Bar & Chain Oil is a total-loss lubricant-100% ends up on the ground. Each year, 18+ million gallons of petroleum-based bar & chain oil contaminate the environment, and just 1 gallon can pollute 1 million gallons of drinking water.B3C's Mechanic In A Bottle Biodegradable Bar & Chain Lubricant with BioSlick is a groundbreaking, oil-free, water-soluble formula with no petroleum oils. BioSlick reduces friction, vibration, and heat-delivering more realized power and significantly longer battery life.Specially formulated for battery chainsaws to extend runtime and engineered to maximize performance in all chainsaws (gas, battery, and electric).128 oz (label may vary)BEST VALUE FOR BIODEGRADABLE BAR & CHAIN LUBRICANT.