I respect your opinion, Rusty; but not quite right. It's mentioned, but not the first choice- and only for "extremely cold climates".
Right from the four speed section of the '68 FSM:
View attachment 1716075672
But people will run what they want to run, it's all fine with me.
As far as synthetics go, I don't like them in the 833s though- they tend to weep past the side gasket (which you DON'T want to run sealer on). But that's all factory spec- if you want to maintain any kind of warranty coverage, find out and stick with what Passon recommends- and get it in writing.
