I recently ran 8 ounces of Seafoam through the intake of a Porsche race car and let it soak for 5 minutes...Fired up the engine with the typical smokey result and the car idled and revved much smoother. I sent in a UOA with approx 10 hours on the oil and it came back high in lead and chromium(ring material). This engine has around 50 total hours on it and always had a fairly clean UOA, again being a race engine. I have always used either Brad Penn or Redline. Not worried really, just curious if Seafoam would impact the UOA so dramatically.