Lynn and Bill,

I googled it, which I should have done initially and some sites stated it had been around for about 30 years. I guess they didn't really need it then.  I tell my Son, back in 1967 I remember getting fuel for 5 cents a liter or 20 cents a gallon - he can't believe it. I guess that's 40 years ago, but you know what I mean. Does anyone remember what it cost in the US in 1967.

 I had a look at one site and they showed a computer generated fuel burn progression, HCCI was a lot faster, and in all areas at the same time. One site suggested it worked best with DI.

George (down under)