Has anyone used Amsoil synthetic Transmission lube 75W-90 GL-4 in their 1969 4 speed?

...most of their software is nothing but a bunch of glitches and incompatibility bundled together in an expensive package!

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We can agree on that. And unlike Amsoil, which has great products, M$'s products are for the most part, inferior to other similar offerings from other sources (open!).

So you see, I'm not really an incorrigible zealot. Just very opinionated. And I don't usually push my opinions online anywhere if they are not backed up with personal experience.