THE STIHL® 4-MIX® ENGINE
This revolutionary technology features a patented lubrication design that allows the 4-cycle engine to use standard STIHL® 2-cycle (50:1) fuel mix, thus eliminating the extra oil tank for engine lubrication.  The STIHL® 4-MIX® engine is lightweight, powerful and has fast acceleration while exceeding current low-emission requirements.