Quote:
Originally Posted by RedDevil
The old diesels have an appalling fine particle content in their exhaust gas, many times worse than gassers of their own age.
City centers get closed off for traffic if the rate goes up too high, several cities are seeking to ban lorries and 'old' cars or even all cars just to keep air pollution below the desired max level.
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When I went to Uruguay last month I saw many old Diesels and only one was puffing a considerable amount of black smoke, but it was at a mechanic shop to get that issue solved. Anyway, due to their adaptability to cleaner-burning fuels such as biodiesel and vegetable oils (either straight or waste cooking oil) I'd still rather get an old Diesel instead of a hybrid. There is also the higher cetane rating in Diesel fuel nowadays that also reduces considerably the amount of soot.
Anyway, with heavier taxes on old Diesels and the reliability issues from the emissions-control devices in the newer ones, it's not hard to understand why CNG and biomethane are increasing its market share in Europe...