Xoutpost.com - Engine Oil Color Normal?

OK, now with references.

Quote:

Originally Posted by excerpt from the publication Motor Oils and Engine Lubrication, author Dave Mann, SAE

Oil Color, Lubrication Ability and Contamination Level
It is a common misconception that an oil’s color is an indication of how “dirty” it is. This is not true. It is often a common tactic used at quick lubes and service centers; the technician pulls the dipstick and wipes it on a white shop cloth and shows the customer how “black and dirty” it is. Any oil will turn black after a short period of use. Some oils may stay “clean” looking longer than others, but eventually they all will turn black. This is perfectly normal.

Mr. Mann is listed as a professional grade member of the Society of Automotive Engineers. I was only an associate member of SAE. Hands up everyone else who has worked in an oil analysis lab doing sampling and interpretation work before, though. :rofl:

Bottom line, the colour of used motor oil is completely irrelevant, and it is a myth that just won't die.