Quite a few of us Westcoast Vincent owners have been using Valvoline Vr1 racing oil for many years now. It was a good choice but it now offers even greater wear protection.
This is the conventional, not the synthetic VR1. The synthetic VR1 did not test well in scar testing.
This is the conventional, not the synthetic VR1. The synthetic VR1 did not test well in scar testing.