At the end of the grass-cutting season, drain both gasoline and oil from your lawn mower. Oil should be drained so that corrosive contaminants won't have all winter to damage internal parts.
A well-maintained lawn mower starts effortlessly in the spring, runs cleaner, and helps make yard work just a little bit more enjoyable. Here is a basic overview of how to prepare your gas-powered lawn mower for winter storage.
How do I drain oil from a gas powered lawn mower?
By Alex