Does any of the following conditions mean head gasket problem... Oil in engine coolant, engine coolant in oil.... I know the seocnd one does, but what about the first.. Today I had my engine coolant flushed and changed.. I was told there was oil in the coolant... I don't notice any problems like overheating smoke coming out from the exhaust or stuff so I wasn't sure... I had asked them to check when the changed it because in the reserve tank the coolant didn't look right... Thanks