Engine Technologies

STIHL Low-Emission Engine Technologies
STIHL employs a variety of technologies to meet and exceed EPA and CARB requirements while meeting the needs of its customers. Various technologies utilized include stratified charge, catalytic converters and the STIHL 4-MIX^®. STIHL bases the technology selected for a particular product on that which is best-suited to the product’s applications.

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. The STIHL Class IV and Class V 4-MIX^® engines offer some of the cleanest running engines in their respective classes, according to the most recent information as posted October 2008 on the EPA Web site.

Breaking it Down
As we lead the charge in developing cleaner engines, similarly we lead the way in minimizing environmental impact by offering non-petroleum based oils and lubricants. Our BioPlus™ bar and chain oil and HP Ultra 2-cycle engine oil are highly biodegradable in only 21 days, reinforcing our assertive position in caring for nature.