r/shovelhead

74 FXE, oil change - filter, what type?

Owner of a nicely restored 74 FXE. Had the bike a couple years and put very few miles on it. When I got it a couple years ago it had been restored to very nice operating order, oil was fresh.

It runs great doesn't burn any oil and doesn't use any oil. But even though I've only put a couple hundred miles on it I intend on changing the oil/filter.

The guy that restored the bike died shortly before me buying it. I don't know what oil he used.

What's the best oil that I should use in this bike?

And not being familiar with these early motors I'm wondering if I need to change the transmission lube as well?