I am also quite interested in what lubricant other cubers in the UK use. I currently use PuzzleProz lubricant, which coincidentally I just ran out of my last syringe yesterday! But, the problem with PuzzleProz lubricant is that it only lasts for about five minutes, almost literally. The kind of speed I want in my cube will only last for a few minutes until it starts to feel sticky, with continued use. Then, eventually it starts to make a sticky noise as if it is being unstuck from itself. Overnight it goes back to normal and then when you come to re-lube it the build up of lubricant makes it worse and it needs a clean out.
I do however have some 'pure*' (in a different respect) silicone in my store bought. Not long ago we had some plumbers at the house and overnight they left a bottle of silicone lubricant for fitting pipes, I grabbed it and lubed my store bought. Unfortunately at that point I had lubed my main speed cubes with PuzzleProz lubricant so had to pass the DIYs up. I also can't remember the brand, though it was industrial and for 'the trade'. At the moment my Rubik's 3x3 is relatively fast although could do with more lubricant so it's a shame it doesn't get used, hopefully I can get down to Halfords or some other place to get some more! I don't really favour living in the North, although we get the competitions here we don't get the lube!
*clear, not creamy like PuzzleProz.
Thinking about silicone, I find it amusing that the British people on this forum know and talk about CRC and Jig-a-Loo yet have just about no access to it. The when we have our own thread about it we're like "Wow, that lube might be good".
It's a pity we don't have one standard lube available to us all, like CRC.
