So I've had the LC for 3 months and put 3k miles on it. The PO didn't do much pm and the truck sat for years. I baselines it when I got it and since have always been worried about a blown head gasket so I sent off an oil sample last week. I got a call today from BSL saying they did not find any coolant in the oil but did see lots of lead. They say typically levels around 2ppm and I was 400ppm. He recommended not driving and I may have thrown a bearing. Car drives fine (weird hesitation accelerating) but no drops in oil pressure. My mechanic said drive it and retest in 1000 miles. Anyone have any thoughts. Thanks.