On the other hand, many newer diesels have cam chains instead of belts, which will just mean the big service at 100k miles (say) is a DPF service instead of a cam belt service. Costs are comparable (This is assuming the cam chain is trouble free and lasts forever, which isn&#x27;t entirely true of course).<p>Even if the DPF is abused by short trips, there isn&#x27;t even a scheduled inspection until over 100k miles, so if there are no noticable issues with it, it might just do a worse job for the environment but not incur higher ownership costs.<p>Over half of new cars here (Sweden) are leased by companies, and bought with very strict CO2 emissions guidelines, but no other guidelines. That means you either have to buy a hybrid or a diesel, there is basically no way you can get under 120g&#x2F;km otherwise. Since there is of course also a price treshold, the hybrids are usually out of the question and the end result is that most new cars will be diesels.