With the caveat that I primarily shoot Glocks, I just run tetragun lithium grease or something similar like lucas oil grease. But I’ve also grabbed some synth oil off the dipstick of the mini cooper S I owned at the time, too, so whatever. I say that as a guy who’s read many of the past threads here looking for a consensus—which never really manifested, beyond a general leaning towards “whatever.”
OMMV.