This isn't about gasoline vs diesel, but rather biodiesel vs diesel: just got back from the emission testing station and the guy gave me the evil eye, as if I cheated or something. He said "what'd you do to your car?".

Turns out the emissions are nearly a quarter of the output since my last test two years ago when I was using straignt petroleum based diesel, compared with the 100% biodiesel I'm running now.

wow