wow I was wrong it was 286 g/kWh at 6000 rpm. I think you guys should read the paper. It is SAE paper form 1992.
http://www.rotaryeng.net/Mazda_R26B_US.pdf
I just wish the number they gave was a little better to understand. I could convert it but I am not sure if it would be right. I guess it is 286 grams of fuel per Kilowatt hour.