I have been running ASL for most of the 49000 miles that are on the motor. I am just thinking about going Maxlife Synthetic 5w30 to see if it can rid the motor of a couple small leaks. One is in the oil pan, and the other one I havent quite pin pointed yet. The oil pan is quite a job to do, that is why I havent fixed that one yet. I would have to remove power steering lines, the K frame, turbo charge pipe, oil cooler, and power steering cooler just to remove the oil pan. I contacted Valvoline about HT/HS and they said the 5w30 is 3.5 and the 10w30 is 3.6.
The maxlife has a higher Viscosity and a lower noack%. The maxlife is A3 and the synpower is A5, but I dont know what those mean....?