Quote:
Originally Posted by Clipdat
I am not trying to be argumentative, but I fail to see the logic in turning on a cold engine and drawing up oil out of the pan, versus just draining when cold so the maximum amount of oil is already sitting in the pan.
With modern synthetics, I don't feel that it would be advantageous to put a "coating" on key engine components like what you are describing. It's not going to be running "dry" at first startup after oil change because there's always a thin film/coating and you're never going to be able to get all the oil out of the motor even if you let it drip for 6 hours or overnight.
Perhaps a better method for not "running dry" upon first startup after oil change would be to prime the oil filter with a half quart or so so that there's already oil in there for the motor to draw from versus an empty filter.
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There is also the side benefit of warm(er) engines having flowed, so whatever debris is not settled on the bottom of the pan.
While I do agree on the engine protection part, the general rule I follow is to make sure the engine has warmed up sufficiently to have it be warm/borderline hot to the touch.
Warm/circulated oil also helps reduce buildup by allowing any contaminants that have settled to the bottom of the pan to be drained out with the oil.
-alex