I have concluded that the search function on this site sucks half the time. I spent the last hour looking through old threads for an answer on this because I know it's been covered before, but kept getting hundreds of unrelated hits. It seriously needs the use of boolean operators and quotation marks for exact matches.
Aside from that, I need to change the oil in my Toploader to flush out the last bit of metal junk that came from my earlier findings documented here. I recall hearing people say that GL-4 was the only stuff to use because of something bad that GL-5 does to brass blocker rings or something.
Is this true at all? Does it even really matter in the end? I have enough 85w-90 GL-4 and 85w-140 GL-5 to use either type. Which one will be better?
Aside from that, I need to change the oil in my Toploader to flush out the last bit of metal junk that came from my earlier findings documented here. I recall hearing people say that GL-4 was the only stuff to use because of something bad that GL-5 does to brass blocker rings or something.
Is this true at all? Does it even really matter in the end? I have enough 85w-90 GL-4 and 85w-140 GL-5 to use either type. Which one will be better?