A Spill-Free Way To Fill Your Chain Saw's Oil Tank Instead of recycling that used dish-soap bottle, rinse it out and fill it with oil. Then use it to refill the chain oil tank on your chain saw. When your tank needs reloading, squirt the oil into the tank. There is no need for a funnel, and there is never a mess to clean up. —Clay Pennington, Asheville, N.C.