I have a little dilema right now.... there are a lot of people around my way that have mixed feelings about the kind of oil to used in a turbo B-series. I'm only pushing 6lbs but Im still being cautious. Ive been using 20w-50 the last few months.This is where the dilema comes in to play, a friend spun a bearing at the track last summer and switched to 20w-50. Another friend has had a couple turbo-B series and always used 10w-30. I could go on and on about the different types of oil for different set-ups, but I'd like to know what some other GSR/ B16/ LS-turbo guys are using and what kind of problems that they have had....if any. I appreciate it