hi advice on d p f diesel particle filter

harveybobbles

jase1 wrote: »

Some people report having to change DMFs at under 60K miles. At £700 a pop, this is significant.

It amuses me that people will advise against buying certain models of car because the brake discs cost £40 instead of £20, but dismiss high parts and labour costs when it comes to diesel-powered cars. Very strange.....

I've known people to change cars JUST so they can get one with a £30 VED!

david_cougar

thanks another chat today with salesperson quote on the 10 reg cars they burn off the excess between 1. to 1 and a half. on the rev counter so i do 10 miles a day i wil be fine, he said the car probally now does not have dpf, which is by the way a ford modeo 2 litre tdci estate,and would be impossibile to tell. hope this makes sense out there.

harveybobbles

10 miles a day in a diesel? It wont be upto full working temperature before you switch it all off again! So thats 3650 miles a year in a diesel?! Might be worth just using the bus/taxi/lifts etc to be honest.

And the salesman doesn't know if it has a DPF. Pah! Move on to another garage!

But have a read of this 1st...

http://www.thisismoney.co.uk/money/cars/article-2025590/Is-diesel-car-cheaper-run-petrol-car.html

daveyjp

10 miles a day will kill the EGR valve and the turbo will suffer. EGR isn't expensive, but a pain in the butt when it fails and goes in to limp mode. The bottom line is modern diesels thrive on being used and short trips do them no good.

Weird_Nev

For that milage buy a cheap petrol car. you won't reap the benefits of diesel ownership.

pitkin2020

david_cougar wrote: »

thanks another chat today with salesperson quote on the 10 reg cars they burn off the excess between 1. to 1 and a half. on the rev counter so i do 10 miles a day i wil be fine, he said the car probally now does not have dpf, which is by the way a ford modeo 2 litre tdci estate,and would be impossibile to tell. hope this makes sense out there.

LMAO, does this garage have seriously large windows by any chance, no offence but this sales guy has seen you coming from a mile off. I bet he told you it also does 100MPG too??

Sounds the like sale guys don't have a clue, it may have DPF, it may not have DPF. Does it have the run flat tyres too, those are the ones that never wear out.

As already mentioned by another poster 10 miles will barely get it warm and by the time it does you'll be turning it off, not the best sort of driving cycle for diesel.

patman99

Don't forget, once out of warranty, you can blank-off the EGR and ditch the DPF for a straight through pipe. Doing both these will increase your MPG by about 9%.

Another common upgrade is to replace the DMF with a solid flywheel. Eliminates the chance of trashing the gearbox when the DMF fails.

brokenant

I bought my first modern diesel 2.5 years ago (shogun 3.2di.d). I do a lot of short journeys between 100 yards and a few miles mostly. The dpf light kept coming on meaning I had to go for a half hour trip on the motorway to clear it. After a few times I changed my route so once a week I go on a 15 mile trip on the motorway.
Two years on and I haven't had the light return.
Obviously if it does fail it will cost a bundle (£1000 just for the dpf.).

Notmyrealname

harveybobbles wrote: »

Another person who is fooled into thinking diesels are cheaper to run...

Unless you do about 30,000 miles a year it REALLY isn't worth buying a diesel. At all.

I do about 17k a year. I've had my diesel Mondeo nearly 5 years now. Compared to the fuel cost of the petrol version, the diesel has effectively been a free car.

Notmyrealname

Jakg wrote: »

Why would a DMF make a difference for town journeys?

Remember petrols can have DMFs to...

They get killed quicker. A DMF lasts longest if there's less stress put on it. For those that don't know, a DMF is basically two flywheels stuck together by a flexible compound. Around town you're mostly accelerating or decelerating which are the two things that put the most stress on the flexible compound. The other things are heat generated when riding the clutch and absorbtion of the torque load around 2000 RPM, typically when changing from 1st to 2nd which you're going to do a lot of around town. There's not much chance of doing a constant speed like there is on out of town driving and you're more likely to ride the clutch in town.