Dang! You triggered me!
Simply put, I use JD Corn Head grease
https://www.greenpartstore.com/John-Deere-Special-Purpose-Corn-Head-Gun-Grease-AN102562.html
and gun oil…Weaponshield for now. I can see using synthetic motor oil too…..or a gun oil. I'd have to do some research on which.
To me, the key is where to use what.
In general, something without an oiling system and sealed case should use grease. Grease is made because it sticks in place.
So, all guns lack a sealed case, so 100% grease? Try that…..IME, guns with 100% grease feel great, but run like crap. Grease, even NGLI 0 is too thick. 000….maybe, but this stuff is unavailable generally.
So, I use grease, lightly on human powered surfaces and oil on gun powered surfaces….I do try some grease on gun powered surfaces, but minimal. Slide rails….oil. Slide stop….grease, even though gun powered. Disconnector…oil. Sear…..oil, sear hammer mating …. grease, and so on.
i know….different than, "If it slides…grease it. If it rotates…oil it.."