I have found that if I use a level on the trunk luggage rack, and put shims under the center stand to level the bike,3qts 22 oz will have the oil at 1/3 full in the sight glass I have used shell rotella t6 5w-40 with no problems on my '99 XII I went to a full synthetic on my GS1100GK since oil testing showed conventional oil broke down due to the high oil temperature .I have stayed with it on my XII,but I doubt it is necessary on this bike due to water cooling keeping the engine cooler than the Suzuki.
TOO FUNNY LOREN......... It was a pleasure meeting you at the LOGAN rally and getting to know you a little,,,, I can see you in the cold months in your workshop in farm/jelly land with your level and ur shims doing what us gearheads do to keep the juices flowing till it's our turn to ride !! hope to see ya at the NC rally 2014 ,, as we plan on being there. ....tony