My first real thread. HA! Anyhow, just curious about what you guys are using to fill up your Contours. I know the SVTs are tuned from premium and the regular Duratecs can use regular. With my Cougar from what I've experienced, I can't put anything but premium without it pinging. It will only do it under load w/ regular gas in it. Since I noticed it was detonating, I put premium in it and no more pinging under load b/c I know this is super stressful on the engine and I don't want a hole through my piston(s). I thought maybe the combustion chamber, intake and exhaust valves being dirty and causing the combustion chamber temperature to go through the roof but I've always ran that STP complete fuel system cleaner before every oil change. I've seafoamed every 5-10K miles as well. Car runs amazing as well. No problems.
Ideas? What do you use? Any pinging for you SEs on regular fuel? I don't get it :shrug:
Ideas? What do you use? Any pinging for you SEs on regular fuel? I don't get it :shrug: