Both million mile trucks were 4.7s , likely the most durable V-8 ever produced, will the 5.7 match that? I seriously doubt it, just not in the same league.
You're correct on the million mile Tundras. That 4.7 was an incredibly durable engine.
That said, the 5.7 has a great track record for durability too. I know several guys that have their 5.7 over 500k. And one acquaintance, a surveyor, is just about to turn 700 kilometers. None of them have had problems beyond alternators, starters, water pumps.
