Just checked the oil on my Civic with over 150K on the engine and 2500 on this oil change. I added almost a full quart makeup oil a few weeks ago but that has about 500 miles on it now. The oil color looks like it's straight form the bottle. I could drain it back into the empty quarts and sell it as new! I'm running NAPA syn. It's always amazed me how clean this oil stays until about 5K. Then it gets a darker amber color. Like a good IPA. Right now it looks like Coors Light.