BP Ultimate surprising result.

Certainly foams on my XTrail, as it comes up the filler. I have to let it die down if I want to fill to the brim. It might depend on the filler design. I can't comment if any different with BP or Shell, as I always use supermarkets.

Tesco Diesel doesn't foam when I fill up my Tiguan!

Normally use supermarket - tried BP Ultimate for 6 months, towing & solo, noticed no difference - Octavia 2l. Previous Octavia had probs with Sainsburys diesel - when parked nose up for 48 hrs or more, wouldn't start. Garage said fuel filter blocked - more than 1 occasion.

most manufacturers test their vehicles using higher octane fuels and recommend it in their handbooks. its also better for keeping engine cleaner hense oil last longer, better startup and quicker heating up from cold start. the common rail diesels are much higher pressure injectors and the hotter fuel burn helps keep the injectors clean. all in all its better for the engine if slightly dearer even if you do not feel the difference.

Not sure about that.  When I bought my BMW (a few years ago admittedly) my dealer said that they had done extensive tests and that there was no difference between premium and normal fuel on performance of fuel consumption.

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well take a look at all the motoring mags and websites. honest john etc etc. also how many of you after towing or long trips let the engine tick over for 2 mins before turning of to let the turbo cool down as this is a major cause of engine failure in turbo vehicles.   

hitchglitch. who mentioned fuel consumption????

Fuel consumption is a related issue surely?

Yep, always let the engine idle to let the turbo cool but thanks for thinking to remind us all, LL.

Your turbo is likely to get a rest at the end of towing duties on the last few miles on the approach to a site & while manoeuvring your caravan onto its pitch .... unless of course you had the pedal to the metal all the way to your site