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I have a 2000 crew cab short bed 4x4 powerstoke with 18" wheels and 325 by 33" tall tires and 3:73 gears. The mods I have done to it are the napa filter, dp tuner chip with the 100 and 140 tunes, 5" stacks with a stock down pipe, and a bd tranny with their 4r100 converter. My dilemma is I get almost 16mpg doing 75mph spinning 2150rpms unloaded and almost 11mpg doing 55mph spinning 1700rpms towing a trailer with a rhino on it and a combined weight of about 3000 pounds. And around town I get roughly 12 to 13 mpgs driving easy for the most part. So my question is with this given set up, I think I should be getting better mpgs and even if I should or shouldn't, how can I get better? I want to ditch the stacks because they just draw unwanted attention so what would be the best exhaust setup for mpg's if it were dumped out the side behind the rear axle like the stock setup. Thanks in advance.
 

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Those numbers sound pretty dead on to me. IMO anything over 2000rpm is going to suck fuel. I get my best numbers with my chip on the highest setting, keeping rpms under 2grand, light on the foot, and coasting to stops
 

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I second that. Keep the RPM's under 2k. Diesels become more efficient with the more power we can tweak out of them - within reason - so with that in mind - the higher HP settings will generally allow you to reap better fuel - problem is - more power is more fun and the go pedal tends to get a bit heavy. If you can control the weight of the go-pedal - and keep the RPM's under the 2k mark - you will see an increase most likely. Good luck lightening that go-pedal! haha (I try - but fail miserably sometimes - but enjoy the rush!)
 

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Discussion Starter #4
Wow thank you for the quick replies. I understand that I'm doing pretty good but are you saying i'm just going to have to accept that unless i have a manual single cab, I won't be able to get close to or over 20 at least on the freeway? Thank you again
 

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Tire pressure plays a big role too, I'd go as full as they say you can fill them if you can stand the ride. You should be able to get 18.5+ highway. I can get that with a canopy and it full of camping gear, AC on, 60-70 mph and getting on it now and then in the summer time. Year round average>? Still around 16.5 or so.
Drive it slow and get better MPG, no doubt!

Scott P
 

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Tire pressure acceleration is a big one.It takes me a mile before I am at 55.Set the cruise at 62.I really don't care if someone is on my butt.They don't have to pay my fuel bill.
Exactly people get mad all the time at me. They ain't gonna move me so go around lol.

Ive also always been told to make sure the hubs where unlocked. :dunno: if this helps or not.

I believe running stock tire configurations would give you better mileage to but I dunno prolly not worth it.
 

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I know w/my TS chip on the 100 horse setting I get the best mileage. I also have fold up cover on the bed as well. I seem to get the best mileage running 1900-1950 rpms. If I get over 2100 I can watch the fuel gauge drop! One more thing that might help ya, get rid of the stock down pipe, go to a 4" if you have a 4" exhaust or at least a 3". Good luck to ya
 

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Check...

Fuel filter
Tire Pressure
Up-pipes (if they are leaking you will lose mileage)
Your BRAKES (if they are hanging up that will create some drag)
 

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seems a little low to me, but all trucks are different, I pulled about 3500lbs to the deer lease cruising about 65-70 and got 15 on the highway, thru town with that load haha it dropped to about 11
 

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[14.31 @ 93.X mph 8950 lbs
Iraq War Heroes Tribute Page
I finally looked at that page. Sad story. I hope everything goes well for them and their families. Three flags for one man is pushing it
 

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Those numbers sound pretty dead on to me. IMO anything over 2000rpm is going to suck fuel. I get my best numbers with my chip on the highest setting, keeping rpms under 2grand, light on the foot, and coasting to stops
I agree with Sam. I don't do many highway miles, but I experimented a bit a couple of weeks ago while on the road to SSS in Winston Salem. Best fuel economy seems to be my Street tune on the open road. EGTs are a little higher than on other tunes, but not high enough to worry.



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