I run Klotz KL-333 (synthetic) lube in my 2.4 bridgeport. I run 32:1 and have nothing but excellent things to say about it. I turn 7,200 - 7,500 RPM. You see a lot of formula one racers with Klotz stickers on the side of their boats. That should speak volumes about it. My engine builder who was an ex F-1 racer swears by it. You can order off their web site at www.klotzlube.com
Good Luck