1.3 diesel with dpf V 1.3 diesel without - mpg

Anyone fancy doing a comparison on fuel useage within the 1.3. - 75 bhp diesel engine in Doblo's please?

I would like to compare the MPG returns in mine - a 2007 manaufactured hi roof van fitted with a DPF against a car (or van) of a similar era but without a DPF.

Thanks in anticipation.

As a matter of interest over 5000 miles (well run in now ) I have returned 49.47 mpg over mainly local journies of 10 miles or less.

Hi Nec we have an 05 1.3 Family doblo without DPF, and we average about 40 mpg around town and about 47 mpg when going on hoilday loaded up, When we tow our caravan which weighs about 850kg we average 30 mpg, car has done 21000 miles.

I don't mean to sound ignorant but what's a DPF?

diesel particulate filter........stops soot/crap from diesel engines polluting the enviroment.

DPF stands for diesel particle filter and it`s part of the exhaust system on the latest cars to keep the emissions down, hope this helps you beat me T on this post.

Aaaah I see... Isn't that the thing that supposedly cleans itself every now and then but getting really hot while you're driving along?

Yes thats correct, its really a optional extra but wth stricter emission laws its becoming more standard on diesels.

Thanks for that information. At the figures you quote (ignoring the towing figure) - I am doing better than I thought I was with regards to mpg.

I still suspect that the dpf is 'draining' the mpg although that is not apparant so far.

What I really want is another 'anorak' who records all fuel used (brim to brim) to try and get as good a picture as I can - not that I can do anything about the dpf now as all commercial vehicles have to be fitted with one since 2007.

This is one that I came across and copied over which illustrates a bit more as to what DPF's are about. I think this is the one in use on the Doblo as there are no additives. My understanding is that the only way to tell if it is working is to 'plug it in' to the machine which analyses the state of the engine oil?!

In this particle filter system the temperaature of the exhaust gases is increased to 600-650°C. The increase in temperature is implemented through a series of post-injections with consequent post-combustions which, in part, take place in the exhaust manifolds and in the oxidizing catalyzers; these temperature values are more than sufficient to completely burn the particulate accumulated in the filter. To facilitate the combustion process of the particulate accumulated, there are noble metals working as catalyzers on the filter walls.
The system without additives has the advantage of not requiring the supply of additives which, in addition to being a product that is dangerous to health, is also rather expensive. On the other hand, the filter without additive works at higher regeneration activation temperatures. In addition, as a result of the greater post-injection required, filters without additives suffer from some contamination (dilution) of the engine oil. Depending on the number of regenerations and consequently the driving style, the engine oil may deteriorate more quickly than usual as a result of the dilution due to the diesel. The common rail multiple injection system (Multijet) underpins the DPF regeneration method.