Oil change temp, hot or cold or warm?

[FIRE UP]

Gents,
Well, to start off with, I've been changing oil in my own vehicles for decades. I've done it cold, warm, hot and almost burnt my hands temp too. The "Scuttlebutt" in general is to do it warm. But, I've never seen any documentation, from any source, any authority, any manufacturer, on the ANY or true benefits of changing it when it's warm.
Some say you "suspend" all the little bad guys, aka particles of impurities, metal particles etc. once it's warm and therefore, they will drain out with the oil. Hmmmmmmm. Does that mean that when the oil cools down, all those little bad guys fall to the oil pan floor and stay there, stuck to the floor, and not come out during a "cold" temp oil change?
Is there any written proof, scientific, technical, lab, or otherwise, that a warm engine oil change will prolong engine life? It really is no big deal to me. I just simply start her up, let it get to a temp that I think I can handle without causing my skin to sluff off along with the draining oil. I've done it with rubber gloves and without. When I was young and stupid, I didn't protect anything, hands, eyes, ears etc. while I was working but, as I got older, and hopefully a bit wiser, I started protecting the stuff that God gave me.
So, I use rubber gloves when I do it. Anyway, anyone have a shred of proof that it makes a "grand" difference in ANYTHING, engine life, longevity etc. for a warm, hot or cold engine oil change?? Thanks.
Scott

[rebelone]

I think that it only makes it drain faster, when warm. Other then that? To me hot or cold makes no difference.
Rebel

[atomic98]

drain it hot. THere are small particles that the oil filter cannot get out of the oil. while the engine oil is hot, these particles will be suspended in the oil. If you wait for the oil to cool, these will grab on to the components of the block and pan.

[TW]

Never heard of a COLD OIL Change. I do / did it HOT, that means I drive it before the change to NORMAL Oil Temperature.

[1ciderdog]

If you add one of those Fumoto oil drain valves (or similar product) you won't burn yourself, or drop the hot drain plug in your pan of oil. Less mess.
Safe Travels
Bob

[Tha_Rooster]

I change mine warm/ hot and it will drain for at least 20 minutes I try to get a much out as it will drain.

[Martind4]

Quote:

Originally Posted by FIRE UP Anyway, anyone have a shred of proof that it makes a "grand" difference in ANYTHING, engine life, longevity etc. for a warm, hot or cold engine oil change?? Thanks. Scott

That would be a good question for the folks at Blackstone Laboratories www.blackstone-labs.com They do oil analysis of all kinds and have a newsletter that might cover the topic of hot/warm/cold oil changes.

Blackstone recommends that a sample be taken after the engine is at operating temp for at least 20 minutes to insure that any moisture or unburned fuel is cooked off.

[Skip426]

Cat, engine maintenance manulal, says warm for the reasons you list. Suspended/settle. MHO, having pulled the oil pan off many a failed engine,seeing the sludge that can stick to the inside of an oil pan, gather in crevases, even build up on cranks and cams, I change my oil at full operating temp, and as another poster has stated I let it drain and drain and drain. Even with that there are 3 quarts of oil in the engine that you can't drain ; short of a full o'haul; so change oil regularly.

[CAT Lover]

Drain it warm to hot, WHen I have my truck serviced I make them run fresh oil thought he motor until it comes out clean though the drain plugs. This gets alot more dirty oil out.

Also make sure they fill the oil filters with oil before starting. Starting the motor with an empty filter could blow the HEUI pump & injectors in the 3126.