what do you get around city or highway, depending where you drive the most, whats your city/hwy combination, what mods do you have and did the mods improve or decreased your mpg?
Nick,
What you are asking is very subjective. There are so many variables that go into fuel efficiency such as:
Location
Driving style
Type of gas
Tire pressure
Winter or summer
Mods
I have found it gets what Toyota advertises and I get an overall of about 19 mpg but that's me, driving a stock SR5 in the mountains with 35 psi tires in the spring using 87 gas. You will get about that. You will NOT get 30 mpg nor will you get 10 mpg, unless A) you are a hypermiler or B) you lift it to the sky, put on 44's and swap out for military axles. You will get somewhere in between those extremes.
There are a few things you can do that will give you, maybe, 1-2 mpg better (afew more psi in the tires, driving conservative) than average and a LOT of mods that will decrease your mpg such as:
Putting a tent on your roof
Adding weight like refrigerator, air compressor, camping gear
Bigger heavier tires
Heavier rims
Lifting your truck
In some cases with mods you will not notice any change in mpg (vent visors, bug shield, lighting mods). In others you will notice a lot of mpg change. For example, if you do a ton of mods like lift, big tires and wheels, full cage, etc but you only drive a few hundred miles a month so what? Now, if you are like me and drive 3K miles a month a simple change in tire pressure could hit the wallet harder than the guy with tons of mods who drives the 200 miles a month. Hope this helps.