Originally Posted by ever_green
Yeah the new stratified charge lean burn Hondas might help, but the new Prius can get pretty good mileage on highway without lean burn. Therefore I personally don't see the point.
Well, lean burn is better than cooled EGR like I mentioned for attaining complete combustion. Of course, the biggest problem is getting rid of the NOx, and the current NOx traps are not a good solution.
Since you've experimented with this, do you mind sharing your fueling tables? I'm thinking about getting a BRZ and I'm super excited to fiddle with the ECU (that is, lean burn!). Just to get an idea of how lean you can go at what speed.