Poor MPG!
10-15-2013, 05:36 PM
#21
for fastening fabric
you have bigger, heavier tires. if your current rubbers are LTs, that just adds more weight over the P tires it came with.
he probably removed the mods it had because he wouldn't get his money back out of them when he went to sell the truck, so he's likely selling them on the side.
also, with 275/65 compared to 275/55, the tire is taller, has a larger circumference, and the computer thinks that the truck is travelling less distance than it actually is, which will definitely impact the computer's accuracy.
the truck also looks leveled, which affects aerodynamics, and not in a good way.
he probably removed the mods it had because he wouldn't get his money back out of them when he went to sell the truck, so he's likely selling them on the side.
also, with 275/65 compared to 275/55, the tire is taller, has a larger circumference, and the computer thinks that the truck is travelling less distance than it actually is, which will definitely impact the computer's accuracy.
the truck also looks leveled, which affects aerodynamics, and not in a good way.
10-15-2013, 09:23 PM
#22
Member
Thread Starter
I need to get a hold of the ford dealership here in town and just see how much it would cost to check and see what tire size the computer is set at. I like the tires i have but i think they are more of wallet killer than anything. i found some replacement tires on tirerack that i think will do fine, and ill check the local discount tire store
10-15-2013, 10:01 PM
#23
Senior Member
I need to get a hold of the ford dealership here in town and just see how much it would cost to check and see what tire size the computer is set at. I like the tires i have but i think they are more of wallet killer than anything. i found some replacement tires on tirerack that i think will do fine, and ill check the local discount tire store
If you're even thinking this hard about the mileage, it makes me wonder if you bought the right vehicle for your needs. It's one of the least economical vehicles to use as a daily driver that you can buy. You own it now, it looks like a nice truck, my advice is drive it and don't keep track of the mileage it will just annoy you.
10-15-2013, 10:07 PM
#24
Senior Member
In mine i get around 13 in the city with a heavy foot. If I take my time and go slow I can get 14 in the city. Now on the highway I can get 22 if I have cruise set to 60 and on level ground. If you go over 70 in these trucks it just kills the milage. Mine truck is a 09 with 61000 miles on her. She is a stock 2 wheel drive and that helps some. Also i have done the gotts mod and I have full exhaust plus a custom tune from mike at 5 star. But like everyone said its your right foot that makes the most different. I know that I have learned to become more calm when driving. The older I get lol.
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Royderjd (10-15-2013)
10-15-2013, 10:08 PM
#25
Member
Thread Starter
If you're even thinking this hard about the mileage, it makes me wonder if you bought the right vehicle for your needs. It's one of the least economical vehicles to use as a daily driver that you can buy. You own it now, it looks like a nice truck, my advice is drive it and don't keep track of the mileage it will just annoy you.
10-15-2013, 10:19 PM
#26
Senior Member
-GunSlinger- - The aspect ratio doesn't determine the width of the tire that is the first number. So if both tires are 275s then they are the same width ...
gDMJoe - The aspect ratio of the tires (65 versus 55) makes the contact patch of the of the 65 series smaller via the difference in thread width: 8.7" versus 9.5". *The length is probably near the same.
And just so's you know - sectional width (usually) does not match tread width ...
10-15-2013, 10:23 PM
#27
Kickin it
275/65 and 275/55 will have such a small impact on your MPG that you will be wasting a lot of money for something dumb. Chances are the computer isnt tuned to the truck. I know when I put my 35s on it said I was getting 8.1 mpg, once I tuned it and did the same driving, its been sitting around 13 in city, 18 on highway.
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Royderjd (10-15-2013)
10-16-2013, 12:42 AM
#28
Senior Member
mikeyfitz - 275/65 and 275/55 will have such a small impact on your MPG that you will be wasting a lot of money for something dumb. Chances are the computer isnt tuned to the truck.
However, don't minimize the impact of a greater contact patch (+6.5%) and the possible (?) increase in wheel weight due to a greater load range and load index of the tires. *Just check-out the example tire spec's that I posted above ... 13Lbs / tire difference between the P and the LT.
Just like maintaining the proper PSI, every little bit adds-up.
.
Last edited by gDMJoe; 10-16-2013 at 12:46 AM.
10-16-2013, 12:58 AM
#29
This is a pickup truck, not a Prius. Stop worrying to much about MPG.
10-16-2013, 01:41 AM
#30
Kickin it
Agree about the PCM not reflecting the actual wheel diameter and correcting that alone would bump the MPG to 14.
However, don't minimize the impact of a greater contact patch (+6.5%) and the possible (?) increase in wheel weight due to a greater load range and load index of the tires. *Just check-out the example tire spec's that I posted above ... 13Lbs / tire difference between the P and the LT.
Just like maintaining the proper PSI, every little bit adds-up.
.
However, don't minimize the impact of a greater contact patch (+6.5%) and the possible (?) increase in wheel weight due to a greater load range and load index of the tires. *Just check-out the example tire spec's that I posted above ... 13Lbs / tire difference between the P and the LT.
Just like maintaining the proper PSI, every little bit adds-up.
.
In the end, its a big truck, not going to get great gas mileage lol
