VW in their manuals used to say let it drain til it is dripping at rate of one drop every 20 seconds
Draining oil overnight, any difference?
- Thread starter abimanyu
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That is crazy. When I change the oil in my E30, I've never been able to wait long enough for it to drip that slowly. I use a thicker oil (GTX 20w50, then Mobil 1 15w50). If I wait 30 minutes after pulling the drain plug, it still drips at a rate of about once every 4-5 seconds.
Wanted to add that even changing the oil in my 2002 Altima (Mobil 1 Extended Performance 5w30) doesn't get it to slow that much. Once every 20 seconds is pretty slow!
OK....
Now if some of us are willing to plop down good coin to have a lab take a look at our used oil, then we should not have a problem with providing the very best of sample controls.
I guess the degree of that is a personal choice, but providing the best enviroment will provide the best info.
Especially if you are comparing oils. Do we truely get a good read if there is another oil left in the engine? Perhaps some of the previous oil's magic is remaining and unfairly shows a good read for the current oil??
I think being consistant in our method is probably as important as anything for good trending data.
If I'm not monitoring an engine, and I am confident with how the oil performs and for how long, a normal oil change with a flush from my top-off bottle is all it gets.
Now if some of us are willing to plop down good coin to have a lab take a look at our used oil, then we should not have a problem with providing the very best of sample controls.
I guess the degree of that is a personal choice, but providing the best enviroment will provide the best info.
Especially if you are comparing oils. Do we truely get a good read if there is another oil left in the engine? Perhaps some of the previous oil's magic is remaining and unfairly shows a good read for the current oil??
I think being consistant in our method is probably as important as anything for good trending data.
If I'm not monitoring an engine, and I am confident with how the oil performs and for how long, a normal oil change with a flush from my top-off bottle is all it gets.
I would bet my house that no one could ever prove that letting the oil drain for more than 10 minutes has any effect, measurable or not, on the longevity or long-term performance of a car engine. My bet is that dude with the million mile Volvo never resorted to such madness!
jeff
jeff
But I bet while he was changing oil he was checking everything else out....and that took longer than 10 minutes....and that led to longevity....mail me your keys LOL
I usually remove the oil pan, get out my pressure-cleaner that I prime with fresh oil and make sure there is no old oil left.
Serious: I warm up the engine, unplug, let it drain till the stream gets to a drip, then do my filter otherwise I get sprayed with oil, plug and fill. 10 Minutes.
Warming up my engine always takes me longer then necessary.
Btw, there is no specific drip time mentioned in my manual, it does state to warm up the engine.
Serious: I warm up the engine, unplug, let it drain till the stream gets to a drip, then do my filter otherwise I get sprayed with oil, plug and fill. 10 Minutes.
Warming up my engine always takes me longer then necessary.
Btw, there is no specific drip time mentioned in my manual, it does state to warm up the engine.
Triple_Se7en
$50 Site Donor 2024
Your engine stilll has close to a quart of old oil leftover. So what's the big difference between having 25 ounces or 27 ounces left in your engine?
Just where do you figure all that hot oil that doesn't want to come out is hiding???
Crawl under car, remove drain plug change filter. (I am now dirty from being under car and oil on hands) Wash hands clean up go to bed. Get up the next morning crawl back under car to install drain plug and remove oil pan. Install new oil. (Guess what, dirty hands and clothes again) That is what I meant.
This is all quite entertaining. IMHO I don't think it would make any difference. I just like to get it all done in 15 minutes. Besides, I never know when I might need to go somewhere while "my oil is draining all night long".
This is one of the silliest threads i have ever seen here.
speedtc,,AMEN!
When you "other side jackers"
and "overnite drainers"
sooner or later have an oil pump loose prime (and it WILL happen) ,,,,,Please start a thread and tell us all about it!
Two or three posters have already mentioned loss of prime. Just seems to go over most everybody's heads.
When you "other side jackers"
Two or three posters have already mentioned loss of prime. Just seems to go over most everybody's heads.
"Stupid is as stupid does." --Forrest Gump
1. You haven't been here long enough. These do crop up with some regularity.
2. To think, I contributed to it. . .
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Well, fresh off our last sword-crossing -- here's one in which we're in complete agreement.quote:
Originally posted by 427Z06:
"Stupid is as stupid does." --Forrest Gump
Do you people really think that draining the the extra 2oz of oil out is going to make your engine last longer?
I had a hunch you would come back from the dark side, eventually.
Heh, I think surfstar has a good point
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With regard to 15-20 minutes being enough to drain all the oil, I have cut open filter media hanging on a rack in my shop. The most recently removed filter is a good 3 weeks old and there is still a good little puddle on the ground underneath it everytime I came into the shop. Oil's job is to stick to things. It takes it a while to drain off.
'Course, letting it drain for 5 weeks is going to do nothing for the half quart or so I have sitting in top along the valve train...
'Course, letting it drain for 5 weeks is going to do nothing for the half quart or so I have sitting in top along the valve train...
If someone is really worried about getting as much old oil as possible just use some new oil, maybe a qt less than what is typically needed, as a flush. For PCMOs you can get decent oil on sale and do a flush for $3 or so, and a gallon of HDEO can be had for $6, or just use the oil that you plan on using.
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