Robert Pickard 
2010 Toyota Tacoma Regular Cab 2dr Regular Cab 6.1 ft. SB (2.7L 4cyl 5M)
23.5 mpg in four wheel or not, air on or not.
 look at the head lights if you buy this truck used. not that there's a problem with them, but the dealer ran mine thru a car wash and cracked them and I hadn't noticed til I got it home. (too late)   also I would be very careful waxing it. the dealer detailed mine with wax. what a terrible job they did( got it all over the cladding).  no problems with the truck its self just watch your dealer.