Update on this. I know it's only been a day but the results are interesting.
I'm not sure if it's placebo or my careful driving, since I'm a little unsure of everything, but it runs smoother than it did on Vpower 😂
It used to be very jerky in second gear at low RPMs, but now it's not...
I bought a K11 (2002) not too long ago and I realised I might not be able to run it on E10 when I went to fill it up the first time. I've been running on Shell Vpower till now, but it's getting quite expensive. I want to try E10 and see how it goes. I'm only gonna put a £10 in it. Fingers...