Lupo 1.0 EGR

It sounds like a bit of crap in the valve. Get them to use good quality fuel rather than supermarket stuff.

I know this has been done before but is supermarket fuel straight out of the drip tray then? Where's 'good' fuel available?

Si

Supermarket fuel CAN be poorer quality than named brands usually are. many cars used to pink on supermarket fuel of nominally the same octane (pre knock retarding computers in all modern stuff)

Many peopke can notice better running on branded fuel.

Strip downs of engines run on the super petrols are shown to be cleaner internally.

I notice more faults like head gasket failure, valve burn, egr valve blockage, throttle body build up on vehicles that use supermarket fuel all the time.

I would only use supermarket stuff in an emergency in my own vehicles.

shell, bp, esso (who charge the same as supermarkets if one is within 3 miles) all seem good. I like to use bp ultimate.

Try good stuff for a few tankfulls and see what you think is the best bet, check mpg before and after, you may not find that good stuff is really much dearer overall.

IANAM (I am not a mechanic etc)

Since supermarket petrol conforms to the RON specs for petrol, shouldn't the manufacturer of the engine be blamed for it not being unable to run on petrol of the correct grade ?

the engines all CAN run on it, just whether they run well and cleanly.

humans CAN live on absolute junk food, but will deteriorate over time and not perform as well as they would on good food, same goes for cars.

It's not so much the fuel as that all has to conform to the necessary European standards but rather the additive packs that the supermarkets put in. Given that the car the OP is talking about usually does short journeys a better quality fuel (Shell, BP, Esso etc) would probably do a better job of keeping the engine clean. If you're doing long trips and draining the tank quickly then supermarket fuel is probably just as good.

I've found that our A4 1.9 TDI 130 runs better on Shell diesel than any other.

Funny you should say that i noticed that my relay van always seemed to run better on shell desiel

Carry on kidding yourselves - suckers!

well the average fuel consumption logged by the vans computer shows an increase of 2mpg when i use branded fuel as apposed to supermarket fuel over the same journey with the same load and weight distribution over a

Some "good fuel" is hardly available anywhere. Garages tend to stock only the normal and plus levels. Super plus is vanishingly rare because, I am told, "customers won't pay for it". How short sighted.

What's the point in paying an extra 25-30p per gallon (yes, in real terms) for no discernable benefit? Depends on your engine maybe, but super plus made not the blindest bit of difference to performance nor mpg in my car.

It would, if you had a vehicle that would adapt to it, usually this is only the more expensive end of quite modern vehicles, there is no point in putting in superplus if your ignition is mapped only for regular, however good quality regular may well help over cheapest possible regular.

Mrcheerful

There is a fuel depot near us where fuel is stored in tanks, according to grade but not according to which retailer it is destined to supply. The Esso tankers roll up and fill, the Shell tankers roll up and fill, the Tesco tankers roll up and.......................... I'm sure you get the picture.

Can you recall the pictures when we had the fuel blockade, with the multitude of different tankers all emerging from the same depots? Well that's the reality of the situation.

The moon isn't really made of green cheese either.

Why am I a sucker?

My car runs more smoothly on Shell fuel. I can tell when my wife has filled up with supermarket fuel without seeing the receipt.

And the real clincher for me is that supermarket fuel is no cheaper than branded fuel so why should I bother giving Tesco, Sainsbury's etc my money for an inferior product???

You are correct. However the additive packages are put in by the delivery driver at the point of delivery. So not all fuel is the same.

No way!

Dave ("Dave" ) gurgled happily, sounding much like they were saying:

Big fan of homeopathy, are you?

Yep, I've not seen any 'quantifiable' noticeable differences in the Audi

WTF!

If you want to go down that road then I have seen results with homeopathy where conventional medicine failed so yes I guess I am a believer.

How on earth does a delivery driver mix a small quantity of additive in a bloody great tank of fuel and ensure it is properly mixed. It does have to be a small quantity since he has to hump it onto the top of the tank! Besides I've seen lots of deliveries of fuel with no "extras" being added.

I think some of you lot must be employed by the same people who tried to persuade us years ago that their fuel was better because it was a different COLOUR. Yes they really did!!!

Elvis lives. I saw him in the chipshop.