as Much as I hate to say this Dino is my Choice I use Castrol T3 for air cooled Motorcycles
I used to use vavoline
but all oil today is different, some additive soap base or aminal fat even veggie oil's
with orginal gasket still comming from venders and as a mechanice I see reasons to avoide some oils some will seep some cause wear or alows wear and even the BEST Syn like Amsol I took abart BMW's with 120,000 mile of use from orginal with no part useable meaning a 1 time use of piston and cylinders
chose your poisen and ride safely