Hi gents, coming up on my first 50 hour service on my little RK24 (25hp Yanmar 3 Cyl) tractor. Of course its a TYM made unit but all branded Rural King so they suggest only their fluids in the manual which tend to be on the cheaper side of things. I want this little tractor to last a long time of course so what say you guys? I'm thinking JD HyGuard? Any other top quality brands out there?