Loss of power then fine? ?

[Robbie8666]

I realise now that morrisons (where I usually fill up) use black pipes for both diesel & petrol with only the cap round the nozzle green or black as opposed to other petrol stations using green & Black pipes!
I am definitely more alert when filling up now though!!
I've filled up with premium unleaded this tank full see if that makes a difference & clean it out a bit!!
riding up to Nottingham this evening so will see if it makes a difference!!