Correct Grade of Petrol

[Reckless Rat]

This is purely a personal view, but over the last 40 years I have run my RP (with SU carb and 37 head) on every type of commercial fuel and not noticed ANY difference. It currently runs on the cheapest available at the pumps, 95 E10 and I cannot understand why anyone would want to spend more money on petrol that makes no appreciable difference to performance or economy. During the post war years it wasn't unheard of to add paraffin to eke out the fuel ration, and you could probably get away with adding some diesel as well.

I wouldn't worry unduly. If your car is in good order it will run on whatever you give it.