This is an interesting thread. My V8 has started to ping a lot more and is lacking power off the mark (it has snuck up on me over time and is now very obvious to me)....I have recently done coil packs, leads and plugs - all stock.
So its new MAF time again (the currrent one is about 3 years old and I have tried MAF cleaner several times). I will post back, but its my bet that it will be the culprit.
BTW if the fuel is distilled at "the same place" why in Qld does BP have its own refinery at Bulwer Island and Caltex have their own at Lytton and Shell have their own down south and in WA....thats where oil is made into petrol and other products, so it IS different.
Cheers

