Absolutely. Unfortunately, unless AMSOIL or some other boutique formulator chooses to run the tests and publish them, we have no way of knowing which oils do or don't. The major oil companies certainly aren't going to provide that information to you. It looks like ACEA C6 would be a good starting point.
I've never thought it a coincidence that so many engine families, seemingly mostly Japanese, that specify 0W-20 end up oil burners later in their life due to stuck rings and plugged oil return holes.
Ed
