Curious as to what some of the engine builders crew think may have caused this. Engine is a pretty strong built GM 3.1 Engine. http://www.edwardsracing.net/off_topic/engine.jpg Custom Grind Crower Camshaft. Engine I would say has about ~25,000 miles on it. Used a proper break-in technique with non-synthetic oil then Mobil 1 after that. Has had 2 running issues with oil changed every 3,000 miles. The last oil change was around 2,500 miles and the magnetic drain plug/oil was fine. Oil now looks like a special "Sparkle Edition" oil and the drain plug was COVERED with metal shavings along with oil coming out of the oil filter. We haven't had a chance to meet with the engine builder yet, but some suggestions have pointed towards the oil itself (rumors that Mobil 1 doesn't have the same additives it used to have and has shown signs of advanced wear on flat-tappet cams) or valve springs possibly too strong.