I would suggest using an ACEA A3/B3 rated motor oil. One benifit of the ACEA A3 rating is a high temperature high shear viscosity (HT/HS) of >3.5. From the ACEA web site: A3 Stable, stay-in-grade oil intended for use in high performance gasoline engines and / or for extended drain intervals where specified by the engine manufacturer, and / or for year-round use of low viscosity oils, and/or for severe operating conditions as defined by the engine manufacturer.
The two xxW-30 oils that I can think of that will be fairly easy to find are Castrol Syntec 0W-30 (German red label) and BMW High Performance Synthetic Oil 5W-30. Both of these oils are nearly 12 cst at 100 C. The Castrol Syntec 0W-30 is usually about $5.00 at AutoZone and the BMW HP Syn Oil is usually about $4.00 at BMW dealers. Both oils provide low wear numbers. The only negatives that I have heard about the BMW HP Syn oil is that it sometimes leaves a brown deposit on the inside of the oil fill cap. I think most complaints about this are due to BMW's VERY long oil change intervals of 10,000 miles or even 15,000 miles or two years whichever comes first for the newest BMW's. Also if you are willing to try a 40 wt oil AutoZone carries Mobil 1 0W-40. I don't know if you have Checker Auto Parts where you live but they sell Valvoline Synpower 5W-40 which is a very good oil. Also Amsoil 5W-30 would be an excelent choice in my opinion
[ October 20, 2003, 10:15 PM: Message edited by: Sin City ]