More Miles per Gallon (400 miles per tank)!!!!

[Ricky Bobby]

pretty nice on the 4.8is mileage!

I get about 18-19 mpg over mixed driving about 60% highway, I have a 5 speed though and under the impression manual will yield higher mileage in mixed driving.

Last tank I filled up my range was about 430 miles, lifetime consumption says 18.9 MPG on the BC

[tmv]

We average about 15mpg in city driving with our 3.0i. I have new O2 sensors to replaced (105k miles) and see if it improves at all.

[epdarks]

Nice results, lflaco.

Mine will average 15.5 MPG in the city, 17 on the highway with the cruise set at 80, 20-21 with the cruise set at 55-60.

I always wondered how much the giant tires hurt the MPG...

[bcredliner]

Mine is the same as epdarks and that is with stage 3 Dinan mods.

[epdarks]

Originally Posted by bcredliner

Mine is the same as epdarks and that is with stage 3 Dinan mods.

I didn't think you had the S/C?

[bcredliner]

I don't have S/C I have nitrous. I have Dinan stage 3 engine and transmission software.

[epdarks]

Originally Posted by bcredliner

I don't have S/C I have nitrous. I have Dinan stage 3 engine and transmission software.

I always thought the stage 3 was the S/C, not that it really matters, it's just an arbitrary number that Dinan assigns.

[Clockwork]

on my '05 4.4i with a well maintained engine/tranny (as I'm sure most of you have as well), I get 531miles to a tank when cruising at 65mph. I've done that a bunch of times and its funny cause I NEVER thought I'd be able to get that. And thats not math from the RANGE either, its legit begin to end of trip mileage.
This is also in winter when gas gets sucked back more, BUT I run 255/55R18's too, so it kinda evens out I guess.

[TiAgX5]

Originally Posted by Clockwork

on my '05 4.4i with a well maintained engine/tranny (as I'm sure most of you have as well), I get 531miles to a tank when cruising at 65mph. I've done that a bunch of times and its funny cause I NEVER thought I'd be able to get that. And thats not math from the RANGE either, its legit begin to end of trip mileage.
This is also in winter when gas gets sucked back more, BUT I run 255/55R18's too, so it kinda evens out I guess.

'03 4.4 sport pkg here. I have done several runs between Dallas TX and Spring Hill FL (1100 miles, GPS verified) with a SINGLE fuel stop and showing 60 miles to empty at arrival. New fluids in trans/Xfer case/diffs (at 100k miles), tires inflated to 38 psi (I usually remove the staggered wheels and mount the "highway wheels" for long road trips, those are 255-55-18s non-stagger), no AC, windows up and speeds below 70mph. That works out to around 580 miles a tank. I've logged and calculated my mileage and regularly see over 23 MPG during highway driving when I can keep it under 70 MPH. Running at 75 MPH the mileage drops to around 20 MPG.

FWIW, I add 10 oz of Lucas Upper Cylinder Lube with each fill up, an addition $3 on a $90 fill is not noticeable. I've been using this product for over 20 yrs and have yet to have a fuel system issue on any of my vehicles.

Regular city driving in the Dallas area returns around 400 miles per tank (just now checked the OBC, 345 traveled with 53 to E)

[bcredliner]

I checked my Dinan receipts. I have stage 4 engine and transmission software that matches up with Dinan other mods other than the S/C. There is engine software that comes with the supercharger but there is no stage associated. Stage 4 is to match up with Dinan throttle body, air flow meter, cold air box and exhaust.