So I went to Repco to pick up some oil for my up-coming oil change, and they didn't have much in the way of fully synthetic oil. The staff member I was talking to said he often uses Mobil 1 SuperSyn 15W-50 in his Stagea 260RS, as it's designed for high-performance (motorbike) usage.
Seems like a stupid question, and Googling it seems to suggest it's fine, but is there any harm in using it in my 20V? Thoughts?