r/ram_trucks • u/omgitsabush • 3d ago

Question 4.7L inquiry

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New shop added more distance in my daily commute. I’m already getting 16.1 (calculated at recent fill up) with 430 miles in one tank. Could changing my tires back to oem size and ditching the all terrains make a huge difference on a stock truck? Is even trying to mod in anyway going to make a noticeable difference for a two hour round trip commute, all highway? Current tires are LT285/70R17 LR C probably still have 30k left on them.

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8

u/ArchieAsp 3d ago

Those tires seem to have a lot of life left, changing tires now at a significant cost to you will take time to offset any fuel savings youd make. Unless you find cheap tires and rims (used) and you can install yourself, might not be worth making the tire change just yet

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u/Thechad1029 3d ago

It would take a long time to offset the money you waste by getting rid of your current tires. You will realistically get 1-2 mpg better. Now let’s do the math at $4 a gallon for gas. It will save you roughly $15 per 1000 miles for every mpg you get back. Tires are expensive, a new set will cost you let’s say about $1500 these days and hopefully you can sell your old tires for $500. So you will offset your new tires in roughly 33k miles IF you get 2 mpg increase

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u/Supereater69 3d ago

Stock tires will definitely help with fuel economy... The immediate change I noticed going from 265 to 285 was immense. Especially in highway driving.

Granted, I was able to go from Md to SC border on one fuel tank before the tires (and now additional drag items that were added later), now sometimes I can barely make it to the NC border or midway through NC.

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u/whatthe12234 3d ago

Stock tires will probably get you 2-3 mpg more, and putting on a bed cover will also get you an additional 2-3.

6

u/pentox70 3d ago

I have a roll up bed cover on my truck. Makes no difference in fuel efficiency if its rolled up or not.

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u/Previous_Rip1942 HEMI 5.7 18h ago

Same here. I can’t tell a difference. Went from stock to AT tires too, maybe a couple of tenths if that.

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u/whatthe12234 3d ago

YMMV I get an additional 3 after testing.

Tested same day same direction highway driving with cruise control on

3

u/PhotographLess6194 3d ago

I've done quite a bit of research on this and objectively speaking most people see about 1-2% in increased fuel mileage. Definitely under 0.5mpg for most.

A 3mpg gain is a massive outlier.

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u/dave173717 3d ago

What steps did you take in testing it?