I have a 1997 VW Golf Diesel and have been a happy Greasecar customer since October, 2007. I installed the system, with the microcontroller (Copilot), myself (I'm only moderately mechanically inclined), and I went with the larger 15 gallon tank. Since October I've driven approximately 15,000 miles on waste vegetable oil, and it's been smooth as silk, with no issues. I live in a cold climate in Ontario, Canada. I've got a French Fry stand guy giving me his oil.
Randall Webber's Greasecar Jetta. Randall included some photos and info about his filtering setup.
Here it is, simple and workable, the filter came with the brass ends, I had to purchase the PVC connections to hook the 3/4 inch I.D. clear vinyl hose to. I bought the garden hose ends at the hardware store also ( like 79 cents each, the PVC adapters were 29 cents a piece). Do NOT heat your oil past 140f the rubber seals for the garden hose connections don't like it. I usually filter 10-15 gallons per filter cartridge.
Tony Thorpe's Jetta TDI uses Biodiesel as its start up fuel and Grease as its main fuel. Tony uses the Jetta for daily driving while his Greasebus is for touring the country with his band. The Jetta's been burning grease for a year. Check out Natures First Law