I recently did an oil change and if you are like me , you would wipe clean the bung area of the oil pan , start the engine and check for leaks at the filter and the oil bung. I did not get to the point of starting the engine. Why? It seemed to me that the oil bung was not seated as I normally see. Sure enough the old washer was still there. Geez. So I drained the oil and buttoned up things again. BUT what was interesting was how the new oil looked once it was drained. It looked dirty not like the clear light honey color of new oil. So I researched engine flush , the pro and cons and the various ways of doing so and the one that I like the most is actually doing an oil change as usual then drive for a bit then renew the oil and filter and take it from there. Seems like a waste and I question whether or not an engine flush is even necessary if you change the oil regularly. Thoughts?