Originally Posted by
foama
If an ignition coil were shot, it would not run acceptably.
My experience with additives for the fuel has shown they benefit the industry more than the car.
If the fuel is too low octane and knocks, the sensor tells the ECU and it adjusts accordingly. Pinging noises are not normal. Did you buy it new?
If you live in the northern parts, say Rockhampton or higher, 10w 30 doesn't seem too thick. Try to get an oil compliant with ILSAC GF-5 and change it timely. See the owners manual.