Well, I have had my 04 Rhino for a year and have never bought a filter or spark plug from a dealer. My Rhino has never used any oil and runs 51 mph checked by a GPS. My cheap stuff comes from Wal Mart. I run a Champion Power Sport plug #8809-1 which sells for $2.97. I use the Super Tech oil filter # ST7317 Which sells for $2.07. This filter is a car filter with a little more capacity than the stock size. I run Castrol Syntech oil which I buy in the five quart container which sells for $19.88. As you can tell I never use dealer supplied consumables and save a bundle. Like I said the Rhino now has 1,445 miles on it and has never used any oil between changes and doesnt smoke. Have a goodun!!