Sadly, I took my jeep into the dealer for an oil leak which I'm pretty sure was coming from just the intake manifold gasket, along the lifter valley, but they've decided that it could be the head gaskets as well, so they are replacing them too. Assuming they change oil and filter after doing this, how long do you guys think I should run that oil afterwards? Should I do another oil change after that one as well? I'm sure they are going to get some dirt in the engine, and I'm pretty sure you cant fully drain those blocks of coolant, so there may even be some coolant that finds its way into the crank case. If they dont' change the oil, i will do it as soon as i get it home, but hopefully they are somewhat competent. I'm a diesel mechanic for a living and I'm the type that doesn't feel comfortable having someone else work on his stuff.