:rolleyes: Premium will not burn up your plugs or make the car run rich or wreck anything in the car. It WILL make you faster by making your wallet lighter if you don't need it. That said, if you ping, use the lowest grade that you don't ping on until you fix the problem. Maybe an intake cleaning? It could be bad gas if it is a one time thing.
The non-SVT PCM is programmed for timing that can use 87 octane, so pinging is not normal. A chip advances timing, which is why they tell you to use higher octane. A chip is the only way to change timing (well, there are a few others but they are much more $$$).
Redline actually makes a good in-tank FI cleaner (unlike the rest which are junk). Try a bottle of that.
Checking the knock sensor won't fix the cause of the pinging.
A bad O2 could cause pinging if its leaning out the car, but by the time it does that you should have thrown a CEL.
Hope y'all don't mind my trolling, but I wanted to throw in some good advice to increase the sig/noise ratio in this thread.
