Could be that you are not getting all the old oil out which would put you at over 5.5 qts.I didn’t want to start another oil thread … ‘14 Vintage…5.5 qt capacity … I just changed my oil yesterday. Today, I took the K&N air filter out to inspect and clean it and there was about 1/2 oz of oil in the cover plus whatever else was absorbed by the air filter. It was clean oil. I do use a K&P reusable filter, which I believe is less volume than a regular disposable filter. I have an oil cooler, but I don’t believe it’s a factor. I’m considering only adding 5.25 qts on the next oil change. To see if I still get the over flow. Has anyone else had an overflow issue and under filled to see if it made a difference?