Personally, I'll be steering clear of any of the eco-blows in the future. I had a 2015 with the 3.5 on it that had 62k on it when I bought it. It was a clean one owner and I bought it from a reputable dealer in the area. I had that truck from June to January, and in that time frame it had the following issues:
- Timing Cover Oil Leak (was later discovered this leaked because the timing chain, tensioners, and timing system had already been replaced once)
- Transmission replacement
- Spark Plugs and Ignition Coils to the tune of $450 per cylinder
In addition to the repairs I had performed, when I traded it in at 68k, the following things were wrong with it:
- Transmission was going out again, I blame the Ford reman unit on this one
- Transfer Case problems
- Leaking rear Dif
- Bad Turbos
- Timing Chain Chatter
I told the dealer where I traded it in about the issues I had. The tech pulled up his computer and got into the Ford repair log (I was at a Chev dealer, but they own a large chain of multi make dealers in Utah). He pulled up the repairs list and I about puked. Before I owned it, the previous owner had done the following:
- Transmission
- Turbos x2
- Timing Chain/Tensioners
- Transfer Case
- Head Gasket
I was blown away. The guy who was looking things up for me just turned to me, shrugged, and said "that's par for the course on these Ecoboosts. We see more of them in our dealers for catastrophic issues than any other vehicle make."
Additionaly, my dad drives a 2019 for work. He lost the trans at 30k and had NEVER towed with it, and he's got the timing chain chatter issue too. I'm a lifelong Ford fan, but I'll never own another one as long as I live. If I was you, unless you had EVERY receipt for the repairs and maintenance for the entirety of the life of the truck, I would run in the opposite direction of that truck. And if you were me, you'd be buying another Tundra.