Using some info off of Pat Kelley's site (where is he by the way? haven't seen him around in a while..), I decided to check my plugs just to see how I was running, a ball-park estimate. I only checked one because I was running short on daylight and patience (got headers). The one I checked (cylinder #4) showed a nice jetting, and the ground strap was changing colors at a good point on the strap. However, my porcelain was not white but was tan, almost orange. No black or metallic specks. Does this mean anything? They are Bosch Platinum plugs. Thanks.

A nice even tan color is perfect for a street car.

Troy.

My porcelin shows some tan and some yellow and some pink.... hooray for winter pump gas!