I use Anglomoil GEO550 5w40 in my turbo soarer, it's great. High calcium, zinc and 11tbn. Full synth and $45/5l ( when bought by the 20l)
In my bike I have run delo 400 15w40, but may use Alglomoil roadmaster gold 15w50 next change (it's air cooled, xr500). Also have used the delo in fiiends...