I am in need of finding out what hydraulic fluid I should use in my Bobcat 500. The dealer said dextronII but I can't find it anywhere. Checked Napa auto parts store plus Farm & Fleet and Tractor Supply but no luck. Even looked for something with the spelling with the spelling DexronII. What are people using for hydraulic fluid on these older Bobcats and I don't want to call it old as I have 20 years on it. Thank You.