AMSOIL defines normal service as personal vehicles frequently traveling greater than 10 miles (16 km) at a time and not operating under severe service.
AMSOIL defines severe service for gasoline engines as turbo/supercharged engines, commercial or fleet vehicles, excessive idling, first-time use of AMSOIL synthetic motor oil in vehicles with over 100,000 miles without prior continuous use of AMSOIL synthetic motor oil, daily short-trip driving less than 10 miles (16 km), frequent towing, plowing, hauling or dusty-condition driving.
AMSOIL defines severe service for diesel engines as extensive engine idling, daily short-trip driving less than 10 miles (16km) or frequent dusty-condition driving.
See the AMSOIL Product Recommendation and Drain Interval Chart for additional information.
AMSOIL is available at Rivord Repair Center they are open from 7 a.m. to 5 p.m. Monday through Friday. For more information call 715-718-2727 or stop by the center at 317 Tower Ave, Superior Wi 54880