Watching mountain men show and Marty that fly’s a small single engine plane (Bush plane) in Alaska shows him changing his engine oil he does every 25 hours .

The strange part they show him using aviation oil in 20w50. Weight.

Seems very thick for such cold temperatures.

Is this normal in the aviation planes?

Sure is.

Are they filming new shows or showing repeats from earlier years?

New season is airing. Cant get back into it.

I have watched it at times. It has more than run it course. I have always thought marty was a bit of an ego maniac. Quite full of himself. Those guys get big bucks for doing their deal with lots of production in the show. Some of their stunts are just plain dumb and many others are choreographed. It is a tv show. The "real" mountain men are not on tv. Trust me on that one.