I get ~197g CO2/mile, unless your mile is different than mine.
~122g/km at stated 45MPG.
oh also i remember why i mentioned the water wheel. this doesn't take into account the manufacture of the car, nor any other "externalities" and that's fine, but when you say 148g/mile it sounds like that's all included.
Perhaps you meant it as a gotcha, and if so, ensure your value is correct, as i don't think it was. 197 if ~8900g/gallon of gasoline is correct. I couldn't get a quick answer to if RON 95 is fundamentally different than say 91 octane in the US, which some pages assures me means the same thing. If so, it is closer to 200 than 150 grams per mile.