Originally Posted By: esseye
I had planned to, I have gotten some suggestions from LegacyGT.com folks based on this to move to a 5w40 or GC 0w30 as the engine sees very hard use, and based upon the viscosity seen in this UOA.
I should probably mention that it's a 'stage 2' for a LGT, with a conservative tune peaking ~20psi.
Analysis looks good. Pretty high boost pressure on that stage 2. Is that typical for Legacies? What's the stock pressure for a LGT? I'm stage 2 (Cobb AP, Rallitek map) at 17psi (11.9 stock) on my 08 WRX. Your engine looks as if it's taking the increased pressure with no problem.