Q. I have a chain saw. Can I use regular motor oil in the reservoir for the bar and chain lubricant?
A. Chain saw bar and chain oil are highly recommended for this application. Bar and chain oil comes in two different weights of oil – one for summer use and one a little thinner for winter use. Both have special additives so the oil sticks to the chain and doesn’t fling off when running. Chain saw engines run from 10,500 RPM to 14,000 RPM at full throttle. At those speeds the chain is rotating around the bar pretty fast. The bar lubricant has to be able to adhere to the chain for complete lubrication around the bar.