3rd Gen High Performance and Accessories (5.9L Only) Talk about Dodge/Cummins aftermarket products for third generation trucks here. Can include high-performance mods, or general accessories. THIS IS FOR THE 5.9L ONLY!

Increase fuel mileage with performance upgrades?

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Old Apr 16, 2008 | 09:03 PM
  #1  
Moobesor's Avatar
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From: Upstate New York
Increase fuel mileage with performance upgrades?

When I started building my truck last year I was surprised by the mileage increase every performance product stated it accomplished:

injector nozzles -- 1 to 3 MPG increase
tuner box -- 1 to 4 MPG increase
Air Box -- ?
Larger exhaust -- ?
Aftermarket turbo -- ?
Water/meth injection -- ?
Programmer -- 1 to 4 MPG increase
Torque converter
Co-pilot
Fuel additive

Every one of these items claims better mileage.

I do have much more power and love it, but I do not see a bit of mileage increase. Yet, I don't see a decrease either. Good enough for me.

I have a problem keeping my foot out of the boosted performance, though. Perhaps when that dies down I will accurately measure MPG.
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Old Apr 16, 2008 | 09:19 PM
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If they all played together like they claim they could, you would get around 40 mpg. Since that's not going to happen, find a small, scrap piece of 2X4 and wire it to the bottom of your accelerator peddle. That will increase your mileage and it's virtually free.
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Old Apr 16, 2008 | 09:26 PM
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From: Baker, MT
Originally Posted by Totallyrad
find a small, scrap piece of 2X4 and wire it to the bottom of your accelerator peddle. That will increase your mileage and it's virtually free.
Way too funny!
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Old Apr 16, 2008 | 09:35 PM
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From: Birmingham, Alabama
But true!
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