340 Duster oil looks milky

sizzling coolant has a very distinctive aroma.
Didn’t catch an aroma. Was disheartened just by hearing the sizzle. What puzzles me though is after checking the dipstick I let it settle for a few days before letting it drain out for inspection and it all came out the same texture/color, you’d think after a few days of setting the coolant would have found its way to the bottom.