Wow! Shades of 1969!
When the 750 came blasting out & breaking chains, the DID company jumped in with their "Heavy Duty" #530 chain and a small tube of goo, and a hard-to-assemble master link. They supposed it was the "weak link" for the bike before Honda found the real reasons. It was in a silver-and-black tube, looked like 90w oil to me.