So here is my last oil analysis from blackstone labs on our 2008 LGT, stock turbo, stock engine, and stage 2 tune at 17.5 psi. We have been running Subaru synthetic oil and it seems to be working great. My wife daily drives this car and we also drive it on the weekends. We don't drive this car nice. Almost 9,000 miles on this sample, the car burns no oil and we didn't need to add any oil during those 9,000 miles.