KERMA reported that he was going to use mickey's VNT 17 but had to replace the bearing due to coking. mickey runs amsoil. he also lives in the mountains (steep hills) at high altitude (thin air).
Yes you are correct.
The oil seal was bad, so I sent the turbo to its daddy in Texas (Robert at Forced Performance) so he could go through it. He said the bearing was so coked that the shaft hardly turned at all, and the shaft itself is discolored from the rubbing. Stupid Amsoil!
Talked with Mickey later, he said he ROUTINELY pegged his EGT gage for MILES going up Parley's at 100+ on his commute. That's 1650F plus, folks. His oil temps exceeded 280 for extended intervals also. So it's not Amsoil fault after all, I don't think it was designed to be boiled...
I tell ya, that guy should get a job testing stuff trying to break it, he sure is good at it! If Mickey can't break it, then, hell, it's probably over-engineered anyway, too expensive to produce.
Remember 10% soot levels before he re-torque his racewares, too. Probably didn't help.