I've tried tesco, and it just didnt seem right! normally use bp, but have to say optimax seems to do the trick - i'm only using it because its got cleaning stuff in it - but something is definately better!
Mine fell off years ago!
Its full of holes, - just like the heat / puddle theory is!
It basicly means you are less likely to ignite anything if you for example park on long dry grass
So if i suspect some (serious ? ) overfuelling would a bpv be good to sort that and improve economy?
I know i dont want it to run lean but running rich cant be good!
33 mpg has gotta be wrong!