Ahh that old oil argument.
I had my mechanic over yesterday, we are good friends. He's a retired Toyota Master Mechanic with all the hook ups.
We talked about oil, and he said it all depends on what kind of deal the dealership gets on oil, whatever they can buyer cheaper, they will sell.
I'm currently a big fan of Castrol full synthetic. I'm running the German Castrol 0W-30 in my STi and 5W-20 (as recommended by Honda) in the Accord.
I will find out what the owner of my future ISF used when the time comes. I'm almost certain I will go with either German Castrol or 5W-30 full synthetic and the OEM oil filters.
I expected the engine to hold more oil due to it's size and special oil system.
I've been reading about the engine lately and like what I see:
1. Hollow camshafts. (sounds familiar, Subaru STi has those)
2. Engine/trans oil coolers.
3. Direct and Port injection.
4. VVTi on both intake/exhaust valves. (sweet)
5. The valves are titanium.
6. The engine oil system is designed to keep everything lubed, even during high G cornering.
7. The heads were designed by Yamaha.
I think Toyota did a great job here. I'm looking forward to this.
Here is the lap I got with the instructor on 05/31/2008 after driving the car myself: