SKIP1718

my father-in-law just bought a 2002 chevy 8.1 dually. he only gets about 13 mpg around town. he gets about 8 mpg when he is towing his fifth wheel. if anybody has proven improvements to gas mileage please let me know. thanks

SleekSilverado

sell it, some people will say to put a air intake on it and exaust or something but when I did it on my 5.3 i went form 16-17 hiway mpg to about 13-14 mpg so its your call

Neil 6.0

There are a few guys on pickuptruck.com running a reprogrammed PCM from Wester's Garage and are claiming a little better fuel mileage along with noticeable power increase. This guy has an 8.1 and is pleased with the new PCM: flywater guide's comments

Give it a look,
http://westers_garage.eidnet.org/Index2.htm

1BADHD

Consider him lucky! My dad has a 8.1 and gets 9 loaded or unloaded. Gas milage sucks, but they are sure fun to drive.

Flyer

iTrader: (1)

Park it and get something economical to drive when you don't need to tow.

I get about 11 on a goood day in the city with my half ton.

OOsilverado

Intake and Exhaust would help, on every car I have done this too, the mileage has gone up. Anything to make it easier for the engine to get the air in and out of it will help you out

00scsb325

I am getting around 18mpg in my 5.3. I only started around 16.5 when I first bought the truck. It really went up with a programmer, intake, and really went up with a throttle body spacer. But that is on a 5.3. Good luck.

1BADHD

Those mods do help some. But if your like me, you like to hear the exhasut. So you stand on it. WELP! Your fuel mileage just got cut in half. LOL.

10.5 Dave

iTrader: (5)

13mpg is awesome for that rig in town.My 02 2500HD gets 9.5 overall.Buy a Dmax,mileage is significantly better(I avg 16.5mpg)its faster than 8.1 also.At 100,00 miles a Dmax is worth $6000.00 than comparable 8.1.I'll never buy another big block in a pickup again.

Tom@SpeedInc

iTrader: (5)

I would question the accuracy of 13mpg average, i'm getting 10.7 average, crusing getting 15-16. To get better fuel economy I would suggest using AC to a minimum, running 45psi possibly (these tires have heavier load rating from 1/2 tons that have 44psi max tires). Honestly the cost of fuel is still low enough (don't let politicans hear this!) that the savings of driving a compact car 10,000 miles a year you may only save $300 bucks if that. I went from a V6 S10 filling up with $25 bucks a week to this truck $40 a week, not a huge savings.