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I think it's getting much harder to make a case for small diesels in cars. Price of diesel and much improved fuel economy in petrol engines and higher servicing costs mean there really is no substantial difference in running costs.
The one thing that diesels excel at is working under load. If you needed to tow a load a diesel was the best choice but the modern small diesels are made so light with a high Aluminium content that they frequently cannot tolerate the higher thermal output generated by towing. I used to deal with an engine machine shop in Melbourne. Last time I was in his shop he had a stack of Toyota KD engines a horse could not jump over, all waiting to be rebuilt, all failed due to overheating.
So if they are no cheaper and don't tolerate heavy loads what is the point?
Perhaps you like the smell of diesel on your hands after you fill up?
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