Hi Iboomalot:

___NOx is a precursor to SMOG as well. Your Jetta no matter the ability to burn Bio-Diesel is still a large emitter compared to most. I can dig up some specs for you if you would like but I am sure you already know how bad it is

___Now on to the DB. When you fill, make note of the distance traveled and gallons pumped. You can recall the rest as you upload your tank data. The RHMDB makes the whole process rather simple as it should. Once uploaded, comparison between your own diesel and hybrids as well as non-hybrid SI-ICE based automobiles are at your fingertips.

___Good Luck

___Wayne R. Gerdes
___Hunt Club Farms Landscaping Ltd.
___Waynegerdes@earthlink.net