Quote:
Originally Posted by TrackRat
Adding 1 qt. of the wrong oil is unlikely to cause issues especially since you're having it changed tomorrow. A complete fill of the wrong oil might be a different story depending on the oil.
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Correct. A few quarts of the wrong oil (even it were the cheapest swill) won't cause any issues if you're going to change it soon.
Just drive as normal and you'll be fine. I probably wouldn't volunteer the information to the dealer though.