All gas-powered riding lawn mowers have oil filters, but most walk-behinds don't. So if you own one of the latter, you're probably off the hook, although you'll still need to change the oil regularly.

The below shows a typical oil and filters change on a 2004 Kawasaki ZX-10R, but should be relatively representative of the vast majority of motorcycles. 1. Changing your bike’s oil and filters ...