However . . . I have to say, that over the last week or so the old 1.8 K Series has felt much more responsive and willing so much so that the extra cost can be well justified. Needless to say I filled her again today with 'Super Plus.
Now, whilst I expect there to be some difference between the two, I keep asking myself whether the performance gain is largely 'just in me head'! I've not yet been able to calculate whether there has also been an improvement in mpg but I'm trying to monitor that now.
What do you use? Have you found the difference to be appreciable or am I being conned by my imagination?