i had a motor go bad at 22,000 miles and ford replaced only the short block. prior to the problem the engine was hesitant between 1k and 2k and no engine lights came on. all of a sudden the engine light came on and i had it towed to ford. the said cylinder 4 piston was severely damaged. and asked for a record of oil changes so i provided receipts of the 3k intervals. they almost didn't cover the engine because it took time to produce the recipes for the oil i purchased. anyways 3k to 4k mi later the same problem has happened and I'm enraged. they took 2 weeks the first time to repair it and the did a short block only. which tell me from deductive reasoning that the problem was also the head as well. has anyone had any experience with this problem?