35s and MPG's

JDW123 · Sep 19, 2016

35s and MPG's aren't always two subjects that get along with each other. I'm planning a bilstein 5100 at 2.1" leveling lift soon. I'm looking at the 275/65 tire size, but considering the 35x12.50 route too. I'm sure this subject has been beat to death, and I've searched, but I think my search was too simple because it turned up zero results.
Everybody knows what's coming next.

What's your avg mpg (hand calc'ed or computer)?
275-65s or 35s?

Thanks!

Oh and by the way I'd like to buy a set of 20" sport take offs, but I can't post in the wanted section yet.

Josh

Csanders1992 · Sep 19, 2016

My truck is a crew cab hemi/8 spd/3.92 4x4 and have 35x12.50s on stock wheels. I get about 15-16 depending how I drive. It easily will drop to 14 also. This is average of course. Mostly 2 lane country roads and I drive over the speed limit

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trip1027 · Sep 19, 2016

2012 ram 1500 5.7 hemi 315 70 17 average is 17 but I'm usually doing 80-85 on the interstate bout 19 if I keep it calm around 65 and about 8 when I really tired of being behind people and I choose to pass

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trip1027 · Sep 19, 2016

Oh and a 6 speed auto

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JDW123 · Sep 19, 2016

thanks for the replies guys. I've got the stocker 275/60s right now. you know, the grocery gitters. I'm only averaging 17 so that's not much of a drop. just have to figure out if I want to spend the extra $300 on the tires just to gain an inch. On a side note, my '14 Tacoma double cab only got 17mpg so I got a bigger truck, with more power and the same efficiency!

94z28joe · Sep 19, 2016

I'm averaging about 13.5 mixed driving on mine. 3.55's and 6 speed auto

CDNUSER · Sep 19, 2016

I am averaging 20-21 mpg on my 09 SLT 4x4 5.7 stock setup. All hwy driving 20 mins each way.
Maybe its my new laid back driving style.

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kccustom · Sep 19, 2016

35's and 4" lift I get 13

misuracaf10 · Sep 19, 2016

275/65 Toyo RTs and I get about 14 city and 17-18 highway

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trip1027 · Sep 19, 2016

CDNUSER said:
I am averaging 20-21 mpg on my 09 SLT 4x4 5.7 stock setup. All hwy driving 20 mins each way.
Maybe its my new laid back driving style.

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Or u r also complete stock.....

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trip1027 · Sep 19, 2016

Any also do their intake and exhaust, chip.... and so forth with 33-35 tires and still pushing 16+?

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Csanders1992 · Sep 19, 2016

JDW123 said:
thanks for the replies guys. I've got the stocker 275/60s right now. you know, the grocery gitters. I'm only averaging 17 so that's not much of a drop. just have to figure out if I want to spend the extra $300 on the tires just to gain an inch. On a side note, my '14 Tacoma double cab only got 17mpg so I got a bigger truck, with more power and the same efficiency!

17 is about what I averaged prior to tires and leveling kit. My truck is stock otherwise, no exhaust or intake

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JDW123 · Sep 19, 2016

misuracaf10 said:
275/65 Toyo RTs and I get about 14 city and 17-18 highway

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So yeah that's why I asked. It's not that I need that extra 4 to 5 mpg but 4 to 5 less for one more inch of tire doesn't make sense. Now, a few months from now I'll have 35s! Lol

CDNUSER · Sep 19, 2016

trip1027 said:
Or u r also complete stock.....

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Yes 20" stock rims with sport tires. Just looking forward to new tires and rims this fall. Looking at bilsteins and new exhaust too.
For a big truck its pretty good on gas. Was very surprised.

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xrsman · Sep 19, 2016

Expect a 5 mpg drop when where you currently are. This question has way too many variables to give you a solid answer. I averaged around 16 mpg, however stock I was closer to 20. Both numbers were with a Hemifever tune, CAI, and exhaust. Driving fuel efficiently

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OUMX117 · Sep 19, 2016

275/65-20 and you can see my mpg in my sig. Don't expect more than 15 hwy. I have to work really hard, and drive 65 or less to get that. My truck had 35x12.5 before this set of tires. I couldn't break 13mpg avg. this is all documented via fuelly. Don't believe the evic. And don't believe the "I get 20mpg with 35s" claims either.

JDW123 · Sep 20, 2016

great info guys. I do appreciate it.

misuracaf10 · Sep 20, 2016

JDW123 said:
So yeah that's why I asked. It's not that I need that extra 4 to 5 mpg but 4 to 5 less for one more inch of tire doesn't make sense. Now, a few months from now I'll have 35s! Lol

I probably lost 1.5 mpg from stock. I think the 3.92rear end helped. I did mod my truck with a tune and intake. But I think that only saved me 1mpg. So realistically I probably lost about 2 if I was stock besides the heavy tires. And I didn't want to spend money on a suspension lift to fit 12.5 wides. That would have cost more and I would lose even more mpg with 12.5 wide tires

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WiSH2oo0 · Sep 21, 2016

I avg anywhere from 10.5-13.75(highest calculated) mpg with Toyo Open Country M/T 35x12.50R20 @ 45 psi, 3.55 ratio, cat back exhaust, 89 octane and all gen maintenance is up to date. My speedo is off as well and I also use long division at ever fill up to figure my mpg.

nclark112 · Sep 21, 2016

I usually get about 15-16 highway (at 75 mph) and around 12 in town.

35s and MPG's

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