Why does the manual say you can use J20C in a 1025R?

I cannot imagine that the temps for me actually get low enough for me to have to use J20D. Seems to me that the J20C would work better especially with the hydraulics on the BH. Ridiculous how fast it leaks down. Since the manual says you can use it, can you use it, or is this just another one of their wonderful "typos"? They need someone that knows how to write manuals down there. Ugh!:gaah:

Before I buy the technical maintenance manual, are they written as badly?