But the first drain of the factory fill was basically just clean oil. It smelled a bit sharp, which I imagine was from the first tank of 87 that the dealer put in, but other than that it was good clean oil.
When we bought our Stinger, the dealer told us the engine had break in oil. Not sure if that is accurate, but if it is, they may use it in the 2.5L. Perhaps that was the smell?