Observed fuel mileage on the 5.7 Hemi

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Oct 4, 2010 | 01:56 PM

#21

USAF1

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Joined: May 2010

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From: Exeter, CA

Quote:

Originally Posted by it's all dodge

USAF1, what kind of highway speeds you talking? I have the same truck. Really thinking of a tire change from the 275/70 r 17 GOOD YEAR AT/S tires to 265/70s, loose some rotating weight...would be alot better in town I think, and might more then balance out at speed by MDS staying engaged more. I know even if I managed to trade or sell the TRX4 tires, no matter how much better it does, I would still be $$ behind. I guess the TRX4 tires can last a real long time, and trailer tow good but they are more tire then I need, and I'm just wondering what if?

My highway speed is normally 70 mph. My overall mpg includes lots of mountain driving as I have a cabin at 5300 ft (live at about 600 ft) and go up at least one weekend out of the month, sometimes two. I have the std 17inch all terrain tire (Goodyear Wrangler) that the truck comes with. I keep them inflated to 39-40 psi., a tad over their recommended 37 psi.

Oct 4, 2010 | 03:57 PM

#22

it's all dodge

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Joined: Jan 2009

Posts: 87

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From: harrison, ar

Thanks, I live in a hilly area myself. I'll probably drive it to Virginia area next year from Arkansas...see what it does on a highway trip @70. Any 10% alcohol in the fuel there? That really is pretty good, considering the 3.92 gears and 47/48 pound tires

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