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Discussion Starter · #1 ·
HI,

I am curious what hiway and city milage you guys are getting on you 2003-2004 3500 4x4 trucks. Right now i seem to get about 14 in town and 15-17 on the highway. Its prettty much stock except for a BHAF. Has 3.73 grears

Thanks

God bless...

Mark
 

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Discussion Starter · #2 ·
HI,

I forgot to mention it has stock 17 inch rims and firestone tires.

God bless...

Mark
 

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My 03 with the mods in my sig averages around 19 MPG on the highway with the Smarty on SW5. Thats going around 72 MPH usually.

I've seen as high 21 MPG on the highway, but usually get around 18-19 MPG. Have gotten as low 14-15 MPG with a lot of wind or going over 80 MPH.

I usually see 16-17 around town.

I've seen as high as 22-24 MPG on slower 60 MPH two lane road.
 

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Discussion Starter · #5 ·
HI,

Man I was hoping for more than that milage wise... Anybody else have any different results?

Thanks

God bless...

Mark
 

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03 average is 19-20 highway 15 in town. I live in a 10.500 size town 6 stop lights In the town I only go throw 4 of them the most of the time.When pulling on interstate at 60 with 23.000lb I run 15.2 down to 14.2 she is stock except for air defector for the fifth wheel I put an extra air in let in the bottom of the stock box and ran a flex hose behind the front bumper with a screen boor screen on the end run the stock air filter that came with the truck. DO NOT run in deep water or snow.
 

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Mine has 4.10's and a 6 speed with 35's. The overhead shows high 18's most of the time. I don't get into it much. My first week it was in the low 15's though :peelout
 

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its a 8500 3 truck what do you expect only the older ones get better mileage
 

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with 35's 4.10 gears and the mods in my sig, im gettin 20-21 highway runnin 70-75. city i dont know cause i might drive 2% of total miles. i do know that 1800 rpms seems to get the best fuel mileage in my truck at least
 
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