What is the likely MPG loss going with 33s?

Hi, So far with my new Taco 4x4 DC I am getting about 19 MPG with the mickey mouse 245s. What is everybody getting with their 33's ?

I'm wanting to get either a set of 285 BFG ATs or some 285 Nittos and I was wondering if I go with these 33" tall tires, what is my likely gas mileage drop?

Sorry, I know this is probably asked/posted 100 of times but I couldn't find a good place where many people gave different inputs.

Thanks!

 

Too many variables. Your driving style determines alot of it. I only lost .5 off my average going from 265 to 285 tires.

 

Average is 2 mpg. I get 17 in my DC 4x4 Off Road Auto. I expect 15... 16 would be great.

 

Ya, I try to drive it pretty conservatively, I'm not a lead foot. The problem is, I drive about 60 miles a day between work and day care (mostly high-way), so the MPG will affect me over time. But, I think the way these Tacos look with 33's are sweet. If its only 1-2 mpg loss, then I may go for it. I have heard numbers all over the board.

If you think about the math and science behind it, and you don't factor in the weight of the new tires, it almost makes sense to me that once the truck is going at a good speed, the bigger tires will cover more ground at the same RPM .... thus resulting in better mileage to hopefully even out some?

Wishful thinking?

 

This is exactly what I'm thinking ... I was set on 285's and am about to make the purchase in the next few weeks but am now worried from all this MPG talk on here. I drive like an old lady so I doubt it will affect me much but I have always had the same thought process as what you just said. Anyone have comments on this?

 

33's and high 18mpg here. I would definately say driving style.

 

2mpg all day - everywhere.. and here comes the winter gas..for another Loss , damn ,damn ,damn.

Now a diesel, with all that torque would probably not decline as bad...come on YOTA diesel hilux for the WIN

 

I think there might be a difference in manual vs automatic as well (taller gearing). I dropped less than 1mpg as well. They make 1st gear more usable.

 

I wasnt to worried about my MPG loss goin with the 33" Mud grapplers on my truck.

You gotta pay to play so if your that worried about MPG get a civic.

 

I get almost 18 on 33x12.5s...definitely has to do with driving style.

Wind resistance and pavement friction don't make a difference when you are only jumping up 2" in height and 1" in width.

 

i have the 285 bfg at's they are great. i get between 16 and 20 mpg with an 18 average. Most people forget to compensate for the larger tire they are actualy going farther than the odometer says you are. I really dont drive hard at all on my truck.

 

I run 33's on my '96 3.4 L and I get 18.6 mpgs.

 

I have gotten as high as 21mpg taking into account the difference in tire size. Driving style, and environment make the difference. up and down a lot of hills, or level ground. Heavy traffic or cruise control.

I have made some notes in my fuelly log. Check them out.

 

I get 16.5-17mpg mixed driving and 19-19.5mpg on the highway. That's with 35x12.5R18 KM2's and regeared to 4.56.

With 33" Toyo At's I averaged only .5mpg more than with 35's. After I got 4.56 gears my mileage went down on the highway from 19.5-20mpg to 18-18.5mpg.

 

My last tank on factory 245/75R16 was 17mpg.

My first tank on Goodyear MTR/Kevlar 285/70R17 was 14mpg.

Thats with a std cab 4cyl 5speed. It's still a new truck I'm having fun with, so I'm still going a little heavy on the skinny pedal.

Hey, I always wanted to say this: "your mileage may vary!"

 

My DC4x4 went from 21.5 with hiway tread 245s down to 18-19 with 265/75/16 duratracs, so I would guess going up to 285s would drop into the 16-17 mpg range. I drive like a grandma.

 

I lost 4 mpg going from 265/65/17 to 33x12.50 r17. I was consistently getting in the 18mpg range before the 33's, after I am averaging 14 +/- But pretty constantly getting 14. I can get 220 miles from a tank, according to the odometer, probably really going 235 miles due to the calibration being a little off. I also have the full k&n intake, and 40 series flowmaster.

 

If the biggest reason you are going to the 285s is for looks, you might want to consider just using 265/75-16's and some spacers. A bit bigger tire and spaced out from the hub make for a more aggressive look. When I went from the 245s to the 265s, I did not notice any significant drop in mpgs. I also upgraded wheels that went from the stock -15 offset to a +25 offset. This essentially spaced the tires out about 1 1/4" from stock.

 

When I went from 265/70-17 up to 285/70-17, my mileage went from 19mpg average to 15mpg average. But I also have MT, I'm sure AT's would give better results.

 

This basically is my exact same situation and exactly what was hoping to hear. I too feel like I drive like a grandpa... and I'm getting about 21 with the mickey mouse 245's.

I really want to get a 6" lift... and run 33's (maybe a hair larger) but I don't mind losing 2-3 mpgs but I don't want to go lower than 18mpg.