sorry, thats gone right over my head???
20yrs ago it was common for belts to need chanking at 30/40k...car tax was same for all vehicles...cant remember the cost of tax but belt replacement only got expensive if they broke
today...belts commonly do 100k plus, tax is variable based on emmissions...dpf is cheap because of low emmissions...take the dpf out it will be ranked much higher.
think you misunderstood what i was saying...im liking the lack of important information at point of sale in the need for
1/ timing belt maintenence 20 yrs ago
2/DPF maintenence present day
both of which result in huge costs when neglected, that offset a lot of savings at point of sale....