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Fuel mileage and 35s?

18K views 17 replies 14 participants last post by  Dirtboy64 
#1 ·
I'm curious what kind of mileage you guys are getting running 35s, deleted, and tuned. Mixed driving mostly. Also how much did it drop? Will it drop more with a small lift (3-4")
 
#2 ·
3.5 lift and 35s....seeing 14.5 to 15.5 doing mostly highway at 75 to 85. If i slow it down when on back roads i get around 17

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#3 ·
I was getting 18 after deletes and tunes in mixed driving with factory tires. Getting over 20 on road trips. Last month I installed a set of 35" toyos and now the best I can get is 15.5-16 in mixed driving. I know they are heavier tires but not much taller. I never thought they'd knock it down that much.
 
#6 ·
Same. Expect 16 with the wind behind you and a full moon for best mpg you will see.


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#4 ·
My truck is not deleted.
I have a 2" leveling
I run 295/65R20 toyo A/T2 which measure 35.1" tall (per Spec Sheet)

If I hold 70-75 mph empty I get 18-18.5 mpg
Avg daily driving is more in the 14.5mpg range
Towing is in the 10.5 mpg range

This 1-2 mpg worse than my 2011 which had stock 275/65R20 michelin tires.

So either the extra 40hp of the 2015 truck or the bigger tires is eating a 1-2 mpg in fuel mileage.
 
#9 ·
I had a tuned and deleted '12 6.7 with 2" level and 35 toyo MT. I would get 15-16 mixed driving and could get 18-19 doing 60-65 on the highway. My '16 stock mixed am only seeing 14.5-15.5 doing 65-70. Im trying to really leave it alone but its really tempting...
 
#11 · (Edited)
One reason I'm happy with my 33.2inch tires If a 33 inch can't get you out or over neither will a 35 IMO and honestly on an 18in rim they look almost the same.

Buddy of mine has same truck/year/ratio except I have a 300 pound brush guard. we have the same tires and 5 star tuning now. I have 33s he has 35s I get on average 16 to 18 mixed. he gets 14 to 16 mixed. I get 20-22 hwy not trying to hyper mile he gets 17-19 hwy. If I hyper mile at 65 behind an 18 wheel I can get 30 all day :)

I didn't buy for mileage but I wont throw it away either.

For fun to visualize and see sizes check this out.
https://tiresize.com/comparison/
 
#13 ·
I have 2.5" level kit and 325/60/20 tires (35.5x12.8 ) with a brush guard. Mixed I can't hardly get over 14. If I keep my foot out of it then I can get about 15 highway. That's tuned and deleted.
 
#14 ·
I have the 2.5" leveling kit on basically 35" tires and I'm only averaging 10 MPG accordingly to the lie a meter on the truck. Granite, I have less than 300 miles on the truck and that is all city driving no highway so my MPG probably don't count..lol
 
#15 ·
At least for me, the hit in fuel mileage upgrading from the stock Michelins on 18s to 35s isn't as bad as it seems since now my odometer is registering 1/10th per mile less than it should based on one of those "Speedometer Check Sections" on the freeway. The now inaccurate odometer will even throw off hand-calculated mileage, so if I'm now calculating a 12 MPG average, I'm really getting 13.33. Before the tire upgrade I was hand calculating around 14.5 MPG, so I basically lost a little over 1 MPG due to the bigger tires and my 2WD airdam, which seems reasonable.
 
#18 ·
2011 F-350 CCLB Deleted H&S mini max set on performance with 325/60/20 Toyo ATII and 3.55 gears..I just went from E central Ohio to Moline Ill and back..Cruise set at 76 on interstates plus 3 days of local driving while there my hand calulated average for the whole trip was 17.2 mpg..had 30+mph headwinds going out it averaged 16.1..coming home with tailwinds it was showing over 20 mpg
 
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