Humbug, what oil is recommended for the 03? My 04 manual recommends Mobile 1 4t.
Try here.
CYCLE GEAR CLICKY
I was at the local store here and they carried it. I saw on there site, if you goto store locations, they have a few stores in Florida.
I don't think, not using M1 4t will do anything bad, that is just their rec for some reason. As long as it is a synth and 10w40. Motul is suppose to be a good oil, my friend uses that stuff in his 05- Duc 999 and likes it.