So the diagnostics showed nothing was wrong but since your seat of the pants dynamometer thought it felt better with branded fuel its a conclusive result.

What you need is a blind test driving the same car using different fuels. The result would be very interesting.

Clogging Diesel filters very common now, partly due to the high filter content. Puegeot/Citreon recently suffered with filters clogging in as little as 1800 miles on their 1.6 psa range of engines and changed the spec from 60 microns to 40 microns !

I wont use supermarket diesel and yes there is a difference ( I dont care what any one says about what it conforms too ) & when my wife used to fill hers up with supermarket fuel the MPG dropped everytime and so did the performance.

The quality of the addatives in the non supermarket fuels are superior andf modern engines requires these to keep running at their best.

Just found this on a Kia forum with the response from Kia. Basically sums up what i thought !

We’re sorry to hear that you’ve experienced fuel filter problems with your Sportages.

Our investigation into this is on-going, so far we have yet to find a fault on any our products and we have found the concern is isolated to two geographical areas.

We are not, and have not, stated that supermarket fuel is to blame for this problem. However the better the quality fuels are less susceptible to ‘waxing’ in very low temperatures.

Please be assured that we will continue to work on a long term solution for this concern and will update customers once it is available.

Thanks again for posting.

Kia Customer Service

0845 6017521

Visit www.kia.co.uk

Join In www.facebook.com/kiamotorsuk

Enjoy www.youtube.com/kiamotorsuk

Edited by injection doc on 17/12/2014 at 20:27

Just found this on a Kia forum with the response from Kia. Basically sums up what i thought !

That is quite an old response from Kia. Kia backed down from blaming "low quality fuel" when owners asked Kia to confirm in writing that the fuel was at fault so that they could take action against the retailers.

When this was happening owners using Shell and other so called "quality" fuels were also having problems in the small geographic area affected.

I will continue to use supermarkety fuels since like all sensible people I fully understand that the only difference is the snake oil additives that may or may not work.

Good for you, so don't critcise other people's choices of fuel or additives unless you have any concrete evidence to prove it. Its not your money they're spending.

Simply pointing out the facts and giving people an opposite truthful view to that expressed by people who claim that supermarket fules are rubbish.

Is it worth posting the 5th Gear Redex dyno tests video? With you and your opinion I doubt it

If the fuel test was as well devised as the tyre test I saw on 5th gear recently it will not be worth watching. For those who did not see it they tested 3 types of tyre, the OEM Conti eco tyres, brand new budget and used with 3mm tread. The Conti's and 2nd hand were obviously well scrubbed giving them an instant advantage so not a fair test for starters. Then they tested them for wet braking, the Conti's were poor as expected and finished last but the brand new unscrubbed budget finished only 2nd probably because they still had the release compound on the surface. If they had been driven for a few hundred miles I suspect the result would have been different.

I had a pair of Kleber tyres on the front of a 1982 Vauxhall Cavalier I once owned. They never wore out. Trouble was I couldn't go around roundabouts in the wet either so I eventually changed them for Michelins.

We have Kleber Quadraxers on 3 of our cars, superb tyres. Made by Michelin. Avant uses them as well.

If you could not get around roundabouts in the wet there was one simple problem, you were going way to fast.

Oh god, someone please shoot me.

post your sddress and when you are there... ...

Buckingham Palace, London SW1. If I'm not in I'll be walking the corgis.

Yes Your Majesty..

I fill up at Asda [diseasel]...now, whenever the opportunity arrises. Largely due to Asda's overall pricing policy [I don't 'shop' there]..

I achieve consistently, the same fuel consumption as obtained if I happen to fill with Shell, BeePee, Jet, etc.

Even obtained a consistent fuel consumption having inadvertently added 20-odd litres of U/L petrol!

It never fails to start, has never yet ceased functioning unintentionally, performs on the road surprisingly well for its shape, or regardless of what I appear to shove in the tank..[including a litre of white spirit a helpful friend had poured into a spare fuel can]...and will probably top up with the sundry, unwanted Christmas sprirts folk insist on thinking I need.

[More useful than pouring it down the sink?}

I change the filter annually, whether it needs it or not....and the tyres seem to be everlasting, since I am too tight of wallet to want to change them while there's still some life left. I don't concern myself about roadholding [or, lack of]..for that is subjective....what I can drive quickly & safely, others may well crash 'n burn...it's about what one is used to.

The car? An ancient [20 years old] Dai-hatsu Fourtrak...with the no-nonsense, no-gizmos 2.8 ltr. 4-pot turbo diesel engine...exactly what a proper small diesel should be.

No wiring, no silly sensors, no plugs and sockets, no fanciful ECUs, and probably poisons my grandkids every morning....

I would add, it's been driven from one end of the country to the other many times...sometimes towing trailers.....and it has a giant-killingly enormous 3.5 tonne weight towing ability...according to the factory. Given the sheer enormousness of the brakes, that cannot be denied.

b***** awful headlights, however...so maybe keeping the Forth Bridge bull bars on the front might be a good idea? :)

Edited by alastairq on 21/12/2014 at 18:12