bambo2888

I think im getting better gas mileage in 4hi than in 2hi. I dont think im just being paranoid, but I decided to observe the info center with the instant mpg display in both 2 and 4hi from mild take off's from traffic lights. i noticed my mileage is slightly better by 3-5 mpgs until 50 mph.

am i just going nuts?

Lenn

Quite possibly due to the fact that the static inertia is more distributed over the entire driveline rather than just the two rear wheels under acceleration.

Jason8691

You may be nuts, but its not a good idea to drive in 4hi on dry pavement. The resulting costs in fixing it may cost a lot more than you save in gas!

Lenn

Though about mentioning that, but I thought between the owners manual and warning stickers, it was common knowledge. Nice.

bambo2888

im aware of this, and that's why i tested it for a minimal distance for a few minutes. i am just concerned that my gas mileage is being robbed further than necessary for having a full size truck...

MHC-F150

Mes think you're going nuts, but what do I know.

What year/make/model do you own?

Personally, my old '02 F150 & current '06 F150 both got worse mpgs in 4WD than 2WD, So did my '85 & '99 Rangers.

Wouldn't trust your info center too much. I'd assume on initial take off you may experience a slightly better mpg rating, but once going you'd see that increase dwindle quickly.

bambo2888

thats exactly what i figured, i just wanted to check with yall. ftr, its an 04 scab

Quatsino

I played with this idea for awhile. On a long flat road at a steady state on cruise and no wind at about 45 mph my info center is reading out 27.1 mpg - over a distance after reset of about 2 miles. I switch into 4H and a short while later the reading is stabilized at 26.8 mpg.

Absolute numbers aside - running in 4WD brings the mileage down - as one would expect...