2015 Toyota Tundra's Fuel Economy or Gas Mileage - Fuel economy ratings for the 2015 Toyota Tundra were not yet readily available, so we are able to only speculate how each and every powertrain combination might fare. Together with the base V-6 with rear drive, the truck will probably be rated at around 18/22/19 mpg city/highway/combined.
Versions equipped together with the 4.6-liter V-8 really should get an estimated 15/20/17 mpg with rear-drive and 14/19/16 mpg with 4WD. The 5.7-liter V-8 will likely be rated at 13/18/15 with rear-drive and 13/17/15 with 4WD.