A couple of Winters ago my supercharged 96 developed a HG/LR-Ping that it really never had before. It was awful. I was using Exxon gas. I got a tank of Amoco and it suddenly went away. Next tank was Exxon and it pinged like crazy again. I stopped buying Exxon until Spring hit. The same thing has not happened since that Winter. Odd...

Gadget