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The lounge Relax, take a break from photo and camera talk - have a chat about something else for a change. Just keep it clean and polite!

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  #196  
Old 10th December 2018
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Re: The Peugeot Diesel Pollutant Saga

I recently changed my 2L diesel (45mpg, 180.00 pa tax) for a 1L petrol (38mpg, 30.00 pa tax). How can this be right?
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  #197  
Old 10th December 2018
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Re: The Peugeot Diesel Pollutant Saga

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My outside air temperature reading looks OK.

Harold
The outside temperature sensor is different to the incoming air temperature sensor, which is usually fitted somewhere between the air filter box and the engine's inlet manifold.

With regard to the AdBlue fluid, this is injected into the exhaust system in tiny quantities whenever the engine is running. It isn't needed for regeneration.

However, the DPF must have regenerated at some point otherwise it would be clogged solid. Maybe the ECU's history was cleared by the garage when you had problems last year?

Regeneration usually takes place every 500 - 850 miles apparently, depending on driving style, etc.
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  #198  
Old 10th December 2018
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Re: The Peugeot Diesel Pollutant Saga

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I recently changed my 2L diesel (45mpg, 180.00 pa tax) for a 1L petrol (38mpg, 30.00 pa tax). How can this be right?
Because mathematically, and under test conditions it produces less CO2 per kilometre driven than you old diesel. NOX output is also lower which I think affects the tax band for petrol Vs diesel.

We have a 1.4 Corsa (petrol) which is supposed to do around 58 MPG overall, but it struggles to do 40 MPG except on a very long run. Apparently this is quite normal.
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  #199  
Old 10th December 2018
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Re: The Peugeot Diesel Pollutant Saga

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I recently changed my 2L diesel (45mpg, 180.00 pa tax) for a 1L petrol (38mpg, 30.00 pa tax). How can this be right?
It was a blip, I did the same but with the opposite effect, 2l diesel, 30 tax to 1l petrol, 140 tax.
The recent tax changes have started (whod have seen it coming! ) to swing the pendulum back in favour of the gummint once again.
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  #200  
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Re: The Peugeot Diesel Pollutant Saga

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Because mathematically, and under test conditions it produces less CO2 per kilometre driven than you old diesel. NOX output is also lower which I think affects the tax band for petrol Vs diesel.

We have a 1.4 Corsa (petrol) which is supposed to do around 58 MPG overall, but it struggles to do 40 MPG except on a very long run. Apparently this is quite normal.
Thanks Nigel. Mathematically and under test conditions says it all!

I must admit I was hoping for rather more than 38mpg but taking into account the lower tax and lower fuel price I probably won't be any worse off. Until they think of some other way they can justify to make us pay more for choosing not to use the public transport that isn't available...
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  #201  
Old 10th December 2018
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Re: The Peugeot Diesel Pollutant Saga

If my (petrol) Alfa Romeo had a manual gearbox it would be 110 tax. As it's automatic it's 30. Crazy!
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  #202  
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Re: The Peugeot Diesel Pollutant Saga

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If my (petrol) Alfa Romeo had a manual gearbox it would be 110 tax. As it's automatic it's 30. Crazy!
If you look at the figures you will probably find the CO2 emissions are slightly lower; just enough to put it into a lower tax bracket.
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  #203  
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Re: The Peugeot Diesel Pollutant Saga

Yes, that's exactly the case. The automatic is 1g/km of CO2 lower. It just shows the craziness of the system - put the tax on fuel and people who pollute the most will pay the most.
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  #204  
Old 10th December 2018
Harold Gough Harold Gough is offline
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Re: The Peugeot Diesel Pollutant Saga

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Yes, that's exactly the case. The automatic is 1g/km of CO2 lower. It just shows the craziness of the system - put the tax on fuel and people who pollute the most will pay the most.
As my car is French-made, I can put on a yellow jacket and pay no tax at all!

Harold
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  #205  
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Re: The Peugeot Diesel Pollutant Saga

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As my car is French-made, I can put on a yellow jacket and pay no tax at all!

Harold
Yeah, but you might have to burn some sheep to really get your point across.
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  #206  
Old 10th December 2018
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Re: The Peugeot Diesel Pollutant Saga

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Yeah, but you might have to burn some sheep to really get your point across.
Lamb and mint sauce is my favourite.

Harold
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  #207  
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Re: The Peugeot Diesel Pollutant Saga

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Lamb and mint sauce is my favourite.

Harold
But not badly cooked in the middle of the road by a Frenchman in a yellow jacket surely!
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  #208  
Old 10th December 2018
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Re: The Peugeot Diesel Pollutant Saga

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But not badly cooked in the middle of the road by a Frenchman in a yellow jacket surely!
The French would never serve with mint sauce. How do you cook lamb in a yellow jacket? Do you stuff the pockets with rosemary?

Harold
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Re: The Peugeot Diesel Pollutant Saga

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The French would never serve with mint sauce. How do you cook lamb in a yellow jacket? Do you stuff the pockets with rosemary?

Harold
Sous vide of course.
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  #210  
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Re: The Peugeot Diesel Pollutant Saga

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Originally Posted by Zuiko View Post
Thanks Nigel. Mathematically and under test conditions says it all!

I must admit I was hoping for rather more than 38mpg but taking into account the lower tax and lower fuel price I probably won't be any worse off. Until they think of some other way they can justify to make us pay more for choosing not to use the public transport that isn't available...
Driving patterns have a big effect on fuel economy; possibly even more so than driving style.

Our little Corsa is seemingly up to temperature within about three or four miles, but the MPG is poor unless we use it for much longer journeys; which is not what most people buy a Corsa for really.

My wife drives almost exactly ten miles each way to and from work on mostly main-ish roads. Traffic is not usually a problem, but overall MPG is rarely better than 40 MPG. However, when we have used the car for much longer journeys (100 miles plus) it will return 50 + MPG.

There are a couple of things you might like to try. Firstly we find that Esso and Shell unleaded provides a good 2 - 4 MPG improvement over supermarket fuels. Secondly, a dose of Redex in each tankful also seems to help. It only had 6,000 miles on the clock when we bought it, and 20,000 miles now, so it is still virtually new.

Our daughter 'inherited' our old 1.6 16V Mk V Astra, which like the Corsa struggled to do 40 MPG, although it is a bigger, heavier car with a more powerful engine. However, with a dose of Redex added to Shell Regular Unleaded it manages 46 MPG overall, with 50 MPG on the long runs to university and back.

(Wilco usually sells Redex for 2 a bottle. Tesco also have offers on it from time to time.)

You might also look into having the engine re-mapped. Apparently much of the problem is that fuelling of petrol engines is not individually tuned, but rather the ECU is set to 'safe' air/fuel mixtures, which means that rather more fuel is injected than is needed. (Lean mixtures tend to run much hotter, but overly-rich mixtures waste fuel and cause flat-spots.)

I have been quoted around 200 to remap the Cora, which is claimed to iron out the many flat spots and provide at least 10% improvement in fuel economy. It seems like a lot of money to pay but at 60 for a tankful of unleaded.

Diesel engines can also benefit from remapping but I am more circumspect about that.
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