I put in Optimax the other week and it is good stuff. Cars pulls better and feels better in general.. But since I have put it in when I turn the ignition on but don’t start it, I get a weird noise for a few seconds like the fuel pump priming and the petrol whishing around - louder than normal.
Does this sound bad? Or is it just a ‘side effect’ of the higher octane fuel? Hope it’s not a trip to the dealers
Thanks for any advice