ATV Oil, Lubrication & Filter Is 5/20 ok I’m my 800? June 23, 2015 Is Mobil 5W20 ok in my 14 sp800 transmission? I know some guys use it with machine that have a separate rear diff. Is it ok since my machine has a transmission combined with a rear diff? Or am I misunderstanding this? Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related