That's all I use for all my arsenals is straight up (no mix) Mobile Synthetic Oil. I shoots USPSA, Steel, IDPA, 2gun, Combat Match and 3 guns. I don't have a single issue with motor oil that causes weapons to malfunction. BTW: I lube my AR BCG/Upper really wet, everywhere regardless of what the YouTube video warning. When it is time to clean, take cloth/paper towel and just wipes off the carbon build up, clean it with Mobile, and re-lubes. Try it, you'll see if I'm full of BS or not.