ATV Repair and Maintenance PS 4 vs. Other synthetic oils April 30, 2015 Has anyone tried other synthetic oils as opposed to the grossly overpriced ps=4. I would think that 4 cycle 5-50 synthetic Mobil 1 should do the job. Any thoughts? Thanks in advance. Wayne Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related