List of new diesels that don't have DPF

c1tro

c1tro

c1tro

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As these are generally costly to replace I think buyers looking for a new diesel would rather have one without this. Any models that fit the box?
 
If used for the correct purpose (I.e. long journeys) then there is little issue with DPFs - the issue is with people who bought them purely for mpg and cheap ved, but then still used them for school runs and other short journeys that lead to them clogging.
 
Will Gill said:
http://www.dpfproblems.net/cars-without-a-dpf/

Although they don't look very new
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Out of date unfortunately.

Armageus said:
If used for the correct purpose (I.e. long journeys) then there is little issue with DPFs - the issue is with people who bought them purely for mpg and cheap ved, but then still used them for school runs and other short journeys that lead to them clogging.
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Whatever you do it will need replacing as regenerating can't go on forever.
 
Armageus said:
If used for the correct purpose (I.e. long journeys) then there is little issue with DPFs - the issue is with people who bought them purely for mpg and cheap ved, but then still used them for school runs and other short journeys that lead to them clogging.
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I do 25k a year and mine still failed. According to main stealer you've got to regularly "take it out for a fast run" , motorway speeds keep the revs too low for a regen.
 
Needs given a good Italian tune every so often to get as much exhaust gas flowing through it as possible. Flooring it up a steep hill should do the job.
 
mrgubby said:
I do 25k a year and mine still failed. According to main stealer you've got to regularly "take it out for a fast run" , motorway speeds keep the revs too low for a regen.
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Correct. I think the actual number was like get the car up to 60mph+ for a certain period of time.

Again like Armageus said, it is a complete non issue if you drive a diesel for its intended purpose. Also always let it regen and never leave/turn off the car when its doing a regen because all that will do is tell the car to try again next journey.

I never once had any DPF issues in any of my cars as I always let it regen when it wanted, and usually driving 50mph + on the country roads around here (barely any city/town driving).
 
Mine got blamed on too many miles on the motorway at less than 80mph, I think they recommended a regular 10-15 miles using over 3k revs
 
How do you tell whether it's regenning or not? I'm new to diesel ownership with an E350 V6 Merc diesel.
 
c1tro said:
Whatever you do it will need replacing as regenerating can't go on forever.
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Yes, as eventually they get filled with ash (the byproduct of regenerating and burning off soot). However, with the driving style they are designed for, they will reach their service life, which can be 100k miles or more depending on manufacturer.

mrgubby said:
I do 25k a year and mine still failed. According to main stealer you've got to regularly "take it out for a fast run" , motorway speeds keep the revs too low for a regen.
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mrgubby said:
Mine got blamed on too many miles on the motorway at less than 80mph, I think they recommended a regular 10-15 miles using over 3k revs
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Absolute load of rubbish - DPF regen is not going to be designed for conditions that aren't legally achievable. In most cases the car "passively" regenerates anyway assuming exhaust gas temperature is high enough. It is only the "active" regenerations that are a concern, due to needing to run for a specific amount of time, and needing to be done at specific rpm/speed/temperatures. On VW/Audi's it is something like above 38mph that "active" regens can take place.


c1tro said:
New Honda's don't have a DPF.
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Pretty sure they do - however newer engines in theory have better DPFs, as the process has been refined.
 
Jez said:
How do you tell whether it's regenning or not? I'm new to diesel ownership with an E350 V6 Merc diesel.
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If a "passive" regen you probably won't, an "active" regen may show a slight increase in rpm, and a slight drop in instant mpg, due to burning more fuel to raise exhaust gas temperature
 
Jez said:
How do you tell whether it's regenning or not? I'm new to diesel ownership with an E350 V6 Merc diesel.
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Depends on the car but doubt you'd notice when driving. I notice it when the engine is idling if I have come to a stop/parked. Instead of sitting at 800 rpm it will sit at about 1100rpm.

Also on the TT TDI the noise of the exhaust would change, it actually made the car sound a bit more bassy...which I liked but I'm sure it was just a fluke with that car.
 
Once or twice it has randomly downshifted to 6th (7 speed box) while cruising for a while, I wonder if that was it trying to regen? I wondered wtf was going on at the time as the car doesn't have any faults stored. Perhaps that was what it was doing now you mention that.
 
Armageus said:
Absolute load of rubbish - DPF regen is not going to be designed for conditions that aren't legally achievable. In most cases the car "passively" regenerates anyway assuming exhaust gas temperature is high enough. It is only the "active" regenerations that are a concern, due to needing to run for a specific amount of time, and needing to be done at specific rpm/speed/temperatures. On VW/Audi's it is something like above 38mph that "active" regens can take place.
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That's Main Stealers for you :)

I was told that "The system will not get hot enough on a motorway in 6th gear to do a regen"
 
My Astra GTC 2.0 CDTI I have owned from new (~10 months) and put 13500 miles on it. Every now and then the mpg drops a smidge but that could be for various reasons. The dash DPF regen light has never come on.
I do 40 miles each way to work, 90% of which is dual carriageway. Therefore I assume it is passively clearing itself out.
I doubt I shall ever have DPF problems.
 
mrgubby said:
That's Main Stealers for you :)

I was told that "The system will not get hot enough on a motorway in 6th gear to do a regen"
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I guess a change down to 5th (or maybe 4th) would do the trick then. :)

P.s. Hi! :)

I tend to run my cars to about 8-10k miles and then swap and I've never noticed a regen happening. Most of my miles are on the motorway at 60-75. I dont know if it's done one and I've not noticed, or if it's not even done one!
 
I owned an A6 that I took from 40k miles up to 120k miles with mainly motorway/A road miles and never had a single issue with the DPF.

If not having a DPF is a huge concern then just factor into the cost of buying the car having it removed. Although it seems the majority of people that have issues with them are because they should have bought a petrol!
 
Armageus said:
If used for the correct purpose (I.e. long journeys) then there is little issue with DPFs - the issue is with people who bought them purely for mpg and cheap ved, but then still used them for school runs and other short journeys that lead to them clogging.
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I totally disagree with this statement, i have owned a Diesel engined cars since 2004 and not once have I had any DPF problems and my daily run has never changed of 4miles each way(1.5 miles of M/way). My new car is going to be a V40 CC 1.5 turbo petrol, the only reason I have gone petrol this time is because I can see trouble ahead for diesel cars with the governments ideas that diesels are now the spawn of Satan, I can see at least 10p per Ltr added to the price of diesel in the next budget to steer people back to petrol cars.
 
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