If you don't open the air-tight seal, can last quite long. Perhaps 2 years or 3 years tops? If opened, it's oxidised and exposed to moisture. I wouldn't keep that too long. Maybe can use it as flushing oil.
[SOLVED] Turbo noise when spooling into boost [Boost Leak]
Hi folks
Need help on my turbo issue.
After reinstalling a rebuilt T28 (yep, i have the comp wheel fins shattered), i have high pitch noise whenever...