While the technical gurus wrestle with the engine tests detailed so well by David McFall (see PC-10, A Multimillion Dollar Bet, September), there is yet another high-stakes game being played in the world of heavy-duty motor oils, one that no one wants to talk about. That is, the marketing strategies oil companies will use to introduce PC-10. For the majors, this too is a multimillion dollar bet – with the potential to redefine who the leaders and laggards are in HDMO. One would think that when a new specification is approved the majors simply start to produce the juice and move it into the market. But as some painfully found when they rushed to be first to market with GF-4 passenger car motor oil, its not quite that simple.