Hot or col oil change

I've alway been of the opinion to drain oil while it's all seeped into crankcase rather than change it hot when ,after running , it's still all over engine. Ideally it would be best to the plug on hot engine and give it plenty of time but not always practical to wait. Opinions?
 
Drain it when the oil is fully up to temperature and immediately after shut down.

I usually let it drain for hours.

Dean
 
DRAIN WHEN HOT RIGHT AFTER SHUTTING DOWN SO THAT EVERYTHING IS in suppection, like others have said let it drain for a long time.
 

Hot is best because the heat and circulation suspend contaminants better which allows them to drain instead of sitting on the bottom of the oil pan . Full synthetics do a superior job keeping contaminants in suspension when cold but on an old neglected motor may loosen up sludge and allow it to be sucked into the pump and straight to the bearings . Motor flush and other oil cleaners may have the same effect . These motors do not filter the oil first so internal contaminants are a problem .

Best thing you can do for an old motor is change the oil when it starts to become dirty looking on the dip stick . No need for fancy oils or additives . Unless you have severe low oil pressure an average brand 10w-30 changed often would do the most good .
 

i'll add my name to the list of folks who say hot. i don't let it drain overnight, but i do wait until it has stopped coming out any faster than a drip every few seconds.
 
I always drain the oil when its warm. I go for a spin down the road, usually a half mile or so and its well up to temp.
I never let it drain for more than a hour, due to road dust.
 
(quoted from post at 20:39:36 03/12/17) I always drain the oil when its warm. I go for a spin down the road, usually a half mile or so and its well up to temp.
I never let it drain for more than a hour, due to road dust.

I changed the oil in my neighbors truck today. Dropped the filter and pulled the plug. Went and had lunch for an hour. Came back and still very slow drip from the drain hole -- just like oil still be drippin' from the pistons, rods, walls and crank.

So when I went back under, I had a little black oil available to lube the plug gasket. :D

But I wish I had added a plank to my right ramp to boost that side of the truck for the most efficient drain out the plug hole over that hour's time.
 

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