Draining used engine oil...

Rob YZF250
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Rob YZF250
Hi guys, hope everyone is good !

I am bringing this subject up due to a friend who owns a Aprilia Tuono 1000 road bike who recently told me he drains his used oil with a cold engine, not starting the engine up first to heat up the used oil to thin the oil then drain it which i thought is necessary.. So i am wondering who does it this way or starts the engine up first til the used oil is warm / hot then drains their oil ? My friend seems to think either way does not make a difference. Interesting..

Thanks.
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pCp 252
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pCp 252 11/14/2019 6:10pm
11/14/2019 6:10pm
It’s not critical, but good practice id say. If it’s colder than 35° outside, I will always warm it up. Be advised, the oil will be aerated and may appear milky compared to oil that’s been sitting. Nothing to worry about.
Rob YZF250
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Rob YZF250 11/14/2019 6:13pm
11/14/2019 6:13pm
pCp 252 wrote:
It’s not critical, but good practice id say. If it’s colder than 35° outside, I will always warm it up. Be advised, the oil will be...
It’s not critical, but good practice id say. If it’s colder than 35° outside, I will always warm it up. Be advised, the oil will be aerated and may appear milky compared to oil that’s been sitting. Nothing to worry about.
I live in England, it’s far from warm most days man. Grinning
Project 2501 11/14/2019 6:33pm
11/14/2019 6:33pm
There is some evidence you remove more oil cold. It has already settled. The act of running the engine redistributes it. That said, I like the scalding burn I always get.
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Rob YZF250
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Rob YZF250 11/14/2019 6:55pm
11/14/2019 6:55pm
Project 2501 wrote:
There is some evidence you remove more oil cold. It has already settled. The act of running the engine redistributes it. That said, I like the...
There is some evidence you remove more oil cold. It has already settled. The act of running the engine redistributes it. That said, I like the scalding burn I always get.
Me and my friend was talking about this, if you would get more used oil out when it's warm / hot due to thinning and not being thicker when sat cold and he said he always drains his cold without starting the engine to run for a good few minutes and as it has not been thrown around the engine from not being started up to get warm he thinks you will get more used oil out that way too also he says it's all a myth running it up before draining..

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Project 2501 11/14/2019 7:00pm
11/14/2019 7:00pm
Project 2501 wrote:
There is some evidence you remove more oil cold. It has already settled. The act of running the engine redistributes it. That said, I like the...
There is some evidence you remove more oil cold. It has already settled. The act of running the engine redistributes it. That said, I like the scalding burn I always get.
Rob YZF250 wrote:
Me and my friend was talking about this, if you would get more used oil out when it's warm / hot due to thinning and not...
Me and my friend was talking about this, if you would get more used oil out when it's warm / hot due to thinning and not being thicker when sat cold and he said he always drains his cold without starting the engine to run for a good few minutes and as it has not been thrown around the engine from not being started up to get warm he thinks you will get more used oil out that way too also he says it's all a myth running it up before draining..
I was trying to find it but there is a study where they do 5 engines hot vs cold and in 4/5 cold resulted in more removed after x minutes. A boxer engine that can trap oil horizontally was the outlier. Anyway I still do it warm because I want my father to love me.
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kb228
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kb228 11/14/2019 7:18pm
11/14/2019 7:18pm
Hot oil is thinner and drains faster.

All there is to it
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rbspecial138
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rbspecial138 11/14/2019 8:41pm
11/14/2019 8:41pm
I think there’s definitely a right answer here, my manual says to warm the engine up, and then let it sit for 5 minutes before draining the oil. Therefore; the oil will be warm and thus drain quickly and also it will have plenty of time to drain from the head to the bowels of the crankcase. How long do you think it takes a liter of warm oil to settle? Not long.
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Thisusernameisavailable 11/14/2019 11:38pm
11/14/2019 11:38pm
I got in to the habit of preparing my oil drawing kit before the last Moto. (Ratchet, socket, drain pan, gloves)
I’d do the last moto, go straight back to the van, lean the bike up against the van and pull the sump plug out right away. It was weirdly satisfying. By the time I’d changed and loaded the van it had drained good, put the plug back in before loading the bike.
I’d also make a point of removing the plug again when I got home to release the last few ml that had made its way to the bottom by moving the bike around.
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cody41
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cody41 11/15/2019 4:19am
11/15/2019 4:19am Edited Date/Time 11/15/2019 4:21am
I always drain my oil cold. When you warm he bike up the oil splashes splashes on everything. Sure it thins the oil, but you now have oil all over the place which takes awhile to completely run off unless you let the bike sit, but then the oil is already cooling.
cody41
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cody41 11/15/2019 4:20am
11/15/2019 4:20am
Honda Man 66 11/15/2019 6:33am
11/15/2019 6:33am
I was taught to warm the engine by riding the bike, not just running the engine. The small metal particles in the trans get stirred up and suspended in the oil and then drain out.
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Jeremy Macbeth 11/15/2019 8:23am
11/15/2019 8:23am
Honda Man 66 wrote:
I was taught to warm the engine by riding the bike, not just running the engine. The small metal particles in the trans get stirred up...
I was taught to warm the engine by riding the bike, not just running the engine. The small metal particles in the trans get stirred up and suspended in the oil and then drain out.
Um, you shouldn't have small metal particles in your transmission. Also, get a magnetic drain plug. Also, take it easy on your transmission.
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Honda Man 66 11/15/2019 8:47am
11/15/2019 8:47am Edited Date/Time 11/15/2019 9:42am
Jeremy Macbeth wrote:
Um, you shouldn't have small metal particles in your transmission. Also, get a magnetic drain plug. Also, take it easy on your transmission.
Um, as your clutch wares, where do you think it goes? Next time you change your oil, stick your finger in it while it is draining. Then go out into the sun and look closely at it. You might need to pull your head out of your ass and put your glasses on. You’ll see tiny particles of aluminum from your clutch. You might already know aluminum does not stick to a magnet.
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Falcon
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Falcon 11/15/2019 9:16am
11/15/2019 9:16am
Oil runs out more quickly when hot, but that's about the only benefit. Even when cold, it's still a liquid and will run out if you give it time. Plus, you get the added benefit of having sat since the last time you rode and the oil isn't clinging to the moving parts at the moment. All the particles which were suspended in the oil when it was running have now settled to the lowest point - basically the drain plug - and now they will be swept out with the oil as it leaves the drain.
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Honda Man 66 11/15/2019 9:39am
11/15/2019 9:39am
Falcon wrote:
Oil runs out more quickly when hot, but that's about the only benefit. Even when cold, it's still a liquid and will run out if you...
Oil runs out more quickly when hot, but that's about the only benefit. Even when cold, it's still a liquid and will run out if you give it time. Plus, you get the added benefit of having sat since the last time you rode and the oil isn't clinging to the moving parts at the moment. All the particles which were suspended in the oil when it was running have now settled to the lowest point - basically the drain plug - and now they will be swept out with the oil as it leaves the drain.
That’s the other theory, and I won’t say it is wrong. At least we are in agreement that there is metal in there and it needs to get out.
Hudd_421
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Hudd_421 11/15/2019 9:47am
11/15/2019 9:47am
So both works...If you have time, run it and wait a few minutes. If you are like most of us and just want to change the oil quick, dump her cold. Boom, end thread.
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Rob YZF250
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Rob YZF250 11/15/2019 10:58am
11/15/2019 10:58am Edited Date/Time 11/15/2019 11:01am
Hudd_421 wrote:
So both works...If you have time, run it and wait a few minutes. If you are like most of us and just want to change the...
So both works...If you have time, run it and wait a few minutes. If you are like most of us and just want to change the oil quick, dump her cold. Boom, end thread.
The point of this thread was to see what is the best correct way to do so without possibly doing damage in the long run if drained when cold. As I was not sure about draining used oil when cold but my friend seems to think it's ok with his road bike.
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Rob YZF250
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Rob YZF250 11/15/2019 11:02am
11/15/2019 11:02am
Falcon wrote:
Oil runs out more quickly when hot, but that's about the only benefit. Even when cold, it's still a liquid and will run out if you...
Oil runs out more quickly when hot, but that's about the only benefit. Even when cold, it's still a liquid and will run out if you give it time. Plus, you get the added benefit of having sat since the last time you rode and the oil isn't clinging to the moving parts at the moment. All the particles which were suspended in the oil when it was running have now settled to the lowest point - basically the drain plug - and now they will be swept out with the oil as it leaves the drain.
From the way you have put it, seems like it is better to do when cold.

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kb228
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kb228 11/15/2019 11:30am
11/15/2019 11:30am
Hudd_421 wrote:
So both works...If you have time, run it and wait a few minutes. If you are like most of us and just want to change the...
So both works...If you have time, run it and wait a few minutes. If you are like most of us and just want to change the oil quick, dump her cold. Boom, end thread.
Rob YZF250 wrote:
The point of this thread was to see what is the best correct way to do so without possibly doing damage in the long run if...
The point of this thread was to see what is the best correct way to do so without possibly doing damage in the long run if drained when cold. As I was not sure about draining used oil when cold but my friend seems to think it's ok with his road bike.
I dont understand what damage can occur if its cold.

Just change the oil. End thread.
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ridinbeast932 11/15/2019 11:38am
11/15/2019 11:38am
I drain it cold then run the bike a few minutes to get the rest out. Works good. Laughing
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Falcon
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Falcon 11/15/2019 12:03pm
11/15/2019 12:03pm
Falcon wrote:
Oil runs out more quickly when hot, but that's about the only benefit. Even when cold, it's still a liquid and will run out if you...
Oil runs out more quickly when hot, but that's about the only benefit. Even when cold, it's still a liquid and will run out if you give it time. Plus, you get the added benefit of having sat since the last time you rode and the oil isn't clinging to the moving parts at the moment. All the particles which were suspended in the oil when it was running have now settled to the lowest point - basically the drain plug - and now they will be swept out with the oil as it leaves the drain.
Rob YZF250 wrote:
From the way you have put it, seems like it is better to do when cold.
To be fair, some of the particulate that was in suspension will settle on the moving parts as the oil settles to the bottom. This stuff isn't coming out anyway, even if you drain the oil while hot. The only way I can see to be perfect would be to flush the engine with clean oil first, and then add new. (Expensive!)
Falcon
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Falcon 11/15/2019 12:04pm
11/15/2019 12:04pm
ridinbeast932 wrote:
I drain it cold then run the bike a few minutes to get the rest out. Works good. Laughing
Laughing

Gotta remove the clutch cover first, for maximum fling factor.
Rob YZF250
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Rob YZF250 11/15/2019 12:07pm
11/15/2019 12:07pm
Hudd_421 wrote:
So both works...If you have time, run it and wait a few minutes. If you are like most of us and just want to change the...
So both works...If you have time, run it and wait a few minutes. If you are like most of us and just want to change the oil quick, dump her cold. Boom, end thread.
Rob YZF250 wrote:
The point of this thread was to see what is the best correct way to do so without possibly doing damage in the long run if...
The point of this thread was to see what is the best correct way to do so without possibly doing damage in the long run if drained when cold. As I was not sure about draining used oil when cold but my friend seems to think it's ok with his road bike.
kb228 wrote:
I dont understand what damage can occur if its cold.

Just change the oil. End thread.
If I am not sure on it when cold then I am also not sure if damage could be done in the long run as I normally do this when warm / hot.

No need to be a donut about it.
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Rob YZF250
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Rob YZF250 11/15/2019 12:09pm
11/15/2019 12:09pm
ridinbeast932 wrote:
I drain it cold then run the bike a few minutes to get the rest out. Works good. Laughing
Laughing
Hudd_421
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Hudd_421 11/15/2019 12:26pm
11/15/2019 12:26pm
A bike that has been properly maintained has never experienced failure as a direct result of draining the old hot or cold...
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Rob YZF250
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Rob YZF250 11/15/2019 12:35pm
11/15/2019 12:35pm
Ok. Like I already said I was not sure doing it when cold as never done when cold before.
fourfourone
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fourfourone 11/15/2019 1:12pm
11/15/2019 1:12pm
just don't do an oil change. They are overrated anyway
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Rob YZF250
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Rob YZF250 11/15/2019 1:14pm
11/15/2019 1:14pm
fourfourone wrote:
just don't do an oil change. They are overrated anyway
Cool
ctbale
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ctbale 11/15/2019 1:28pm
11/15/2019 1:28pm Edited Date/Time 11/15/2019 1:30pm
Cant believe this is even debatable.... Hot. Pull the plug 30 seconds after shutdown. Its not to get more oil out, its to get suspended contaminants out. I lean the bike both ways after it stops flowing too, but thats just me.
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Honda Man 66 11/15/2019 1:35pm
11/15/2019 1:35pm
I agree. A lot more oil comes out when you lean it both ways. I would guess about 100cc’s
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