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Message: [QUOTE="BuiltPowerStrokeTough, post: 1411954, member: 14650"] The 15-16s definitely suck at fuel economy compared to the 11-14s. I had a crew cab short bed 2011 4x4 with 35x12.50R20s d-eleted and I could get (hand calculated) 20 mpg easily out of that one on the interstate and 15 city. My 2016 regular cab long bed with 3.55 gears, 35x12.50r18s, also d-eleted and I was LUCKY to see (hand calculated) 15-16 mpg on the interstate, 12-13 city. And that was me driving the speed limit and babying it. Seems to be pretty hit or miss with the 15-16s as far as whether you will get good fuel economy out of it. I was one of the people who definitely did not get very good fuel mileage out of it. But the power was definitely better out of my 16 vs 11, so I guess thats your trade off. [/QUOTE]

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