Replacing the PTO shaft on my 1996 Massey Ferguson 231 tractor and want to replace hydraulic oil with new oil. I have read that it takes Permatran III 10W30 hydraulic oil. I cant seem to find many places that sell it in my area. We have several Tractor Supply stores around here but they don't have the Permatran III oil. Is there a comparable oil that is a good replacement for the Permatran III oil. Thanks for the help. Have A Blessed day