Just bought a new 2018 Tundra SR5, TRD Sport 4x4 with the 5.7. First tank of gas, hand calculated, gave me 16.2 mpg and 140 miles of that was pulling my boat. I'm thinking it should break 17mpg after the break in period, we'll see. Love the power, love the ride, a fine truck. I'll later add a 2.5" front levelling kit with the front differential drop spacers and maybe go to 315x20" tires so I'm sure that gas mileage will take a dive.
