I have a few things...
Miles per tank?
- Thread starter kylebacc
- Start date
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Yes, I did (4.56) and I measure distance on GPS, not odo. Don't take me for that dude 
I did not, good point. Whats the best way to do that?
Figure out how much bigger your current tires are (percentage of OEM) and adjust math accordingly.
For example, with 285/70's you're traveling 7% farther than your odometer indicates (stock 265/65R17's are ~30.6", your tires are ~32.7"). 16mpg from miles/gallons becomes 17mpg (because actual miles = indicated miles * 1.07).
In addition to what @JLee said, you'll need to adjust for any re-gearing. Re-gearing to a shorter gear (4.12 or 4.56) will increase your RPM and will counteract the larger tire size. For example, 16*(1.07)*(3.73/4.56) = 14
Gearing is factory. Thank JLee/Dharma, I appreciate the information. I cant believe I wasn't thinking about adjusting this whole time for 285..at least I should be getting slightly better gas mileage that expected and not worse.
OK, im gonna get strung up....my absolute best tank was last year, bone stock, couple months after I bought it. Flat ground, driving like grandpa on the hwy down to the beach. 65-70 most of the way. 423 miles, light had been on for about 10 miles because we missed an exit. I put about 22 gallons in it. Two occupants, lightly loaded with a couple of suitcases and hanging clothes.
If im highway driving, I can average 18-19 (unless I have my foot in it)... In town, it drops to 15 or so.
If im highway driving, I can average 18-19 (unless I have my foot in it)... In town, it drops to 15 or so.
This pretty much matches my experience with stock. I watch my mpg religiously.
So I worry about the drop when I lift, regear and put on bigger tires, and add other heavy add-ons.....hoping it won't be to much. I am hoping for 15-16 (freeway) after mods...or about drop of about 15%
I just mounted up a set of Cooper ATP's in 265/70/17's, and might have lost 1/2-1 mpg. I was also driving back from Charleston, SC in the noaks ark flooding rains on Monday, so that also contributed to less gas mileage.
I'm trying to keep this one as relatively stock as possible, but man, the hidden winch bracket looks SOOOOOO tempting. And I've got a 12k winch still sitting in a box waiting for a home. LOL
I'm trying to keep this one as relatively stock as possible, but man, the hidden winch bracket looks SOOOOOO tempting. And I've got a 12k winch still sitting in a box waiting for a home. LOL
I will have my tank numbers concrete for 35s, 4.56s and oodles of weight this weekend as I cross the country to go from ATL to Moab.
I want to save money and get better mpg's as well but I've got a 6k pound SUV with all wheel drive and 35's and armor. So I didn't buy it for the gas mileage. Some of you guys are very intense with the mileage for a vehicle that wasn't impressive in stock format. Also not sure $2k on regearing is worth the difference in mileage. Dan did it I'm sure for better acceleration and wheeling. I shrug it off when I get poor mpg because I never bought and built it for gas mileage
Correct!
I get about 17mpg on my 2006 stock GX mixed driving probably 2/3 highway no babying it. Regular gas works just fine. If premium is not too expensive I get that every now and then.
So to improve MPG on a built rig has any member noticed that adding a air intake or aftermarket muffler helps?? Obviously you do this for more horsepower but if you drive gently would you experience slightly improved MPG???? Is a snorkel considered a air intake or no? And what would be the quietest muffler to upgrade to for performance and fuel economy? Thanks for the input.
No upgrade improves mpg better than PM. Redo the bushings, driveshafts, CVs, bearings, etc. Tune and maintain the engine. Get the transmission drain and fill cycle going. Maintain your fluids. Swap coil packs and plugs. These will help more than any mod. Most of the trucks I see going new sales with 130k+ need the above more than an intake to improve the mpg.
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