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  #71  
Old June 22nd 10, 11:17 PM posted to alt.autos.bmw
Dave Plowman (News)
external usenet poster
 
Posts: 1,533
Default Auto Wipers

In article >,
Scott Dorsey > wrote:
> If you look at the "Castrol Syntec" line, for instance, you will see
> that all of the different viscosities are actually totally different
> formulations. The 5W-40 meets the current BMW specs and is a "true
> synthetic" oil by European standards... the 5W-50 has a different base
> oil and could not be sold as a synthetic in Europe although it's
> considered a synthetic oil by the FTC here in America.


> Unfortunately something similar happens even with the low-cost GTX line
> of oils.... different service specifications at the different
> viscosities, and then they sell some other variants like "GTX High
> Mileage Oil" which in fact are almost completely unrelated and have a
> very different additive package to them.


It's often a problem where a maker uses the same name for many years. The
spec changes dramatically, and the older spec is often sold at the same
time as the latest. Mobil 1 is the same in the UK. Of course if you
understand the codes you can tell which is which. But perhaps it should
have a release date for that particular version on it.

--
*It is wrong to ever split an infinitive *

Dave Plowman London SW
To e-mail, change noise into sound.
Ads
  #73  
Old June 23rd 10, 01:31 PM posted to alt.autos.bmw
David Skelton[_2_]
external usenet poster
 
Posts: 47
Default Auto Wipers


>>>>Recirculated exhaust gasses containing crankcase oil vapours, over time clogging up
>>>>the
>>>>EGR valve and building up on the flaps.
>>>
>>> No..in a diesel, oil in the exhaust will be entirely made up of
>>> unburnt diesel not engine oil. Any tiny amounts of engine oil will be
>>> completely and massively irrelevant compared to the unburnt diesel oil
>>> quantities.

>>
>>No, you are wrong...
>>
>>Engine oil enters the combustion process from worn rings, worn valve stem oil seals,
>>the
>>PCV system, thrashing the engine from cold, and from damaged / worn turbo seals
>>especially in engines run on the incorrect oil spec.
>>This oil burns differently to diesel oil and leaves carbon deposits behind.

>
> I disagree. If a modern diesel has *so* much engine oil in it's
> exhaust so as to utterly overwhelm the effect of unburnt/burnt diesel
> oil in the exhaust


that is not what I said. I was reponding to the statement you made "in a diesel, oil in
the exhaust will be entirely made up of unburnt diesel not engine oil."
Do you think that when a car starts up and blue smoke comes from the tailpipe, that that
blue smoke is unburnt fuel ???

>then the engine is a wreck and worthless IMO. Who
> cares at that point if it munches the swirl flaps. I've never owned a
> diesel that burned *any* measurable amounts of engine oil. Burning
> diesel oil produces carbon deposits..often called soot.


No, the soot (or particulate matter) is unburnt fuel. Hopefully, none should get past the
DPF.

> It can
> regularly be seen in your part of the world, apparently.


Unburnt fuel from petrol cars too can be seen coming out from the tail pipe.

>>> I would be prepared to believe someone who told me my fan never
>>>operated to cool the engine.
>>>It never did on previous non-aircon cars I owned

>>
>>I bet it did

>
> If a non A/C engine is sufficiently cooled by the airflow through the
> radiator, why would the fan ever start?


The possibility of a restricted cooling system, or stuck in heavy traffic in higher
ambient temperatures, which I'm sure you must get one or two hot days a year up there.


>>>- even in the traffic
>>>I have to deal with.

>>
>>More people live in the Home Counties than in the whole of Scotland.
>>I would find it hard to believe the traffic could be worse where you are.

>
> I think you're logic is reversed now. I'd expect more fan running in
> heavy slow moving traffic down south than in faster moving sparse
> traffic up north.
>
>>I never use A/C.
>>I have breathing difficulties that are made worse by cooled dry air, and it wastes
>>fuel.

>
> Mentioning the fuel wasted by A/C while owning a 335d *is* a tad
> bizarre.


We get an average MPG of 39.4, which is better than our 330d, and nearly as good as our
320d s, and much, much better than the Ford Focus. That is not computer mpg, but
calculated from miles driven divided by gallons used.

>>> There's far too much smoke and mirrors in that debate. I treat fuel as
>>> fuel

>>
>>It is certainly not

>
> How so? That debate centres on the additive differences. Many have
> opinions on this but very few seem to actually know.
>


The research I have done points to different makes of fuel performing differently. I will
not *give* away info that I have been paid to ascertain.

>>>I've not been convinced by the cheap/expensive fuel
>>> debate - particularly for diesel.

>>
>>You will if you continue to use supermarket fuel extensively.

>
> I don't believe so. It didn't happen in the past so, unless something
> like the Nikasil problem is lurking in my engine, I don't expect any
> problems now. It's certainly not something I worry about in a diesel.


You should do.
The direct injection Piezo injectors in your BMW engine are more susceptible to fouling
from poor quality fuel than the injectors of 10 years ago. I have written before that
during manufacture, the Piezo injectors are flow tested by the manufacturer to enable
them to have a "correction factor" that needs to be programmed into the ECU of the
receiving car, for that particular cylinder, to accurately inject the precise quantities
required per injection, up to 5 per cylinder per 4 stroke cycle.
Thus, the cleanliness of your diesel injectors is more critical than those in most petrol
cars.

>
>>There are still plenty of carb cars down here.

>
> Do you live in a car museum?


No, the cost of living is higher, meaning people have less disposable income. There are
also more OAPs whom cannot afford newer cars.


>>> Don't they recover energy from the alternator on some models when
>>> braking?

>>
>>Recover energy from the alternator ??

>
> I'm sure I saw that in BMW literature somewhere..that's all I meant.
>
>>Brake Energy Regeneration: ( this is driving a motor in reverse bias as a generator)
>>not
>>what BMWs do.

>
> <snip>
>
>>The different models have different variations fitted to the cars. Our (August) 2009
>>335d
>>only has one of these functions. That is the "Brake Energy Regeneration", nothing else.

>
> So how do BMW do it?


Do what ?
If you are asking about the battery charging, I've already written about it.

>>> Actually I haven't thought of VW as reliable for over 10 years now.

>>
>>When I used work for VAG (early nineties), I found that they were just the same as
>>other
>>makes.

>
> That sounds about right..over 10 years ago.


Again, I was agreeing with you.


>>>It's just that owning a BMW, I do genuinely get the feeling that someone at BMW cares
>>> just a little more than the equivalent person at other German car
>>> manufacturers.

>>
>>I do not get that feeling. When improvements that could be made are suggested, one is
>>brushed aside.

>
> I'm not surprised! That's not a unique BMW failing.
>
>>In general, someone whom buys a cheaper car does not give it their best care, more
>>exotic
>>machinery needs better care.

>
> You'll need to explain that one..are more exotic cars poorer built,
> unable to cope with the rigours of moving from a to b without tlc?


Would you take a Lambo to a XXX (substitute for your least fav. manufacturer) dealer for
servicing / repair. More exotic machinery needs specialist care.

>
>>You are the one whom said "junk like that".

>
> I have the advantage of knowledge as opposed to guesswork.


I have owned Fiats, albeit a while ago. What am I guessing ??


> An independent assessment of that Fiat was provided by a car thief who
> stole it (it was never locked). It was driven 200 yards then the thief
> abandoned it and walked in preference and he even left a note of his
> opinions of the car!! The car *was* junk. I also think that Fiats from
> last century tended to turn to junk as they headed much above 50,000
> miles anyway.


Depending on the care from the owner / user.

>
>>>>The Fiats I have had had failed electronic parts and gearboxes, and rust too.
>>>
>>> Not recently though?

>>
>>No

>
> Your experience of Fiats is not really that relevant any more as the
> newer ones are quite different animals to the old rusters of last
> century. They may, or may not be, the best but they are markedly
> better than the Fiats of the last century.


Yes, probably, but I did not say Fiats were junk.

>
> --
> Z


Regards

David Skelton



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  #74  
Old June 23rd 10, 01:33 PM posted to alt.autos.bmw
David Skelton[_2_]
external usenet poster
 
Posts: 47
Default Auto Wipers


> That poor quality reply to a very reasonable question damages your
> credibility. Why is Castrol not good? There must be a reason..
>
> --
> Z


I lost all credibility 25 years ago when I learnt to speak.

regards

David Skelton



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  #75  
Old June 28th 10, 11:49 AM posted to alt.autos.bmw
Zathras
external usenet poster
 
Posts: 742
Default Auto Wipers

On Wed, 23 Jun 2010 13:31:42 +0100, "David Skelton"
> wrote:

>
>>>>>Recirculated exhaust gasses containing crankcase oil vapours, over time clogging up
>>>>>the
>>>>>EGR valve and building up on the flaps.
>>>>
>>>> No..in a diesel, oil in the exhaust will be entirely made up of
>>>> unburnt diesel not engine oil. Any tiny amounts of engine oil will be
>>>> completely and massively irrelevant compared to the unburnt diesel oil
>>>> quantities.
>>>
>>>No, you are wrong...
>>>
>>>Engine oil enters the combustion process from worn rings, worn valve stem oil seals,
>>>the
>>>PCV system, thrashing the engine from cold, and from damaged / worn turbo seals
>>>especially in engines run on the incorrect oil spec.
>>>This oil burns differently to diesel oil and leaves carbon deposits behind.

>>
>> I disagree. If a modern diesel has *so* much engine oil in it's
>> exhaust so as to utterly overwhelm the effect of unburnt/burnt diesel
>> oil in the exhaust

>
>that is not what I said. I was reponding to the statement you made "in a diesel, oil in
>the exhaust will be entirely made up of unburnt diesel not engine oil."


It is in effect 'entirely' as the portion of engine oil artifacts is
negligible in this case (swirl flap failure). I'm an engineer not a
pedant.

>Do you think that when a car starts up and blue smoke comes from the tailpipe, that that
>blue smoke is unburnt fuel ???


Unburnt (in varying degrees) diesel can produce all sorts of colours
of smoke. I've seen white, blue, brown, black...and variations in
between.

I might be very slow on the uptake here but I'm starting to piece
together comments which suggest, to me, that your expertise/experience
is more in petrol engines than diesel ones? Some of your comments
while very true of petrol engines are not quite so true of diesels,
IMHO.

>>then the engine is a wreck and worthless IMO. Who
>> cares at that point if it munches the swirl flaps. I've never owned a
>> diesel that burned *any* measurable amounts of engine oil. Burning
>> diesel oil produces carbon deposits..often called soot.

>
>No, the soot (or particulate matter) is unburnt fuel. Hopefully, none should get past the
>DPF.


Yawn. 'Burning' diesel in a car produces soot because it doesn't all
actually *burn* - yes, I do know that. If I were to have to (as it
would seem) explain precisely how a 4 stroke deals with it's fuel in
every sentence or use shorter more commonly used simplifying words
like 'burned' then this conversation would be a lot more tedious than
it already is.

Nevertheless, the soot in diesel exhaust *will* be available to build
up on the swirl flaps to a vastly greater degree than any engine oil
artifacts..no?

>> Mentioning the fuel wasted by A/C while owning a 335d *is* a tad
>> bizarre.

>
>We get an average MPG of 39.4, which is better than our 330d, and nearly as good as our
>320d s, and much, much better than the Ford Focus. That is not computer mpg, but
>calculated from miles driven divided by gallons used.


Why didn't you get much better mpg from the 320d - it's got much
better figures than the 335d. Was it faulty, poorly driven or badly
maintained?

>The research I have done points to different makes of fuel performing differently. I will
>not *give* away info that I have been paid to ascertain.


LOL..a 5th Gear episode (repeated in the last two weeks on Quest)
showed that..there's no need to be precious.

>>>>I've not been convinced by the cheap/expensive fuel
>>>> debate - particularly for diesel.
>>>
>>>You will if you continue to use supermarket fuel extensively.

>>
>> I don't believe so. It didn't happen in the past so, unless something
>> like the Nikasil problem is lurking in my engine, I don't expect any
>> problems now. It's certainly not something I worry about in a diesel.

>
>You should do.


Forgive me if I don't.

When/if the injectors fail (as they are likely to do in most
installations given time) I'll just replace them. Big deal. Worrying
about stuff like that carries too high a mental cost.

>The direct injection Piezo injectors in your BMW engine are more susceptible to fouling
>from poor quality fuel than the injectors of 10 years ago.


That's not unexpected..the nozzles are getting smaller and delivering
smaller amounts of fuel.

>I have written before that
>during manufacture, the Piezo injectors are flow tested by the manufacturer to enable
>them to have a "correction factor" that needs to be programmed into the ECU of the
>receiving car, for that particular cylinder, to accurately inject the precise quantities
>required per injection, up to 5 per cylinder per 4 stroke cycle.
>Thus, the cleanliness of your diesel injectors is more critical than those in most petrol
>cars.


I expect it'll become similar for petrol engines as they move more to
smaller capacity, direct injection and boosted air.

>No, the cost of living is higher, meaning people have less disposable income. There are
>also more OAPs whom cannot afford newer cars.


LOL.

>>>The different models have different variations fitted to the cars. Our (August) 2009
>>>335d
>>>only has one of these functions. That is the "Brake Energy Regeneration", nothing else.

>>
>> So how do BMW do it?

>
>Do what ?


Doh. "Brake Energy Regeneration" - as suggested in the last statement
you made prior to my question.

--
Z
  #76  
Old June 29th 10, 12:04 AM posted to alt.autos.bmw
David Skelton[_2_]
external usenet poster
 
Posts: 47
Default Auto Wipers

>>>>>>Recirculated exhaust gasses containing crankcase oil vapours, over time clogging up
>>>>>>the
>>>>>>EGR valve and building up on the flaps.
>>>>>
>>>>> No..in a diesel, oil in the exhaust will be entirely made up of
>>>>> unburnt diesel not engine oil. Any tiny amounts of engine oil will be
>>>>> completely and massively irrelevant compared to the unburnt diesel oil
>>>>> quantities.
>>>>
>>>>No, you are wrong...
>>>>
>>>>Engine oil enters the combustion process from worn rings, worn valve stem oil seals,
>>>>the
>>>>PCV system, thrashing the engine from cold, and from damaged / worn turbo seals
>>>>especially in engines run on the incorrect oil spec.
>>>>This oil burns differently to diesel oil and leaves carbon deposits behind.
>>>
>>> I disagree. If a modern diesel has *so* much engine oil in it's
>>> exhaust so as to utterly overwhelm the effect of unburnt/burnt diesel
>>> oil in the exhaust

>>
>>that is not what I said. I was reponding to the statement you made "in a diesel, oil in
>>the exhaust will be entirely made up of unburnt diesel not engine oil."

>
> It is in effect 'entirely' as the portion of engine oil artifacts is
> negligible in this case (swirl flap failure). I'm an engineer not a
> pedant.


It is not negligible in a worn engine as some of those were.
Those engines had covered tens of thousands of miles, they were not new engines. Over
time, the oil vapours had collected on the high turbulence areas whose parts were cooler
during the over run.
I am pedantic, I've already said so, but you did not believe me. I doubt you are an
engineer from an automotive background.


>>Do you think that when a car starts up and blue smoke comes from the tailpipe, that
>>that
>>blue smoke is unburnt fuel ???

>
> Unburnt (in varying degrees) diesel can produce all sorts of colours
> of smoke. I've seen white, blue, brown, black...and variations in
> between.


Blue smoke is engine oil burning, brown / grey / black smoke is unburnt fuel (petrol or
diesel). White is usually steam, sometimes auto transmission fluid, sometimes coolant
from a blown head gasket, or cracked cylinder head.


> I might be very slow on the uptake here but I'm starting to piece
> together comments which suggest, to me, that your expertise/experience
> is more in petrol engines than diesel ones? Some of your comments
> while very true of petrol engines are not quite so true of diesels,
> IMHO.


Worthless

>
>>>then the engine is a wreck and worthless IMO. Who
>>> cares at that point if it munches the swirl flaps. I've never owned a
>>> diesel that burned *any* measurable amounts of engine oil. Burning
>>> diesel oil produces carbon deposits..often called soot.

>>
>>No, the soot (or particulate matter) is unburnt fuel. Hopefully, none should get past
>>the
>>DPF.

>
> Yawn. 'Burning' diesel in a car produces soot because it doesn't all
> actually *burn* - yes, I do know that.


That is *not* what you wrote before.

>If I were to have to (as it would seem) explain precisely how a 4 stroke deals with
>it's fuel in
> every sentence


YOU do not need to explain to me. It is you whose knowledge is superficial.

> or use shorter more commonly used simplifying words
> like 'burned' then this conversation would be a lot more tedious than
> it already is.


You made it tedious. You think you know more than you do.

> Nevertheless, the soot in diesel exhaust *will* be available to build
> up on the swirl flaps to a vastly greater degree than any engine oil
> artifacts..no?


Yes and no. It depends on how the car is driven, and the trips involved. There is no set
answer as there is no set driving pattern.

>
>>> Mentioning the fuel wasted by A/C while owning a 335d *is* a tad
>>> bizarre.

>>
>>We get an average MPG of 39.4, which is better than our 330d, and nearly as good as our
>>320d s, and much, much better than the Ford Focus. That is not computer mpg, but
>>calculated from miles driven divided by gallons used.

>
> Why didn't you get much better mpg from the 320d - it's got much
> better figures than the 335d.


You see ? Again, no actual knowledge of facts.


>Was it faulty, poorly driven or badly
> maintained?


None of the above. The Govt. figures are not achievable as they are determined in a lab,
and this car is driven differently than those before. It only does longer trips. The
others did not.


>>The research I have done points to different makes of fuel performing differently. I
>>will
>>not *give* away info that I have been paid to ascertain.

>
> LOL..a 5th Gear episode (repeated in the last two weeks on Quest)
> showed that..there's no need to be precious.


I have not seen the show. What did they say ?


>>>>>I've not been convinced by the cheap/expensive fuel
>>>>> debate - particularly for diesel.
>>>>
>>>>You will if you continue to use supermarket fuel extensively.
>>>
>>> I don't believe so. It didn't happen in the past so, unless something
>>> like the Nikasil problem is lurking in my engine, I don't expect any
>>> problems now. It's certainly not something I worry about in a diesel.

>>
>>You should do.

>
> Forgive me if I don't.
>
> When/if the injectors fail (as they are likely to do in most
> installations given time) I'll just replace them. Big deal. Worrying
> about stuff like that carries too high a mental cost.


I doubt that you even care if one of the next owners of your car have to find the cost of
repairing something caused by your ignorance and superiority complex.


>>The direct injection Piezo injectors in your BMW engine are more susceptible to fouling
>>from poor quality fuel than the injectors of 10 years ago.

>
> That's not unexpected..the nozzles are getting smaller and delivering
> smaller amounts of fuel.


So fuel quality and additive technology is more important than before.

>
>>I have written before that
>>during manufacture, the Piezo injectors are flow tested by the manufacturer to enable
>>them to have a "correction factor" that needs to be programmed into the ECU of the
>>receiving car, for that particular cylinder, to accurately inject the precise
>>quantities
>>required per injection, up to 5 per cylinder per 4 stroke cycle.
>>Thus, the cleanliness of your diesel injectors is more critical than those in most
>>petrol
>>cars.

>
> I expect it'll become similar for petrol engines as they move more to
> smaller capacity, direct injection and boosted air.
>
>>No, the cost of living is higher, meaning people have less disposable income. There are
>>also more OAPs whom cannot afford newer cars.

>
> LOL.



Why ?? A town not far from where I live has an OAP population of 33%. What is funny
about that ?


>>>>The different models have different variations fitted to the cars. Our (August) 2009
>>>>335d
>>>>only has one of these functions. That is the "Brake Energy Regeneration", nothing
>>>>else.
>>>
>>> So how do BMW do it?

>>
>>Do what ?

>
> Doh. "Brake Energy Regeneration" - as suggested in the last statement
> you made prior to my question.


I have already explained. I wrote that before, too.
Obviously, reading comprehension is not your strong suit.


David Skelton



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