Lubricant for Chainsaw Bars and Chains

Chainsaw bar and chain oil is specifically formulated to stay on the bar and chain at high speeds while providing lubrication to reduce friction and heat buildup. General-purpose oils lack the tackifiers needed for this application.

Why Specialized Bar Oil

Bar and chain oil contains tackifiers (stringy additives) that help the oil adhere to metal surfaces despite centrifugal force. At chain speeds exceeding 50 ft/sec, standard oils fling off immediately.

Summer vs. Winter Formulations

Season	Viscosity	Pour Point	Application
Summer	ISO VG 100-150	-15°C	Above 5°C ambient
Winter	ISO VG 68-100	-30°C	Below 5°C ambient
All-season	Varies	-25°C	Moderate temperature range

Winter formulations have lower viscosity to flow through the oiler system in cold weather. Using summer oil in winter results in inadequate lubrication and accelerated wear.

Biodegradable Options

For environmentally sensitive areas (near waterways, protected forests), biodegradable bar oils based on vegetable esters or synthetic esters are available. These meet requirements like EU Ecolabel or USDA BioPreferred.

Oiler Adjustment

Most chainsaws have adjustable oil flow. Proper setting depends on:

• Bar length (longer bars need more oil)
• Wood type (hardwood needs more)
• Operating conditions (dusty conditions may need more)

Check oil delivery by holding the running saw over light-colored surface—you should see oil spray pattern.

Substitutes

While dedicated bar oil is optimal, acceptable substitutes include:

• New motor oil (not used) in emergencies
• Vegetable oil for short-term use in sensitive areas

Avoid: used motor oil, transmission fluid, or thin penetrating oils.