Originally Posted by Hatterasguy

I change them once a year, air filters are cheap, gas ain't. Its also a good chance to vacuum out the airbox and wipe it down with a damp rag to get rid of all the dust and dirt.

Originally Posted by mpolli

True. Every type of equipment in the world has its usage measured in terms of hours except for one: cars. The reason is because cars have odometers and not hour meters. Some people put hour meters in for this reason. I have thought about putting a "pre filter" in the tube to the air filter box to keep the rif-raf out. A lot of dirt piles up in there.