Well, I suppose I should change my forum name... I'm no longer a "forkman". In 2 weeks I start as a correctional officer in a medium security prison. I'll be moving and leaving my fiancee behind for a year (until she finishes college). I'm looking for an extended drain oil for her 94 Regal since I won't be able to do the typical 4000 mi changes I've been doing on it. It currently has 125K mi on it. It'll probably get changed every 6 months or about 7000 miles. Her typical driving habits: She drives mostly short trips to and from school and work each day. 6 mile round trip to school and about 9 miles round trip to work. That's about 6 short trips per day lasting no longer than 15 minutes each. About twice a month she goes to visit her family (and will now be driving to visit me). These trips are about 150 miles one way. The car right now has Mobil1 10w30 in it. I was thinking of using Havoline 5w40 synth but have decided against it since its not a PAO based synth. What does anyone think of using M1 0w40 in this application. Or perhaps some combination of M1 10w30 and 0w40. I like the looks of the specs for the M1 0w40 with its cSt at 40deg being 80 with many dino 10w30s being in the low to mid 70s at this temp. And the cSt at 100deg is 14.3 so its not too high in the 40wt range. So opinions or suggestions. And please no Amsoil or Schaffers recommendations. I'd like to keep the oil something easily purcashed at any autoparts store or WalMart.