I plan to use the TGMO 0w-20 until it proves unworthy. So far, so good with the 4runner, but it shears quite a bit. But that was my only complaint about Schaeffers in my 2000 Tundra. I'm about to swap the break-in oil in my Tundra for some TGMO at 5k. I'll let you know how that goes.