Greg 
2018 Toyota Tundra Double Cab SR5 4dr Double Cab 4WD SB (5.7L 8cyl 6A)
Not as good as my 2006 Tundra Access Cab
 The headliner in my 2018 Tundra 4WD DC looks ragged and unfinished where it meets the rear window frame. I examined a number of other brand new 2018 Toyota Tundras on the lot and they ALL look unfinished and raggedy, except for the Limited, Platinum, and 1794 editions with power rear windows. The engine (5.7L) is VERY noisy during cold startup, it almost sounds like a darn diesel, with knocking noises which gradually diminish as the engine warms up, but never go completely away. My 4.7L in the 2006 Tundra NEVER made any noises like this 5.7L does. It's very disconcerting, to say the least. Toyota recommends 0W-20 in the 5.7L, but I'll be changing it out here shortly when I reach 2,000 miles to Shell Rotella T 5W-40 synthetic, the same oil I've been using in my 2006 Tundra since it was new. In retrospect, I may have made a mistake purchasing this new Tundra, but I'll give it a chance. Maybe things will work out. I'm just used to having better quality, fit, and finish. Even my 1984 Toyota truck, as bare bones as it was, still had a better finished headliner than my 2018 does.