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Old 09-02-2018, 05:49   #1
UltraObamaX
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Angry Mot 2018

Anyone else think the new MOT rules are stupid?

I mean I can't legally drive a car which has had its DPF removed, but i can legally drive a 40 year old car which probably puts out a lot more pollutants.

Also, I think DPF is pointless, as to recharge it, you have to heat up the exhaust to burn off the soot. This means high revs, low gear, which is uneconomical driving, and is therefore bad for the environment, and your MPG.

Particulates probably are really harmful, but then so is smoking, WIFI, microwaves, processed food, UV rays, pretty much everything.
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Old 13-02-2018, 16:28   #2
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Quote:
Originally Posted by UltraObamaX View Post
I mean I can't legally drive a car which has had its DPF removed, but i can legally drive a 40 year old car which probably puts out a lot more pollutants.

Also, I think DPF is pointless, as to recharge it, you have to heat up the exhaust to burn off the soot. This means high revs, low gear, which is uneconomical driving, and is therefore bad for the environment, and your MPG.
If it is OEM fitted it's got to be there.

Joe Public needs to have more of an understanding of how the system works and apply it to their lifestyle. Urban dweller then diesel is probably not the best way to go from a DPF perspective, motorway road king then a diesel will probably suit. Somewhere between the two then factoring in a regular run with 3k in revs over say a 20 minute period is advisable.

DPF's are a pain and we know why they are there. They are also something to factor in on a decision making process when buying a diesel.

According to Honest John the DPF will only last an estimated 80k-120k before they need either replacing or cleaning. Not ideal but that's the way it is.

Before DPF's it was the moan about EGR's and before long it will be SCR's too. Quite simply you pays yer money and you takes your choice.

Finally, if it helps, I have been using Wyns DPF regenerator once a year following comments from a taxi owner (12 x Avensis) on the Toyota forum. Before this he had DPF lights on all the time and now with a dose every 6 months, nothing in three years on all vehicles apparently.

HTH
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Old 13-02-2018, 20:08   #3
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Quote:
Originally Posted by UltraObamaX View Post
Anyone else think the new MOT rules are stupid?

I mean I can't legally drive a car which has had its DPF removed, but i can legally drive a 40 year old car which probably puts out a lot more pollutants.

Also, I think DPF is pointless, as to recharge it, you have to heat up the exhaust to burn off the soot. This means high revs, low gear, which is uneconomical driving, and is therefore bad for the environment, and your MPG.

Particulates probably are really harmful, but then so is smoking, WIFI, microwaves, processed food, UV rays, pretty much everything.
Nope, not stupid at all.

Many people will think that removing a DPF is the stupid thing to do.


What I would say, is that most people do not understand how a DPF works and how what they may need to do to help it work effectively. (let alone understand if they should buy a diesel or a petrol car)
However, that's not to say its the publics fault, as frankly the education has been appalling, and why is there no indication to the driver when an active regeneration is taking place. (or better still also state when one is coming up)
Yes I know that many people can tell as the car doesn't quite drive the same, however most people will not often notice, but lets at least give people the option to help the process, for example seeing the regeneration is taking place, drop down a gear, perhaps complete that longer drive to the shops or a friend you need to do to coincide with the regeneration (that's when the prewarning would be useful)

Regards older cars not meeting modern standards, unfortunately there is not too much that can be done without a crystal ball or time machine. It would be unreasonable to say to people that own older cars that 'sorry I know the car met standards at the time and you may even have been encouraged to buy that vehicle based on government policy and thinking at the time, but time moves on so you can't use it anymore'... Although there are some rules in already, or coming in, eg the congestion charge and environmental zones in London.. so there is some work making it more difficult to use older vehicles.

And ultimately, surely using cars to their life potential has the benefit of less resources, energy, transportation etc etc is used in manufacturing of the car in the first place. Some of the current electric cars for example will never recoup the extra resources and pollution required to make them over a petrol or diesel car, however they are doing a good job in turning peoples opinions to new tech so that when the tech gets to the point they are of benefit people will be more willing to use it.

oh and lets not forget, petrol engines also product particulates, just smaller so you can't see them...

Last edited by andycupra; 13-02-2018 at 20:13.
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Old 14-02-2018, 10:24   #4
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no indication to the driver when an active regeneration is taking place.
One of my biggest gripes about the system imo

The dumping of unspent fuel through the bores 'because driver is unaware' causing oil contamination is ridiculous. Totally avoidable.

Are the manufacturers that bothered after fulfilling their warranty period? Of course not.

New car sir.....
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Old 14-02-2018, 11:11   #5
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Quote:
Originally Posted by UltraObamaX View Post
Anyone else think the new MOT rules are stupid?

I mean I can't legally drive a car which has had its DPF removed, but i can legally drive a 40 year old car which probably puts out a lot more pollutants.

Also, I think DPF is pointless, as to recharge it, you have to heat up the exhaust to burn off the soot. This means high revs, low gear, which is uneconomical driving, and is therefore bad for the environment, and your MPG.

Particulates probably are really harmful, but then so is smoking, WIFI, microwaves, processed food, UV rays, pretty much everything.
So you had your dpf removed and now you're pissed that you have to have it refitted? Oh dear.

Same as all the petrol boys who have their cat removed and then complain when it comes to mot time and they either have to refit it or find a place who can't see it's been removed. All the while polluting the environment more than the car was designed to do...
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Old 14-02-2018, 13:22   #6
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Nice to see some old faces sticking their oars in

I hope you've all been keeping well.

Re the DPF issues, these had frightened me off buying another diesel despite my real world preference for them. The Leon isn't going to last forever. However, I do now feel confident that a future replacement will be a diesel after four years of running around in a DPF'd Skoda and no grief.

Yes you have to play the game (decent fuel plus additive, proper runs and an annual bottle of DPF regenerator going through the tank), perhaps a little overkill, but given its life (mostly local runs), still no ball ache. Touch wood as anything can happen of course.

I remember all those years ago when EGR's came in and the constant moans from owners with cacked up valves. Despite nearly 14 years of ownership, the EGR has never had to come off the Leon. Luck possibly, but my take on it is 14 years of good quality fuel plus Millers additive from day one. I may be wrong but who knows.

You have to jump through some hoops but playing the hand as best you can is all you can do.
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Old Yesterday, 21:52   #7
UltraObamaX
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Regards older cars not meeting modern standards, unfortunately there is not too much that can be done without a crystal ball or time machine. It would be unreasonable to say to people that own older cars that 'sorry I know the car met standards at the time and you may even have been encouraged to buy that vehicle based on government policy and thinking at the time, but time moves on so you can't use it anymore'...



Same as my car being a 2009, it was designed to comply with regulations at that time, how can it be expected to meet new standards?

BTW i still have my DPF.
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Old Today, 12:55   #8
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Quote:
Originally Posted by UltraObamaX View Post

BTW i still have my DPF.
So what's your problem then? Why you complaining you can't drive a car with it removed?
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