I'm getting horrible mpg on my 06 4.0 Prerunner

[TacoBOB77]

So ever since I put the 285's on 17" wheels and the 3" lift and 1.25" spacers I get bad mpg to the point where I don't want my Tacoma as a daily driver does anyone know how I could improve this I'm possitive I'm getting 15 or less mpg even on highway I used to get about 250 miles on a full tank now it's a full tank plus 3 quarters of a tank to do the same milage not sure what's going on here or it's normal but I'm tired of spending so much time at the pump any input would help thanks guys[emoji111]️

 

[Bojangles]

So ever since I put the 285's on 17" wheels and the 3" lift and 1.25" spacers I get bad mpg to the point where I don't want my Tacoma as a daily driver does anyone know how I could improve this I'm possitive I'm getting 15 or less mpg even on highway I used to get about 250 miles on a full tank now it's a full tank plus 3 quarters of a tank to do the same milage not sure what's going on here or it's normal but I'm tired of spending so much time at the pump any input would help thanks guys[emoji111]️

well, u shot urself in the foot....plus winter gas
dump excess weight, run higher psi (within reason), dont use load range E tires unless you need them, drive slower.

change sparkplugs?
run synthetic oil?

change rear diff fluid for synthetic?

DONT run your tank so low very often.

Run the lowest octane you can to save money

 

[Bojangles]

BTW, your prerunner should have been able to pull off 320 miles per tank before and just barely have the light come on.

maybe your 02 sensors are going out, or worse the cats?
clean your MAF sensor too

 

[Bojangles]

I thought you had an 05?

 

[Bojangles]

lets not forget you may have your mileage wrong................... check your speed vs speedometer with gps or something.

 

[Dec1968]

What was the tire size before? If you aren't compensating for tire size difference, I would be willing to bet your mileage didn't change.

https://www.tacomaworld.com/tirecalc

 

[kp.taco]

BTW, your prerunner should have been able to pull off 320 miles per tank before and just barely have the light come on.

maybe your 02 sensors are going out, or worse the cats?
clean your MAF sensor too

I wish I could get 320 miles per tank [emoji852]

 

[Bojangles]

I wish I could get 320 miles per tank [emoji852]

Yeah and I wish I could run ethanol free 87

 

[OR17TRD]

I wish I could get 320 miles per tank [emoji852]

I get about that many miles on a tank.
Ask me how big my tank is

 

[kp.taco]

I get about that many miles on a tank.
Ask me how big my tank is

Probably like 30- 35 gallons.? Lol

 

[OR17TRD]

Probably like 30- 35 gallons.? Lol

38

 

[kp.taco]

38

Damn!

 

[Dec1968]

So what size tires did the truck come with stock?

 

[Bojangles]

So what size tires did the truck come with stock?

265/65/17 came on sport rims which are in his avatar.
Truck may not be a sport tho, so that's all I got.

 

[TacoBOB77]

well, u shot urself in the foot....plus winter gas
dump excess weight, run higher psi (within reason), dont use load range E tires unless you need them, drive slower.

change sparkplugs?
run synthetic oil?

change rear diff fluid for synthetic?

DONT run your tank so low very often.

Run the lowest octane you can to save money

I did change the spark plugs to ngk and also changed the diff fluid since I have a new rear end and toyo At tire and before I had 265/70/16 now the 285/70/17

 

[TacoBOB77]

BTW, your prerunner should have been able to pull off 320 miles per tank before and just barely have the light come on.

maybe your 02 sensors are going out, or worse the cats?
clean your MAF sensor too

I will clean the sensor my gas meter is not working I track the milage with my trip odometer when I fill the tank pump stops at 3 quarters

 

[TacoBOB77]

lets not forget you may have your mileage wrong................... check your speed vs speedometer with gps or something.

Looks like my speed is correct

 

[TacoBOB77]

38

Wow

 

[TacoBOB77]

So what size tires did the truck come with stock?

265/70/16 it's a 2006 Prerunner

 

[TacoBOB77]

265/65/17 came on sport rims which are in his avatar.
Truck may not be a sport tho, so that's all I got.

It's a SR5 Prerunner I put the sport wheels bc they look nicer and newer looking