[Dinksdairy]

I bought a 04 rr and it has 2600 miles now, i'm curious what oil is in the bike from the factory? Syn or Castro?

 

[blue_rrockit]

i think that depends on the dealership you bought it from. i doubt it is synthetic though.

 

[alaska cajun]

It would be my guess and i'm just pulling this out of my ear here......Honda GN4

 

[OveRReV]

definitely mineral based engine oil.