GM at work: < http://www.coskataenergy.com/ > < http://www.chicagotribune.com/business/chi-mon_garbage_0114jan14,0,5744268.story > < http://www.treehugger.com/files/2008/01/gm_banks_on_coskata.php > And we'll do it with a low parts count, two valves per cylinder, pushrods and less power wasted in DOHC. -- pj Sophisticated engines are like sophisticated people --- they don't have to work.