Might have been covered elsewhere but just in case. I read a piece in The Times today about standard petrol in the UK getting watered down (obviously not with water…) from September this year. What the article said was that cars over 10 years old might suffer (sorry have binned the paper so ‘suffer’ will have to do for now!!) and you’ll have to use premium petrol. I’ve always used cooking petrol in both my old (seventies) twin shocks and modern bikes. Is it OK just to switch to the higher g