Non DPF diesel family cars?

frankie

Hi

I own a 2.0 Mazda 6 diesel (06 plate). When the DPF system regenerates, any unburned fuel is returned to the sump thus diluting the engine oil and giving potential for all sorts of problems. It is vital to keep checking the oil level to ensure the sump doesn't over fill. IMHO it's a silly system.

Any way my first question is: are there any cars with DPF systems that do not return fuel to the sump and dispose of the grot in some other way?

Secondly, are there any family size cars that offer diesel engines that do not use DPF systems and are there any 'downsides' to these?

I only do about 10-11K pa, so I know that is low for a modern diesel and I am aware that the DPF needs to operate, I'm looking for an alternative car, other than an obvious change to a petrol engine, that will cope with the relatively low mileage and yet will tug a caravan occasionally, so probably in the 1.9 to 2.0 engine size.

Thanks

Pew_Pew_Pew_Lasers!

You don't need a diesel-engined car, you don't do enough miles. Buy a petrol, its cheaper.

daveyjp

10,000 a year with a DPF diesel isn't a good idea regardless of how the DPF operates, unless these 10,000 miles are made of of infrequent longer trips you are potentially going to have problems.

Diesels without a DPF - manual X type (2.0 or 2.2), older PD technology diesels as fitted to VW, Audi, Skoda, Seat 1.9 or 2.0 (but only the 140PS 2.0), various Fords.

Hintza

Pew_Pew_Pew_Lasers! wrote: »

You don't need a diesel-engined car, you don't do enough miles. Buy a petrol, its cheaper.

+1

Modern diesels have too many potential problems made worse by low mileages. Only buy a diesel if you mileage warrants it and yours doesn't.

casper_g

Surely the low mileage won't be a problem if the miles consist of infrequent long motorway trips? I don't use my diesel car at all during the week, then do a 6-hour motorway round trip at the weekend every couple of weeks.

frankie

Thanks for the replies so far.

I know that my mileage isn't really suitable for diesel engines. When I initially bought the car I had to factor in caravan towing and so that's why I chose diesel.

What I didn't know when I bought the car was that the regen of the DPF was going to dump fuel into the sump!!

I believe there are alternative DPF systems that do not do this fuel dumping. I am quite willing to do the occasional hard drive in order to do a 'burn' in order to do a manual regen as long as it means not diluting the engine oil.

Isn't progress wonderful! I remember when we could do our own oil changes without having to go to a garage and get the car plugged into a computer!

goldspanners

frankie wrote: »

Hi

I own a 2.0 Mazda 6 diesel (06 plate). When the DPF system regenerates, any unburned fuel is returned to the sump thus diluting the engine oil and giving potential for all sorts of problems. It is vital to keep checking the oil level to ensure the sump doesn't over fill. IMHO it's a silly system.

Any way my first question is: are there any cars with DPF systems that do not return fuel to the sump and dispose of the grot in some other way?

i think you've been misinformed of how DPF work. heres a link ( i know wiki isn't gospel but it will do here).

if the unburnt diesel was being mixed with the engine oil in the sump this could prove disasterous very quickly.
it goes nowhere near the sump,it comes out the exhaust.

goldspanners

f**k me! every day is a school day!

what are mazda playing at with this system?

sorry op, i seem to be the one who is misinformed about mazdas DPF.

Kilty_2

Get a hefty turbo petrol instead imo - suitable for towing and a lot less problems on lower mileage.

Obviously more expensive to run in fuel terms but it's all relative.

gilbert_and_sullivan

Goldy there's been threads running to hundreds of posts about these Mazda Diesels in Honestjohn, mainly in technical section, the whole thing reads like a nightmare, engines totally destroyed, car effectively scrap and no come back...totally amazed they can sell the things.

goldspanners

gilbert_and_sullivan wrote: »

Goldy there's been threads running to hundreds of posts about these Mazda Diesels in Honestjohn, mainly in technical section, the whole thing reads like a nightmare, engines totally destroyed, car effectively scrap and no come back...totally amazed they can sell the things.

until today i was totally unaware of it. why would the unburnt fuel be dumped in the engine oil sump? the oil will be thinned out and could potentially over fill the sump causing a hydraulic affect in the cylinders blowing engines up ( which im guessing is whats happening)