AAPEX 2004: AMSOIL Introduces Donaldson Endurance Lube and Air Filters with Nanofiber Technology

LAS VEGAS--Nov. 1, 2004--AMSOIL INC.(R) of Superior, WI now represents the Donaldson Endurance(TM) lube and air filters with nanofiber technology. Donaldson filters are specially designed for GVW Class 6, 7 and 8 over-the-road commercial vehicles including vans, beverage trucks, school buses, box trucks, tow trucks, city transports, fuel trucks, cement mixers, heavy construction cabs, refrigerated vans, and more.

This unique nanofiber technology traps sub micron containment below 1 micron in size (a human hair is 50-80 microns in diameter). Donaldson Endurance air filters utilize a sub micron, ultra-fine web that captures these fine contaminants at a very high efficiency level. Donaldson Endurance air filters from AMSOIL(R) provide the following cost saving benefits:

-- Longer engine life               -- Longer filter life
-- Extends maintenance intervals    -- Twice the distance guarantee

Donaldson Endurance lube filters are made with premium advanced synthetic media that incorporates sub micron fibers in size, shape and fiber diameter. The Donaldson Endurance lube filters from AMSOIL(R) provide the following cost saving benefits:

-- Extended service life            -- Superior engine protection
-- Improved lubricant flow          -- Improved cold starts
-- Reduced operating costs          

Donaldson Company, Inc., headquartered in Minneapolis, Minn., is a leading worldwide provider of filtration systems and replacement parts. Founded in 1915, Donaldson is a technology-driven company committed to satisfying customer needs for filtration solutions through innovative research and development. Our 10,000 employees contribute to the company's success at over 30 manufacturing locations around the world. Donaldson is a member of the S&P MidCap 400 Index and Donaldson shares are traded on the New York Stock Exchange under the symbol DCI.

AMSOIL INC. has been the recognized leader in synthetic lubricant and filtration products since 1972. For more information about AMSOIL synthetic lubricants and performance filtration products contact your nearest AMSOIL distributor, check the Yellow Pages under Lubricants, visit www.amsoil.com or call AMSOIL at (715) 392-7101 or 1-800-777-8491. AMSOIL INC., AMSOIL Building, Superior, WI 54880.