Average Mpg with a 3 inch lift and 33 inch tires?

I have the 2017 TRD Off-road DCLB with a 3” lift and 285/75/16 BFG KO2’s. That’s 32.8x11.2” tires. I average 13-14 mpg in town and 17-18 mpg on the hwy with a combined of 15mpg. I was getting 12-13 in town and 16-17 hwy with 14 combined but I put a aFe pro air filter in and had my YAW sensor and PCM reset a few weeks ago and my mpg has improved some. I would like to get 15 in town and 19 hwy with 17 combined but it’s not going to happen without 4:56 gears.
 
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