Ok.  Heres my opinion on oils:

It doesn't make one bit of difference WHAT oil you use, as long as you change the oil and the filter regularly.  The problem these days isn't so much with the oil breaking down, but with all the dirt/carbon/fuel/condensation and crap that gets into the oil and can't get out.   Thats the major problem with all the oils that advertise that you can run them for 10-15K miles with no problems.  In a vehicle that is driven offroad, where its way more likely to ingest tons of dirt and dust, is lugged at low RPM and gets extra fuel and carbon in the oil, it is especially important to change the oil often. 

My choice for my crawler:  Plain old Valvoline 10/30 and a Toyota D1 filter.  I change it every 3 months, wether it needs it or not.  (this vehicle is only used off road, so it rarely has more than 1000 miles on it between oil changes)

My Supra: Gets Mobil 1 15/50 cause the turbo runs hot.  I change it every 2500 miles with a Toyota D1 filter.

My F-250: Gets RotellaT 15/40 or Delo 15/40 and a Motorcraft filter every 2500 miles.  Diesels (especially the old ones) turn the oil black in a hurry. 

Any power gained by switching to a particular brand/type of oil you couldn't feel in the seat of your pants anyway- just change it OFTEN!

Also, on the 22R it is particularly important to use an oil filter with an anti-drainback valve in it to keep some pressure on the timing chain tensioner.  This prevents the chain from slapping when you start the engine and in turn makes your timing guides last longer.  The Toyota D1 oil filter is about as good as it gets...

Ryan