Hi, I want to change the hydraulic oil in my '93 743B and the book says I need API class SE 10w-30 motor oil. Does it specifically need to me SE rated(?), I am having a hard time finding the SE rating. Any recommendations on what type and brand oils you guys use>? Aslo, does anyone know the price for the Bobcat oil per gallon or qrt or whatever it comes in?? THANKS!