Patented oil-injected system provides reliable performance by eliminating spark plug fouling and carbon buildup. The no-mix system is an added convenience for operators. Plus an amazing fuel to oil ratio of 120:1 allows for longer and cleaner run times... up to 65 hours on a single tank of oil. A low oil shutdown switch prevents running the rammer without oil, for trouble free operation. Exclusive air filter compensation system allows for longer run time between filter changes