As for this question of "why one forumulation spec than then another ... the first was spec at some time and should be good enough". We are supposed to learn from our mistakes aren't we? Engineers do the same thing ... at the time, the engineers thought that the spec was good enough. xxxxx service warranties later, they have rec-spec'd the fluid to avoid known issues. It's a simple by product of testing ... except that WE where the guinee pigs
