Guys,

Thanks for your suggestions. Finally decided to use Delo Sports synthetic blend, 15W-40, API CH-4, JASO DH-1 ratings. The LC80 should be happy with this engine oil.

On one hand, I still think that mixing Delvac 1 with a conventional oil is a logical idea, what with this statement, in reference to the technical specifications of Delvac 1: "It is also fully compatible with conventional oils." What matters most, I think, is the choice of the conventional oil that should not enhance additive clash with those in Delvac 1. For the moment, I will put this idea at the back burner, for further evaluation.