Bought this truck with over 110,000 miles on the 5.4 Liter engine for $6,000 5 years ago. The guy that owned it before me towed flat bed trailers loaded with steel across country for a living. I was scared as heck to buy it, but I've always been a Ford man so went by faith. Well I've got 242,000 miles on the engine and all is great. Not near as snappy off the block or as tight, but I can still press the gas in congested driving situations and blow the doors off anyone. I love this truck so much. I'm about to buy my next used Ford F150 Lariat with a 100,000 miles on it. Embarrassed to say, but I've let the engine run out of oil at least 3 times (dry as a bone). Oe tough engine!