Easy way to increase gas mpg

[SizzleChest]

does the actual weight of the tire really make that much of a difference? i would think the friction of the wider tire making contact with the ground would cause a more substantial drop in mileage than the actual weight of the tire.

i have 33x9.5s with 4.88s and a 22RE and get 550kms (342miles) per 65L (17gal) tank around town which is what the ODO shows and after re-gearing, i think the speedo is on the low side which would mean the ODO would be as well, correct?

 

[2ndGenToyotaFan]

does the actual weight of the tire really make that much of a difference? i would think the friction of the wider tire making contact with the ground would cause a more substantial drop in mileage than the actual weight of the tire.

Could be, but the larger mass the truck has to get turning, plus the larger diameter of that mass is going to play a role as well. Think of spinning a bike tire vs. a 33 MT. Getting the 33 going is a lot tougher.

i have 33x9.5s with 4.88s and a 22RE and get 550kms (342miles) per 65L (17gal) tank around town which is what the ODO shows and after re-gearing, i think the speedo is on the low side which would mean the ODO would be as well, correct?

Yes the Odo will be lower if your speed is lower. Those numbers you posted say you're getting around 20 mpg... And if your odo is low, you are getting better. That's very impressive for around town, if that is all converting correctly. Do you drive it till it runs out? 342 is a long way.

 

[Jukelemon]

How did you get a 17 gallon tank?

I just broke into the 24's on the last tank ( : Damn, what a difference tires make.

I got to say, 24 mpg in a 92 4x4 with 175k miles is pretty impressive. I am happy.

Gas just hit 4/gallon today for Reg. Diesel at 4.70/gallon.

In regard to bigger tires, it was/is a loss across the board with stock gearing. It is harder to get moving and harder to stay moving in my opinion. Like I mentioned before, going back to smaller tires is like adding 25 hp to what you are used to.

I am shifting into 5 at 45-50 for the most part and the truck pulls well. Granted, I am in KY and not out West/higher elevation.

 

[SizzleChest]

Yes the Odo will be lower if your speed is lower. Those numbers you posted say you're getting around 20 mpg... And if your odo is low, you are getting better. That's very impressive for around town, if that is all converting correctly. Do you drive it till it runs out? 342 is a long way.

i ran it pretty low to see exactly what kind of mileage i could get but i try not to make it a habit. i got 650kms to a tank all highway once, i literally was running on fumes to the gas station. the engine choked out and i started it back up and was able to drive for another 30 seconds before it choked out again and i coasted to the pumps.

 

[killer1954]

my stock '85 mini (over 200k miles on it) with stock rims/tires gets between 20(city) and 24(highway)mpg. That's up to 350 miles to the tank with a gallon or two to spare. I haven't taken it down to the fumes yet. The owner's manual says 17.2 gallon tank and I believe it. I've put over 15 gallons in at least once.

 

[subzali]

I have topped out at 32 mpg on my '91 2wd 22R-E 5 spd extended cab. That's with coasting down hills etc. I went with bigger tires (and BFG A/Ts too, now that I think about it) - 27 x 8.50 and they rob power and mpg, though I have not corrected for tire size so maybe I have been getting more distance than I thought, but not much?

It has been dropping steadily over the past few years as my muffler has been going bad, I was down to as low as 20-22 this past winter, I replaced the muffler/tailpipe last week and now I'm back up to 27-28 Why I didn't do that earlier is beyond me. I'm almost through this set of tires, so I'll be switching back to some lighter weight street tires and see what I start getting again. I have steel wheels though, maybe I should look into aluminum? I'm trying to stick it at 55 for most of my driving too, see what that does.

Just got 29.5 mpg yesterday on about 280 miles of driving in the Colorado mountains. It's all about driving style! Too bad it's not 4x4...

 

[bkg]

Get rid of the damn mudders!!

With my 31x10.50 BFG mudders, I would average, consistently, 19mpg. I removed them about a month ago and replaced them with some 235/15's and my mpg jumped to 22.6 mpg on average. Not bad fellows. Gives me another 50 or so miles on the tank.

Just for fact's sake, the timing chain replacement did nothing to increase mpg. I thought it would a little but no.

that has less to do wtih the type of tire and more to do with size... 31's are 2" taller than your 235's..

 

[Mike C]

When you run a larger then stock tire size, you need to figure out how far off your odometer readings are too. I've compared my GPS distance to the odometer distance on a couple 100+ mile trips, always with the same results. So when I top off the gas tank, I multiple my tripometer by 1.13 to get the actual distance since my last fill.

 

[Toyrunner87]

I have an 87 4runner with 35" mtr's and 5.29 gears. It's a 22re 5sp and i get about 17 mpg combined. And I will drop it in 5th as low as 40 MPH...it really isn't that much taller than 4th.