5.13's+37's=18mpg? - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 05-16-2008
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5.13's+37's=18mpg?

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
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Old 05-16-2008
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have you ever reset your truck to the 5.13s and 37s? what was your original ratio and tire size?
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Old 05-16-2008
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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.
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Old 05-16-2008
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mileage is off homeboy..
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Old 05-16-2008
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If I'm doing 60, I'm really doing 55.

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

Brenton
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Old 05-16-2008
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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
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Old 05-18-2008
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I'll see if I can't get my hands on a GPS.

Brenton
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Old 05-18-2008
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whats the GPS got to do with it? can that help to tell gas mileage or what?
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Old 05-18-2008
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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
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Old 05-18-2008
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good thing the girlfriend has a garmin then haha Ive always wondered my exact miles
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Old 05-24-2008
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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.
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Old 05-24-2008
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mine is about 6mph off most of the time.

i love my garmen nuvi 200.
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Old 05-25-2008
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I adjusted mine with my bama and I'm still about 1mph off at 40 and it's almost dead on at 65.
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Old 05-25-2008
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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.
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Old 05-25-2008
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Quote:
Originally Posted by lifted97ranger View Post
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
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