Finding out about how to do your own servicing on a Rolls 20 is not particularly straight forward. There are quite a few websites one can visit and the Rolls-Royce car owners handbook does give you a lot of essential information but it’s a dry read and excludes workshop tips and tricks of the trade.
Survivor by Charles Vyse has been an invaluable guide to me and I would recommend it to anyone who owns a RR 20 or 25. Vyse actually published a second book called Reborn which goes into more detail in certain key ares and a life story of a RR 25/30. Armed with these two books, there’s very little extra one needs to know to carry out one’s own servicing. I just wish the weather would improve to allow me to carry out some workshop antics.

Survivor & Reborn by Charles Vyse