Jaguar XF - Diesel Additive - Dennis Dorking

Honest John advises that short trips are bad for diesels.

At work we use " Platinum Plus" as an additive in our delivery van to lower the temperature required to burn off the soot.

Should I use this product or similar in the used XF 3 Litre diesel that I plan to buy soon.

I will be doing lots of short trips with at least a monthly "fast" 150 mile round trip.

Your advice would be appreciated.

Dennis

Jaguar XF - Diesel Additive - Duncan112

I've just looked at the website for this additive and it looks to have been written by the same people that write the literature for the purveyors of magnets to fit to fuel systems and water pipes, whilst there are no untruths in the statements there is little evidence that your performance will be radically improved.

I am particularly puzzled by the advantages of a lower combustion temperature as one of the limiting factors for the thermal efficiency of a gas cycle is to maximise (within material limits) the upper temperature of the cycle.

My advice would be to save your money and buy a good quality fuel (Shell or Shell V power both produce excellent results in my diesel) and take the car for a good (20 mile) motorway run at least once a week.

It's a lovely car though, my partners brother has oneand only faults it on its snow performance.

Jaguar XF - Diesel Additive - Armitage Shanks {p}

Millers diesel plus improves the quality of normal to diesel to that of premiun diesel (allegedly) but at a lower cost per litre that the price difference at the pump. Millers costs 2.4 p per litre of fuel treated.

What is this doing in Legal BTW?

Edited by Armitage Shanks {p} on 03/10/2012 at 22:06

Jaguar XF - Diesel Additive - unthrottled

I am particularly puzzled by the advantages of a lower combustion temperature as one of the limiting factors for the thermal efficiency of a gas cycle is to maximise (within material limits) the upper temperature of the cycle.

The combustion temperature refers to the DPF soot burn off temperature, not the cylinder temperatures.

Platimum is far too expensive to use as a total loss catalyst. Besides you've got a perfectly good platinum lined oxidation catalyst to the catalytic role. There might be some ceria based compound in this snake oil, but not enough to be much more than a homeopathic dose.

You don't need any of this junk.

Edited by unthrottled on 04/10/2012 at 00:29

Jaguar XF - Diesel Additive - Avant

Moved to general motoring section.

Jaguar XF - Diesel Additive - Duncan112

Thanks Unthrottled, I suspected that was the intention of the product however if you read the puffery on the web site..

The uniform distribution of the catalyst within the fuel allows for a faster burn at a lower temperature. Platinum Plus catalysts are fully fuel-soluble, rather than suspensions. In this way, using Platinum Plus avoids the potential for inconsistent combustion from non-uniform catalyst dispersion, storage instabilities or mechanical wear or injector clogging effects.

It appears to be implying that the lower temperature occurs during the cylinder combustion cycle, as I suggest in my original post there are no outright untruths in the statements, merely a collection of spuriously connected facts that have little bearing on the ultimate combustion process efficiency.

Having spent some years working in energy efficiency I have come across a large number of products that claim to improve combustion efficiency, descale water pipes etc, whilst most of these are sheer bunkum I noticed that what does happen is that people fit these devices or use these additives and notice an "improvement", the improvement is almost always due to improved record keeping to find if the device works or not. This is one reason I support the roll out of water metering and smart utility metering as "If you can't measure it you can't save it"

Jaguar XF - Diesel Additive - unthrottled

Never underestimate the power of wanting something to work to give improved results.

I strongly suspect this is the case with 'premium' petrol. Subconsciously, you drive a little more diligently to tease a few more miles per tank and thus 'prove' that the extra cost was worthwhile. I do enjoy reading the pseudo science on the packaging though!

The ability of the aftermarket to solve problems that don't exist is boundless. "You need a bigger exhaust on your engine, guvnor. The back pressure is hampering performance. I've got a shiny piece of drainpipe that'll realise its full potential etc." Apparently, the same thing applies to the factory air filter. Of course they've developed a sports performance filter that has hitherto eluded professional engine designers at the OEMs.

Of course all these products are cheap to make and install and are sold at huge profit margins to th gullible.

Jaguar XF - Diesel Additive - skidpan

Apparently, the same thing applies to the factory air filter. Of course they've developed a sports performance filter that has hitherto eluded professional engine designers at the OEMs.

I am probably the biggest sceptic in the world when it comes to a man in a shed being able to develop better products than the manufacturer, if they were that good the manufacturer would employ them and sack the R & D department but some years ago I fitted a K & N filter to my Golf. No idea if it performed any better but it saved me a fortune, used it for over 100,000 miles, just washed it and oiled it every 10,000 miles. Way cheaper than a new paper filter every 20,000 miles.

Jaguar XF - Diesel Additive - Hamsafar

It's probably just urea, same as Adblue. It probably works. I think Platinum is just the name, not the catalytic agent.

Jaguar XF - Diesel Additive - Collos25

All addatives are waste of money whether they are added to petrol or engine they work on the brain not on the car and also relieve you of hard earned luca.

Jaguar XF - Diesel Additive - unthrottled

It's probably just urea, same as Adblue.

No! People get very confused by this. Urea is used as a REDUCING agent for reducing NOx to Nitrogen. Not what you want when you're trying to OXIDISE soot!

Eolys is not urea either.

Jaguar XF - Diesel Additive - blindspot

ive gone back to petrol engines now. have been using bardahl e 10 fuel improver and yer fuel mpg improved by 9% as told it would . if i was stuck with a modern diesel then i would try bardahl addetive to burn burn off the soot at lower temperature.

might suggest manufactures dont recomend this ,as it would suggest they have aproblem. . could say any oil is an addetive

Jaguar XF - Diesel Additive - Collos25

No problem with modern motor oils the problem the oil companies have is with rocking horse s*** salesman.Have you ever heard such rubbish as "burn of soot a lower temperatures".

Jaguar XF - Diesel Additive - blindspot

No problem with modern motor oils the problem the oil companies have is with rocking horse s*** salesman.Have you ever heard such rubbish as "burn of soot a lower temperatures".

Jaguar XF - Diesel Additive - blindspot

the only way we will really know and that would take a proving ground to trail two cars ,one with and one without. perhaps they already have and not told us