[Power Surge]

I would contact one of the oil analysis companies, and present this scenario to them, and see what they say. They are the ones who know for sure, exactly what is in what. Plus they have you list your combo most of the time, so you never know the data they may have complied, and might have some pretty relevant info on this subject. They also aren't "selling" you oil, so their veiw should be unbias.

I use Blackstone Labs for my diesel oil samples every oil change.