I'm debating between Torco and Cold Fusion. Torco is $50 less per case; I have used a few of their products, namely their camshaft assembly lube and bearing lube on the engines I build for my Honda. Good stuff. They seem to be newer to the RC industry though.
Great article idea: take 5 of the top fuels, all 30%, using an O.S. VZ-B Vspec II as the base engine in an RC8 or 8eight 2.0, and publish the data (fuel efficiency, hp, top speed, etc).