My LS Zetec must be a freak because I have no problems with anything... the pinging others have is a concern but I've thrashed this thing from day one and never heard any pinging or protests at all.
I got stuck with a tank of 91 RON for the first time last week but never again. It lost a fair bit of HP and ran noticably flat and lifeless. This was the fist time it's had 91 RON and I listened very carefully - but no pinging thankfully.
There must be
ECU issues on some cars - curious. Maybe the temp range of the spark plugs??? I'm at a loss.