My 02 s10 4.3L had the dreaded head gasket leak at 102k miles. Coolant did not get in the oil, it jus leaked on the garage floor. I pulled the top off and this what was there. It was kinda hard crusty type sludge. I wished I took more photos but I wanted to complete the repair before the end of the day. I cleaned the gasket surfaces and used the metal felpro replacement gaskets and rtv, buttoned it back up and let the etc dry over night. I drained and filled w syn blend 5w30 from my oil stash and a new purolator classic. It's been about a 1000 miles since this repair and no leaks, the engine is running very smooth, oil pressure is normal. Because everything appears to be running normal, I figure I should just change the oil regularly and be done with it. Do u think I need to do a cleaning regiment, like a flush, or mmo, or short OCI, or hdeo