I just received an advertisement from a farm supply store chain where they are featuring Shell Rotella Tractor Transmission & Hydraulic Fluid for $10 off plus a $10 rebate from Shell. I believe most people would say that Rotella diesel engine oil would be a quality oil. My question is would Rotella Tractor Transmission and Hydraulic oil be the same quality????? Would it be better than the yellow 5 gallon pails or black "farm store" 5 gallon pails of universal trans/hydraulic oil???? I assume the Rotella has a "universal rating" for use in Deere, Case, and Case/IH? Looking for your thoughts. Time to stock up for spring/fall. Thanks.