I have a 99 camry with the 2.2 and that car is a sled. If I lost 5 HP, I think I would have to get out and push. I'm glad to hear that toyota corrected that problem with the new model. I am running mobil 1 5w30 in the car and it seems to really like it, according to the UOA. I have allways used 5w30's in my newer vehicles and have never had a problem with it. In fact, I have never had a vehicle that burned oil, that didn't burn it before I bought it. I had a 93 pontiac grand prix, that had almost 200k when I got rid of it, and the engine was in great shape, and still didn't use a drop of oil between changes. The car saw nothing but 5w30 conventional, but it was changed religiously every 3k.
What is it about 5w30's that you think is causing the wear in the engines you see? The fact that it shears down to a 20 weight fairly quickly? What do you think of the new 5w20's spec by ford and honda?