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Everyone has been talking about the MPG vs Axle Ratio and I've been looking at the towing charts and there's a 1-2,000lbs difference in capacity depending on trim. Well talked to some guys locally and I finally did the math.

This assumes 150,000 highway miles over the life of the truck which if you keep the truck 10+ years is not unreasonable to see that many highway miles, I focused on this because lower gears(high numbers) usually get better mileage in the city anyway.

Diesel @ 3.60/gal
@28mpg; 150k miles / 28mpg = 5357 gallons x 3.60/gal = $19,285

@27mpg; 150k miles / 27mpg = 5555 gallons x 3.60/gal = $19,998

@26mpg; 150k miles / 26mpg = 5769 gallons x 3.80/gal = $20,768 Total Difference $1,483


Diesel at $3.80/Gal
@28mpg; 150k miles / 28mpg = 5357 gallons x 3.80/gal = $20,357

@27mpg; 150k miles / 27mpg = 5555 gallons x 3.80/gal = $21,111

@26mpg; 150k miles / 26mpg = 5769 gallons x 3.80/gal = $21,923 Total Difference $1,566


Diesel at $4.00/gal
@28mpg; 150k miles / 28mpg = 5357 gallons x 4.00/gal = $21,428

@27mpg; 150k miles / 27mpg = 5555 gallons x 4.00/gal = $22,220

@26mpg; 150k miles / 26mpg = 5769 gallons x 4.00/gal = $23,076 Total Difference $1,648



If someone had shown me that math in the first reply we'd be done. ~$1,500 over 150K miles/10 years is something I can live with. I've completely changed my stance from getting 3.55s to now getting 3.92s
 

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Everyone has been talking about the MPG vs Axle Ratio and I've been looking at the towing charts and there's a 1-2,000lbs difference in capacity depending on trim. Well talked to some guys locally and I finally did the math.

This assumes 150,000 highway miles over the life of the truck which if you keep the truck 10+ years is not unreasonable to see that many highway miles, I focused on this because lower gears(high numbers) usually get better mileage in the city anyway.

Diesel @ 3.60/gal
@28mpg; 150k miles / 28mpg = 5357 gallons x 3.60/gal = $19,285

@27mpg; 150k miles / 27mpg = 5555 gallons x 3.60/gal = $19,998

@26mpg; 150k miles / 26mpg = 5769 gallons x 3.80/gal = $20,768 Total Difference $1,483


Diesel at $3.80/Gal
@28mpg; 150k miles / 28mpg = 5357 gallons x 3.80/gal = $20,357

@27mpg; 150k miles / 27mpg = 5555 gallons x 3.80/gal = $21,111

@26mpg; 150k miles / 26mpg = 5769 gallons x 3.80/gal = $21,923 Total Difference $1,566


Diesel at $4.00/gal
@28mpg; 150k miles / 28mpg = 5357 gallons x 4.00/gal = $21,428

@27mpg; 150k miles / 27mpg = 5555 gallons x 4.00/gal = $22,220

@26mpg; 150k miles / 26mpg = 5769 gallons x 4.00/gal = $23,076 Total Difference $1,648



If someone had shown me that math in the first reply we'd be done. ~$1,500 over 150K miles/10 years is something I can live with. I've completely changed my stance from getting 3.55s to now getting 3.92s
I've been saying the same thing all along, just without the flashy "facts" and "figures". When Motor Trend posted the fuel numbers of a 4x2 with 3.55s at 28 MPG vs a fully loaded Laramie Crew 4x4 WITH RamBox and Air Suspension at 26 MPG. That basically means that the worst you can do is 26 MPG, but by having the RPMs a little higher for a little longer during the acceleration process could prevent those pesky recharges everyone is worried about. It's all going to be put to the test soon enough because I'm going over my rig with a fine toothed comb.

Nice info though, thanks. We should be friends, wanna play trucks?
 
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