Originally Posted By: tarbasd
Let me just add one data point. I bought my 05 Corolla with 37K miles in 2008. Started to use PP right away, and it consumed about 1/2 qt every 5000 miles, which was, and still is my OCI. I was fine with that, topped it off regularly, keeping it at or just below max fill (old dipstick). Than gradually the consumption decreased, and by 80-90K (I don't remember exactly) it stopped altogether. Now at 107K, still using PP, no consumption, oil kept at old dipstick max level.
Yours has the new and revised pistons, so not exactly apples to apples, but good point on using one brand oil. Unfortunately my oil stash consists of FAR or otherwise very discounted oils of various brands, so I can't do that yet. That gives me also a chance to experiment more.