Jul 15, · Today, my dealer and I change the hydraulic system oil and filter in my 09' Super Z. I went with the Amsoil 20W Synthetic motor oil and the Hustler OEM hydraulic filter (I personally will never use an aftermarket filter here). Hustler® FasTrak General Service Manual South Ridge Road Hesston, Kansas REV E The Engine Owner’s Manual provides information regard ing the U.S. Environmental Protection Agency (EPA) and the California Emission Control Regulation of emission systems, maintenance and warranty. Keep Engine Owner’s . The Hustler Z is a three-bladed commercial riding lawn mower manufactured by Power Pro Equipment. Its rear drive wheels are hydraulically operated by separate pumps powered by the gasoline engine. These pumps share a common hydraulic oil reservoir and filter. Power Pro recommends checking the hydraulic oil every week or after every .