I run Omega with extra castor added for ringed, non ringed, 2 and 4 stroke engines.

If worried about messes, use synthetic car wax on Monokote or Ultracote. It makes wiping it clean an easy job. Waxes with organic compounds like carnuba work well too, but the carnuba breaks down much faster. Auri works really well, but I'm not sure if that is still on the market.