[Christ]

Conn- Believe me, I don't take it as gospel even remotely. I seldom quote or even read anything from Wiki. That particular section was, however, close enough to what I had already known from working on trucks, and was close to what I had read in reports, etc. So I elected to use it instead of searching for a more reputable source.

By the way, gas engines CAN and HAVE run at ratios well in excess of 20:1. FYI. In fact, 60:1 is more likely possible for Gasoline Direct Injection, and 100:1 or better has been reported (I have yet to actually see it documented) in cases where mixture manipulation has been used. (Mixture manipulation refers to the same concept used in Honda's CVCC engines, where dual mixtures were used. One was extremely lean, the other, much smaller volume, was extremely rich. The rich mixture ignites with less spark energy, and the flame front from it ignites the much leaner mixture... timing was critical for engines of this type for maximum efficiency.)