does seem a little pathetic for a v6 compared to the v8 and their size/power difference.

I think even my interstate cruising is like 15-16 at most on my 4.6.

it's enough to survive by for now, I'll be able to pay off my truck while only reaching around 140k miles. from that point I can start saving up for a v8 build/swap.

I'm getting about 22 MPG in my 4.2 with conservative driving and 19 if I just drive normally fast. But I have factory size radials @50 psi and have recently cleaned the injectors with Seafoam. Plus new wires.

city driving w/ my 4.2 is about 15 maybe 20 on highway.i ddont think its any better than that.the 30 gallon tank makes it seem to go farther.:thumbup:

In town 11.5 to 12.5 and hwy is like 14 to 15

That doesn't sound quite right I would say... In my lifted f150 4.6 I'm running stock gears and 35s, and on the highway I get around 20, believe it or not. I drive it everyday and haven't filled up in 2 weeks. Need to tho. Depends on how you drive it. How is your air pressure in your tires? I run mine at 45psi with no harsh ride and no weird tire wear. I also run mobil 1 10w30. Looking to go royal purple in the diff once I swap gears and royal purple in the engine. Maybe you do the same...? Man that's about all I could suggest other than changing your o2 sensors if it's been awhile...