If it's a 4.0 with an automatic then it's probably a Peugot. The RENIX motors are a bit quirky as Gunner said, but they will run for ever with a bit of TLC. I've got 176K on my '89 and it runs like a champ. I chage the oil/oil filter every 2500 to 3000 miles and tune it up once a year. Depending...