AMSOIL Air and Oil Filter Recommended Change Intervals
Appl./Prod.	TS Air Filter	SDF Oil Filter	By-Pass Oil Filter
Personal Pleasure Vehicles	Normal service: 25,000 miles or 1 year Dusty Service: 12,500 miles or 6 months	12,500 miles or 6 months	Every other SDF oil filter change
Commercial Vehicles	Normal service: 25,000 miles or 1 year Dusty service: 12,500 miles or 6 months	Use engine manufacturer's recommendations or 6 months	Every other SDF oil filter change