Trust you on the heat thing? Let me guess, it catches fire?which isn't overly a bad thing.
I really tried for thixotropic [controlled of course] with the moly lube.
i tried with several others but they went to goose poop at certain ambient temperatures as soon as you put them under pressure.
polyglycol looks good too [is good actually] but you have to manually mix it with other waxes and you have to watch the temps you heat it to.
[trust me on the heat thing]