This multi-system additive is great in your oil or gas. When added to your oil this will lubricate and free sticky valves and pistons adding a layer of protection to your crankcase while also helping to quiet noisy engines. If adding to your gasoline it will help clean out gum and varnish to restore lost engine power and reduce any rough running issues. It also has powerful corrosion inhibitors to protect against water-attracting ethanol-blended fuels. This is a great can to keep around the garage for any small engine equipment you may have. It works great in mowers, leaf blowers, snowblowers, chainsaws, weed whackers, generators, and more. Effective in both 2 and 4-cycle engines.