Crazy MPG gain claims here. Who isn't seeing them? - Ford Powerstroke Diesel Forum
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post #1 of 54 Old 11-09-2010, 06:35 AM Thread Starter
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Crazy MPG gain claims here. Who isn't seeing them?

I get tired of seeing the outrageous claims made here all the time. To be fair, maybe guys really are getting 17-20 MPG, huge increases (5 MPG or more), etc.

I'd like to hear from the guys that are seeing the same thing as myself. I don't see squat for increases. Maybe, 1-2 MPG or something, if that. It does seem like the gains should be more than that but it's not happening here.

Maybe I should get my truck lifted, run 35's, etc. [/sarcasm]

Amazing to see some of the numbers thrown out here. I know too many people in my area (now) and from my own experience to believe everything I read here.

Sorry, just had to vent. I really wanted to see substantial gains in the MPG department. That was the driving factor for my tuning decision to begin with. Had I seen a few guys posting what I'm posting I sure would have thought twice about the tuning business. Instead, all I see is unreal claims of MPG gains.

Anyone else in my shoes (and willing to admit it here!)
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post #2 of 54 Old 11-09-2010, 06:39 AM
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i am like you, i have only seen about 2mpg difference. maybe the guys getting 7-8mpg are trusting the lie-o-meter.
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post #3 of 54 Old 11-09-2010, 06:56 AM
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Iam only seeing 1-2 on the intersate and basically nothing around town. I do have 35's and a lift though.

2010 F-250 Cabelas Edition
Sct with Gearhead tunes, 4" afe dpf delete exhaust, leveled on 22's
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post #4 of 54 Old 11-09-2010, 07:06 AM
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I didn't really see much gain with my chip either. But I DID gain plenty of power and no loss of MPG. So with at least that, I can be happy with having more bang for the buck! lol

Oops... just noticed this was a 6.4L thread .


-'99 F250 7.3L PSD 4x4 (SCLB, 6-speed)
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post #5 of 54 Old 11-09-2010, 07:07 AM
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Originally Posted by 2010PSD View Post
Sorry, just had to vent. I really wanted to see substantial gains in the MPG department. That was the driving factor for my tuning decision to begin with. Had I seen a few guys posting what I'm posting I sure would have thought twice about the tuning business. Instead, all I see is unreal claims of MPG gains.
Then sell your truck and buy a 4 cylinder car. I mean seriously, your complaining about not getting GREAT fuel mileage in 3/4 and 1 ton trucks. These trucks are either one of two things for most people...work trucks or luxury vehicles, and in both cases good mpg is just a plus.

2001 Estate Green Metallic Limited Excursion w/ 7.3L and 2012 White Platinum Metallic Tri-Coat King Ranch F250 w/ 6.7L
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post #6 of 54 Old 11-09-2010, 07:19 AM Thread Starter
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Then sell your truck and buy a 4 cylinder car. I mean seriously, your complaining about not getting GREAT fuel mileage in 3/4 and 1 ton trucks. These trucks are either one of two things for most people...work trucks or luxury vehicles, and in both cases good mpg is just a plus.
That's a poor and worn out analogy here (sell your truck and buy a 4 cylinder car) or something similar. I have cars that get good mileage, poor mileage, and in between. That's not the point.

I really liked the idea of having a heavy truck and getting better (way better supposedly) mileage. Always been a fan of diesels anyway (going way back). The trucks shouldn't get "great mileage" and I really wouldn't expect them to. That said; all I see/hear around this forum is awesome mileage gains, etc.
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post #7 of 54 Old 11-09-2010, 07:24 AM
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I dont think anybody is complaining home boy. Just stating what kind of mpg's we are seeing with our spartan tunes and wondering why some are getting crazy numbers in the high teens and low 20's

2010 F-250 Cabelas Edition
Sct with Gearhead tunes, 4" afe dpf delete exhaust, leveled on 22's
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post #8 of 54 Old 11-09-2010, 07:30 AM
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Well I never hand calculated my mileage before I installed the Spartan stuff but the lieometer said I was averaging about 12. After the delete and tuner was installed I hand calculate 15 to 16mpg on the highway.

97' F-250 extended cab 5-spd, 4" AFE exhaust, Tymar cold air intake, guages, Modified IDM, Stage 2 injectors, Complete fuel system, TS 6 pos. chip, Southbend Con OFE clutch, D66 turbo - Gone

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post #9 of 54 Old 11-09-2010, 07:35 AM
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I mean, it's a 8,000lb+ truck, it's a work truck, I drive it in 4x4 up steep grades (see sig), I tow 6-8,000 lbs fairly regular and I'm happy with the 11mpg that I'm getting in stock trim, lol. I was getting 14mpg in my old F-150 unloaded and less than 10 loaded. Now matter how I drive my truck (loaded/unloaded) I'm seeing a 11mpg. I was seeing 12mpg until I put my 35" Trail Grapplers on. I just hate this stupid 25 gallon stock tank. I'm debating on tuning, or getting a Titan 47gallon tank. Getting under 300miles to the tank sometimes is just plain out stupid, IMO. Why didn't Ford put at least a 36-40 gallon tank on these trucks!?

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post #10 of 54 Old 11-09-2010, 07:46 AM
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Sorry your not seeing big gains. I've been tuned for about 5 thousand miles now stock 18's 3/4 ton cc/sb. This tank which has been all empty 95% hwy at 60-62 I got 520 miles on the tank. I have never gotten more that 27.5gal in the tank so that calculates too 19mpg I'm happy as hell. Milage goes down quite a bit if you do any city driving at all.
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