does re gearing help with MPG's?
 

I know, very newb question. I'm just killing my wallet with stock 4.10's and 33x12.5x15. I know the wider tires have a lot to do with it. I was running 31x10.5x15 and getting about 16 around town, with same gears Im getting about 12 to 13. My plan is 35's no bigger, and 5.29 gear ratio. I'm not going to re gear until I do a SAS this summer.

Fresh rebuild with about 1000 miles, new plugs, wires, cap, rotor, fuel filter, and 5w 30 synthetic etc...

This is my daily driver, but I wheel every other day. I know there is a point where a 4x4 and good gas mileage don't really go well together, but its a 22re. This dumb ass sold his honda civic for this last year....lol

I would be happy with 15 to 16 around town again.

It will help A LOT!! You will not regret it one bit.

Your MPG average is down because you wheel every other day. You may actually drive 18 miles per gallon on the street, but your average will be lower because of the wheeling- low speed, 4x4, skinny pedal here and there, pulling your friends out, idling for extended periods of time.

My '85 did best with 33s w/ 5.29 gears. Later I switched to 4.88s and the MPG dropped about 10% (both corrected).

And with the 4.10s and 33s, are you correcting the actual miles driven for the larger tires? If not, you are actually driving about 18% farther than the odometer registers with the taller tires.

I have taken that into account. there has been times when I haven't for a week or two, that where I get my around town mileage. I dont calculate it if I have been in 4wd or 4 lo

theres just a spot on my way home from work that I like to hit after work a couple times a work week

Ha! geez. didn't even think about that.

I ran out of gas, put it 10 bucks( 2.5 gallons) then ran out again after going 30 miles. about 12 mpgs( I know, bad on the fuel pump, but it was the day before pay day and I ran out of change...). Thats also about the same reading I get when I fill up all the way, keep track of miles, then fill up again and divide the miles by how many gallons I put in again.

So I'm actually getting maybe 15? Im horrible with math. whatever the 12 mpg's plus 18 percent is...

12 uncorrected is about 14 corrected. Just multiply MPG by 1.18 to get the actual figure.

Plus, if you are on the highway, realize that you are also driving 18% faster than the speedo says, so higher speed = more load on engine = less MPG. So at 65 indicated, you are actually going around 76-77. I know on my '85, at 65 I'll get around 18 (33s and 4.88s) and if I keep the speed to 55, I'll get 20 or a little better. When I ran 5.29s, I used to get like 20-22 @ 65+ and maybe 22-24 @ 55 or so.

always great information roger, thank you