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Which method drains more oil?

C

CRUZer

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Joined
Jan 28, 2007
Location
CA
Moto(s)
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Every service manual I have read states you should let the engine run for a few minutes to warm the oil up before you drain it. My question: Wouldn't more oil be drained if you did it while the bike is stone cold since more time has elapsed, allowing more oil to settle in the oil pan?

I'd prefer to change the oil and filter with the vehicles cold for a variety of reasons but I'm curious if it results in more or less of the oil being drained.
 
They tell you to warm it up for 2 reasons. 1; If you live some where extremely cold the oil will come out much faster. (think nebraska in the winter) 2; the small particles that settle during long periods of non use will get re-suspeded in the oil and come out with the oil instead of staying in the bottom of the pan. Best method if you want to get the most out is to warm it up pull the drain plug and let it drip all night but unfortunatly most people have better things to do(like ride) than make an oil change a 2 day job.
 
The best time to drain motor oil is 5 minutes after a decent ride. The smaller unfiltered particles in the oil are now suspended in the oil itself rather than accumulating in a layer on the bottom of the oil pan. Hot oil flows better than cold, thicker oil. The only hassle is the heat- you can burn yourself if you don't prepare accordingly.
 
I didnt consider the particles/sludge factor. Thanks, I will continue doing it as the manual suggests.
 
Change it right after riding a fully warmed bike. Let it sit dripping for 15 mins. Get back on the bike shake it between your legs to get all the oil on the sides out (lean it in diff directions and watch for more oil to come out. Really fancy engines come with multiple drain plugs to make a simple 10 mn job into a 40 mn mess.)

If you don't know how much came out and your bike has the most inaccurate and idiotic system of checking oil, then pour the oil into qt. bottles and put exactly that much back in. I like to fully fill the oil filter too. I never pay for oil changes cuz I don't think anyone does this.
 
theAmazingKickstand said:
Change it right after riding a fully warmed bike. Let it sit dripping for 15 mins. Get back on the bike shake it between your legs to get all the oil on the sides out (lean it in diff directions and watch for more oil to come out. Really fancy engines come with multiple drain plugs to make a simple 10 mn job into a 40 mn mess.)
Click to expand...

my method as well except i let it drain for an hour maybe more then tilt the opposite direction of the side stand..............i go 1 step further i turn the motor over for 3-4 revolutions and watch even more oil come out.:thumbup
 
hahah this may turn into a 10page shitstorm now.

If you decide to go for the engine turn method disconnect the spark for the safety of your engine.
I change oil so often and over do it so much I don't think whatever left will have any effect on longevity......and the tiny chance of spinning a bearing or something.
 
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i would say the way to drain the most and fastest way is to start your motor with a loose drain plug and go for a short - long ride.
it will get ALL of the old oil out of your motor very very fast. :rofl :shocker


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theAmazingKickstand said:
hahah this may turn into a 10 page shitstorm now.
Click to expand...
oh thats entirely possible. that said its a very simple turn over(not running) method and quite aware of the backlash it may get.........but frankly the internal engine parts are no where close to being dry when performed so quite safe. BTW with the kill switch in the 'OFF' position no chance of vroom vroom.

If you decide to go for the engine turn method disconnect the spark for the safety of your engine.
Click to expand...

most certainly
 
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packnrat said:
i would say the way to drain the most and fastest way is to start your motor with a loose drain plug and go for a short - long ride.
it will get ALL of the old oil out of your motor very very fast. :rofl :shocker.
Click to expand...

i'll give this a go and let you know the results. :teeth
 
You'll never drain all the oil without tearing down the engine - there's usually at least .25 liters left, often more. The service manual will sometimes tell you how much.

As mentioned, after a ride is best - you want to churn the oil and put all the particulates into suspension. The labs will ask you to ride before taking a sample for exactly this reason.
 
Has any body else ever heard that filling the oil filter is bad? I think it was my high school auto shop teacher (1989) that said doing this can make it take longer to get pressure due to an air lock scenario and also you are putting un filtered oil into the bearings by filling the post-media area of the filter. Not saying he was right just throwing it out there for discussion.
 
I used to do it on my BMWs, where the oil filter was mounted to the bottom of the bike and doing so wouldn't create a mess. Not really necessary, but IMO it doesn't hurt anything at all. Fresh oil shouldn't have any particulate worth worrying about, I wouldn't do this with used oil, of course.
 
My auto shop teacher (1998) said this is by the far most important step. This way your engine isn't running dry until the oil filter fills up with oil.
 
motobecane10 said:
oh thats entirely possible. that said its a very simple turn over(not running) method and quite aware of the backlash it may get.........but frankly the internal engine parts are no where close to being dry when performed so quite safe. BTW with the kill switch in the 'OFF' position no chance of vroom vroom.



most certainly
Click to expand...
most bikes won't crank with the killswitch off.
 
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