The Tundra's base engine is a V6 that few reviewers tested. Most tested Tundras equipped with one of the two available V8s, which provide ample power. In particular, test drivers said that Tundra models with the larger 5.7-liter V8 feel especially quick. A rear-wheel drive Tundra with the V6 engine achieves 16/20 mpg city/highway, which is fairly good among similarly-configuRed pickups. The Tundra can tow up to 10,400 pounds when equipped with the 5.7-liter V8. Reviewers agreed that the Tundra's interior is well-assembled, with easy-to-use controls. They were impressed with its spaciousness. A regular cab Tundra can seat three, while the two-row Double (extended) Cab and CrewMax (crew cab) models have seating for up to six. The base Tundra comes with dual-zone air conditioning and a four-speaker stereo with an auxiliary input jack, but not much else. Features that were available include power windows, door locks and mirrors, a 10- or 12-speaker JBL stereo, Bluetooth, leather seats, heated and ventilated front bucket seats, a backup camera, a power moonroof, a rear-seat entertainment system and navigation.