I'm a rider not a wrencher, so please excuse my ignorance on this topic. I purchased my 19' SF Dark Horse w/ the 116 BBK. After reading the owners manual and as many forum threads on engine oil. The one thing that I did not find in either of those mentioned sources is requirements for the 116 BBK, do they follow the same requirements as far as Oil specification grade 20W-40 (manual actually says Indian 20W-40 for 111 Engine). For those that are Mechanically experienced, would greatly appreciate your insight.