Range Rover Evoque - garage has had it 4 weeks due to fault

Iceweasel

Good luck to the OP - I just hope he gets a petrol engined car,more suitable to his needs.

No-one know why the sensors have failed, but his low mileage should rule out a diesel as being his first choice.

RichardD1970 wrote: »

Go figure :cool:

Well I reckon that you can 'go figure' nothing from 2 very different examples.

If the conclusions one comes to was to based on a fleet of similar vehicles or the same vehicle using 2 different fuels over a reasonable period then the conclusion may be more valid.

Those who use 'premium' fuels do so for a reason that they are happy with- usually they are aware of a positive difference.

Those who use supermarket fuels are also happy - usually because they are unaware of any negative difference.

My experience was that supermarket fuel in my TD4 Freelander (with no DPF) gave a puff of smoke - visible only briefly in the mirror when accelerating hard - but more noticeable to a following vehicle. Morrisons fuel produced more smoke.

Shell V-Power /BP Ultimate / Total Excellium etc. diesel produced no visible smoke whatsoever.

Now in my current BMW 320d I use only premium diesels as not only is there no smoke but I get more mpg.

I have proven this to my own satisfaction a couple of times.

I travel to the eastern limit of the EU several times a year.

Leaving Aberdeen with a full tank of Tesco diesel I need to stop for fuel at Oxford ,no way will I go round the M25 with a low-fuel warning light on.

With a full tank of Shell V-Power I don't need to fill up until Calais.

There is little or no perceptible performance difference between supermarket and premium fuel that I am aware of from the driver's seat point of view.

As far as re-gens are concerned, when pottering about Aberdeenshire I am aware from the smell of hot exhaust and the ticking when the engine is switched off that a re-gen has recently happened.

Travelling across Germany and Austria I am aware of re-gens from the increase in coolant temperature on the additional digital temperature gauge I have installed.

It's possible that the car will choose to perform 2 re-gens in the same day at around 250 to 300 mile intervals.

The extra cost of the premium fuel seems to be returned in extra miles per tankful.

Whether it reduces the number of re-gens I don't know and whether it keeps the engine internals cleaner I also don't know.

But I see nothing negative with premium fuel apart from the extra cost.

As for the tanker queues that Marktheshark refers to, the thing that is unseen is the additive package that goes in is different - rather like the topping that goes on your ice-cream cornet - you choose strawberry or raspberry or no extra juice at all - or perhaps some sprinkles on top - but the basic ice-cream is the same and meets the same criteria for the cheaper cornet as for any more expensive cornet.

IamNotAllowedToUseMyName

My take on the variation of DPFs is driving style and engineering.

Some DPFs have just been retrofitted to an older engine design and so are inherently dirty, needing the DPF to capture the muck. Other engines have been designed afresh with a target of being clean, these engines will be kinder to the DPF.

Then there is driving style, which in part may be related to the power of the engine. The big German diesels don't get hammered in the same way as a little diesel Corsa. If you watch a pre-DPF diesel accelerate, typically you will see the soot coming out of the exhaust, over-revving and a heavy foot both contribute to dirt. So driving a diesel with a heavy foot will encourage soot to be produced. Drive with a light foot and in the right range of revs for the engine which is going to be between 1200 and 3000 revs for most diesels and you should avoid the engine generating too much soot in the first place to be filtered.

We drive short distances in our diesel for extended periods of time (it may go a few weeks doing lots of 5 mile journeys, then eventually it gets a treat) and have never had any sort of warning. Being an auto and not accelerating too hard, the engine is always going to be in a sensible rev range.

AdrianC

IanMSpencer wrote: »

Some DPFs have just been retrofitted to an older engine design and so are inherently dirty, needing the DPF to capture the muck. Other engines have been designed afresh with a target of being clean, these engines will be kinder to the DPF.

The Ford Duratorq/PSA DW12 in the Evoque has been around since 2000, but has always been DPF'd.

RichardD1970

Iceweasel wrote: »

Well I reckon that you can 'go figure' nothing from 2 very different examples.

If the conclusions one comes to was to based on a fleet of similar vehicles or the same vehicle using 2 different fuels over a reasonable period then the conclusion may be more valid.

Those who use 'premium' fuels do so for a reason that they are happy with- usually they are aware of a positive difference.

Those who use supermarket fuels are also happy - usually because they are unaware of any negative difference.

I drew no conclusions as these were just anecdotal examples and in themselves prove nothing, like the rest of the posts in these threads.

I have had no negative difference running on supermarket fuel. I did try running a few tankfuls of "Branded" fuel a couple of years ago after a similar discussion on here and noticed absolutely no difference in either MPG (tracked on Fulley) or performance. So yes, I am happy with my "cheap" stuff.

If you are happy paying a premium for a perceived benefit then fine, it's your car and your money

Iceweasel

RichardD1970 wrote: »

I drew no conclusions as these were just anecdotal examples and in themselves prove nothing, like the rest of the posts in these threads.

I have had no negative difference running on supermarket fuel. I did try running a few tankfuls of "Branded" fuel a couple of years ago after a similar discussion on here and noticed absolutely no difference in either MPG (tracked on Fulley) or performance. So yes, I am happy with my "cheap" stuff.

If you are happy paying a premium for a perceived benefit then fine, it's your car and your money

Perfect - we are in total agreement.

neilmcl

Iceweasel wrote: »

The extra cost of the premium fuel seems to be returned in extra miles per tankful.

...

But I see nothing negative with premium fuel apart from the extra cost.

I don't think it's enough to cover that extra cost though. I too have seen a slight improvement in mpg (and a noticeable improvement in performance) since switching from Sainsburys diesel to BP Ultimate diesel but at currently 10p extra per litre I don't think it's worth it.

I'll be going back to standard BP Diesel on the next fill-up to see what (if any) difference it makes.

bigjl

Johnmcl7 wrote: »

The local police and ambulance use the local Tescos for fuel as it's closest to where their vehicles are based. I guess they don't have a clue after all since no vehicle can run on supermarket fuel reliably...well apart from the millions of vehicles that have done for years and somehow escapes everyone's notice, well apart from your wife's car rather conveniently.

John

You even quoted what I said so making this simpler for the poor of understanding.

I said it contributes to vehicle reliability.

And going by the experiences of my chauffeur colleagues doing between them around 500k miles a year mostly round London using quality fuel helps.

One specific mate runs his entire fleet on Shell V Power fuel, 1 Jag XJL, 1 Viano, 1 730LD and 4 S400Ls.

Probably the most relevant discovery was with the Jaguar as it was bought from the first owner when he joined the Company and had previously needed the odd Regen run(Amber Light) when used round London all day since being fuelled exclusively with Shell V Power it has only needed the odd Regen run when one particular driver would leave it idling almost all day when on standby in K+C.

The reason for that is recent Jag diesels don't Regen unless above a certain constant speed to prevent the risk of fire, in my experience other diesels I have used will Regen on tickover. It may be the same for Land Rover and Range Rover diesels but I can't confirm or deny that.

A couple of questions for you though.

Do you live in the largest City in the UK?

Do yourlocal Police get the chance to get out of town?

And don't know where you live but I have worked in Secamb, GWAS, LAS, East of England and SCAS areas and only ever seen local crews filling up at BP

I did do some Intermediate tier work in Thetford back in '10 and the Private firm only ever used Tesco diesel, 2 of the Opels (rebadged Renault Master Ambulances had the engine management light on and the late shape Transit ('07 or '08 year, can't remember as it was on Eire plates) sounded like a bag of spammers on tickover and was gutless.

I will concede that older diesels prior to common rails fuel quality was much less important.

The old shape Transit drove fine but it had the old non tdci engine in it, 52 plate and over 300k miles and was ex West Midlands I think.

The tolerances are so minute on modern diesels that it just isn't worth the risk.

Especially if Tesco diesel is not actually any cheaper.

Why use an inferior product when it is the same price?

Would you buy Tesco teabags at the same price as Tetleys?

I wouldn't personally but you do what you like as all teabags are the same anyway aren't they?

I assume you also think that all engine oil is exactly the same?

No point worrying about A1, B1 or C1 or even C3 as they are all the same aren't they?

AdrianC

bigjl wrote: »

...but you do what you like as all teabags are the same anyway aren't they?

If all teabags in any given region of the UK were - bar an almost homeopathic amount of flavouring - filled from the same bulk containers, themselves filled down the same pipelines from the same tea-processing plant running just a handful of basic and very tightly regulated products, then you might have a decent analogy.