But below 8C they provide far better grip than my summer tyres, I say summer I mean all year tyres.
You don't know this, as you've never compared them. It might well be true - I suspect the Polo has midrange tyres at best on as standard.
Fox I don't understand why you fail to beilve that winters tyres have no effect?
I don't beleive they have no effect at all, I think that people get the wrong end of the stick through either misinformation, hype or marketing. I completely accept that as temperatures fall a winter tyre will offer better grip than some summer tyres. But there are a HUGE range of summer tyres ranging from the absolutely garbage to the absolutely awesome. Do you honestly think that as soon as the temperature hits 6c the performance-gulf between the best and worst summer cars is suddenly nil, and that they all perform the same? Because this is what the pro winter tyre lobby imply - that there are only two tyres in the world, a summer tyre and a winter tyre.
I can absolutely appreciate why on a cold wet winters day a dedicated winter tyre might be a better bet than a typical eco-biased hard-compound summer tyre.
But as yet I have seen absolutely nothing to convince me that on a cold wet winters day where there is no snow and no ice that a winter tyre will offer superior water clearing abilitiy or superior dry grip to a typical UHP tyre (MIchelin Pilot Super Sport, Eagle F1 Assymetric 2, ContiSport Contact 5P).
Nobody EVER compares winter tyres against these high end UHP tyres. These are tyres normally praised for fantastic wet weather ability and in dedicated tests often come light years ahead of other summer tyres.
To then expect me to beleive that they are all the same below 7c and any winter tyre will be better is just too much, IMHO.
Especially as the closest thing I've seen yet to a proper test - Auto Express last year - showed the summer tyre as coming 2nd or 3rd overall once you remove the snow scores, and it wasn't even a performance tyre...
There are lots of facts and figures out there to show you which summer tyre is the best, which one brakes the best, etc etc. There are almost NO facts and figures out there for winter tyres except for the usual extreme examples of 'Look how much better this tyre is when its totally snowy' or 'Look, it stops quicker on sheet ice' and the odd graph which doesn't even name the summer tyre being tested...
Couple this with the fact that I have never once in any winter I have driven excluding snow thought 'Hmmm, I could do with a tad more grip..' and you can see where my opinion comes from.
I honestly suffered from a bigger lack of tyre confidence on my cars OEM fit Dunlop SP Sport 2000E in a September than I did on it's subsequent replacements (Eagle F1 GS-D3, then Assymetric 2, then ContiSport Contact). I was very unhappy with the performance they offered and replaced them despite them having good tread so I'm no stranger to changing a tyre that doesn't feel right.
And, excluding white stuff, the UHP tyres I've run since have never even come close to not feeling right. Some of this will be because its pretty mild down here - its above freezing most times I drive - but it's not as if I don't leave Plymouth, heck I drove to Edinburgh last year in December..
Go back 5 years and you will find almost no mention of winter tyres on typical car forums. It was on nobodys radar. Nobody asked about them. Nobody felt they needed them. Everyone was more than happy with the performance provided by a quality normal tyre. Then we have a few years of snow and everyone panic buys and attempts to justify this to themselves and everyone else by explaining it isnt about snow, its about summer tyres being terrible when it's 4c, it's drizzling and you are going Christmas Shopping at the Trafford Centre - ie, a normal British winter.
In this country, rain is the most common and most typical adverse weather condition we face therefore I ensure the tyres I choose are tailored at this, not the ever-so-often snow.
I'd just love to see some proper testing - I'd happily eat my words if somebody went to the Contidrome when it was 3c and did a proper test of all the UHP tyres and the winter tyres and said See? Look, its fact. You can't argue with that.
But nobody seems to bother despite falling over themselves do the same in the summer... odd.