I poured in a qt of PYB into my 4.5 qts of SS...yes on purpose! Oh the humanity! Group IV with group II? Say it isn't so... Oh where does the insanity end?!... I had to go somewhere to confess this unspeakable crime! Forgive me for I have sinned! Yeah, anyway I did do the above to my Subi when I changed the oil the other day. I ran Amsoil 0-20 SS for exactly one yr and 7,000 miles and am sending out to Wix for a UOA. Will post UOA here. Got lazy and added the PYB 5-20 since I didn't want to open another gallon of SS. Meh, what ya gonna do 🤷â€â™‚ï¸. Might help with the minor consumption who knows. That is all, carry on.