I've always put 87 in my SE...I have the SVT duratec so I should be using 93. I never even realized this.
What exactly does pinging sound like? I'm not sure if I've ever noticed it.
well that is a mixed bag. the engine should have premium because of the compression ratio. but if you are still using the SE PCM it doesn't have the same timing curves as the SVT PCM. So by the PCM you don't need premium .....
I am not sure that I can discribe the sound never believing I have heard it before put I believe you would know.