I took my 2005 Nissan Pathfinder V6 for an OIL change to Nissan dealer. They accidentally fill it up as if it was ARMADA V8 engine. I saw oil leak from the drain plug area and felt that engine was vibrating more than normal. Took it back next morning and I was told that it was over filled almost 1.5 quart. They replaced some sort of seal/gasket by drain plug and told me that it should be fine. There are no more oil leaks. I just drove 2000 miles last week after that and still no oil leaks. Should I still be concerned? What are the chances that it has made my engine weaker or damaged it?