I think it's off, but I have 5.13's, 37's and I'm getting 300+ to a tank. Can anyone help me out with what kind of gas mileage I'm really getting?

Brenton

 

have you ever reset your truck to the 5.13s and 37s? what was your original ratio and tire size?

 

Yea, your milage may be off? anyone have a GPS you can borrow?

I'm on 4.88 and 35 and with stock speedo mine is way off.

I'm getting about 16 right now, on the hwy I'm getting a lot better though, but not city.

 

mileage is off homeboy..

 

If I'm doing 60, I'm really doing 55.

My stock tires were 235/75/15 with 3.55 gears.

Brenton

 

damn mines not off that much lol

if it says 70 im doing 77 or so.. i would let you barrow my gps but were kinda far away

 

I'll see if I can't get my hands on a GPS.

Brenton

 

whats the GPS got to do with it? can that help to tell gas mileage or what?

 

2 things you can use GPS for

1. see how accurate your speedo really is
2. use the "trip" function on your GPS to calculate how many miles you REALLY are going to a tank, use that number instead of whats on your dash...it is different I'd say 99 percent of the time

 

good thing the girlfriend has a garmin then haha Ive always wondered my exact miles

 

my GPS tells me with my 285/75r16 tires when i'm doing 65 i am doing 70 and i am about 5mph off with just my little size increase and running 4.10 gears.

 

mine is about 6mph off most of the time.

i love my garmen nuvi 200.

 

I adjusted mine with my bama and I'm still about 1mph off at 40 and it's almost dead on at 65.

 

my Ranger was way off with 3.73's and 33's. When I went to 4.56's and 35's it was dead on.

 

Its funny cause mines dead on with bigger rubber