If you aren't concerned about oil related failure being covered under warranty, and if you don't care about fuel efficiency, then go for it. Generally speaking, you could throw used baby oil into a Subaru 2.5 engine and it would return great UOAs if it's in good working order.
Frankly, with gasoline prices creeping ever upwards, fuel efficiency becomes more and more attractive. Given that most any oil can give you a great UOA with your car, why not go with a commonly available oil that's a little more friendly at the fuel pump? Mobil 1 5W-30, perhaps?
Anyone ever tried and UOA'ed a 5W-20 in a Subaru 2.5l engine? Now *that* would probably give great fuel efficiency!
[ May 06, 2005, 09:45 AM: Message edited by: bigpaulo ]