I'm nearing the end of an Auto-RX treatment on a 1999 Hyundai Elantra (129k miles), and am wondering which is preferable. Both have moly, and both are part-syn. Maxlife is really easy to get, while Schaeffers is more difficult to find. I feel the seal-swelling additives in the Maxlife are not needed since using the Auto-RX. The car sees mostly highway use in the Northeast US. Grade-wise, 5w30 is what I'm running with year-round.