deere actually has 4 different offerings of oil;
plus 50 hdeo; 10w30, 15w40, 0w-40 the plus 50 designates 50% extended drain intervals on jd engines with jd filters
torq gard supreme; hdeo for standard drain intervals; 5w30,10w-30,30, 15w40
plus 4; it is their automotive offering available in 5w30, 10w30, 10w-40,
turf-gard; 5w30,10w-30,10w-40,15w-40, and 10w30 break-in
i've been using their plus 50 for over 15 years with excellent results(several used oil analysis posted in hdeo section)
up until a couple of years ago i also used their plus-4 automotive oil, but with the availability of motorcraft 5 qt for 11.50 (5w-20)i save a little.
whatever the op is planning on using any deere oil in rest assured all of their oil holds up very well