This is getting as ridiculous as an IMSB discussion.
Couple points and I'm done:
1: My Subaru parts manager told me crush washers are re-usable.
2: I've been re-using mine for over 10 years in my Subarus (Occasionally using new washers) and going on 2 on my Boxster with NO leaks.
3: If any of them happen to begin leaking, I'll replace the crush washer. (And if it does leak, it won't be a gushing leak. It'll be a slow occasional drip, so to say that you're risking your expensive motor is nothing more than hogwash. Only someone who has fallen out of bed head-first too many times would say or believe that.
)
