I change my own oil. Is there any difference between draining the oil overnight until it doesn't drip anymore versus drain and fill right away?
Draining oil overnight, any difference?
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I guess one could argue either way as to the efficiency of both methods.....I drain until a very slow drip....then get my "flush oil" which is $1.00 per quart Trop Artic and pour about 1/2 a quart down the neck and it flushes out the remaining "stuff" from the old oil....I would submit my method gets more of the old stuff out versus draining for 12 hours
Cool Sgt Geek, since time is on my side, I'll do both!
You live in the Hill Country? I used to go to Schreiner College in Kerrville,TX. I love driving along that area in the Spring with all the bluebonnets in bloom!!!!!!! I sure miss that!
You live in the Hill Country? I used to go to Schreiner College in Kerrville,TX. I love driving along that area in the Spring with all the bluebonnets in bloom!!!!!!! I sure miss that!
Yup...just down the road outside of Boerne....get you some good flush oil and give it a whirl....pre fill your new oil filter...wet the gasket with new oil....dont over tighten your drain plug...your good
As Razl said, you still have a lot of oil in the top end and the nooks and crannys. In all honesty, that small amount of oil is going to make no difference. I generally let mine drain while I'm swapping the filter, then button it back up. By that time it's down to a few drips anyway, not enough to make any difference whatsoever.
Dead on correct. As an example, the owner's manual for the previous generation Camry (series that ended with the 2006 model) publishes two oil change amount figures (one with filter change, one without). The service manual, however, adds a third figure: oil fill amount after overhaul involving disassembly of block. that figure, IIRC, is 0.8 qts more than the "with filter" oil change amount. I traded my Camry V-6 18 months ago; I don't recall the other numbers.
Ok,thanks!
Yes, if you do an oil change you are replacing a fraction of the old worn oil and contaminants, and replacing it with fresh. Effectively, you are "diluting" the old oil and contaminants in the system with fresh oil.
The less old oil in the crankcase and lines, the less contaminants remain in the system. But you will never get it down to zero, and after a few hundred miles of driving on the new oil, it will be up to where it was if you only let it drain a half hour or so.
So it seems to me that it makes not much difference, particularly if your mileage between oil changes is less than the absolute maximum.
The less old oil in the crankcase and lines, the less contaminants remain in the system. But you will never get it down to zero, and after a few hundred miles of driving on the new oil, it will be up to where it was if you only let it drain a half hour or so.
So it seems to me that it makes not much difference, particularly if your mileage between oil changes is less than the absolute maximum.
Because my car takes 5.5Quarts I've always had .5 quarts to "flush" before filling with the other stuff. I'd like to believe that it takes out some old oil with it as well...
Your oil pump doesn't react well to being without oil for very long. So it probably isn't the best thing to have it drain over night.
Your oil pump doesn't react well to being without oil for very long. So it probably isn't the best thing to have it drain over night.
1q of leftover oil makes the case for keeping the same type oil in-service. I drain until it goes from a stream to drops.
1 quart of old oil left inside the engine really wont harm anything.
Its best to change the oil when it is hot (200* F)
Its best to change the oil when it is hot (200* F)
I personally think a good drain is important when changing from one brand of oil to another. If you are just going to fill up the crankcase with the same oil - draining all night is overkill in my opinion. If you have time, go for it!
May I ask why (uneducated here) it is best to change oil when it is hot? I've always changed it when it is cold.
May I ask why (uneducated here) it is best to change oil when it is hot? I've always changed it when it is cold.
"change oil when it is hot?"
Hot oil flows better, more is removed per unit time. In addition, little has settled yet. Everything that can be suspension is in suspension.
Hot oil flows better, more is removed per unit time. In addition, little has settled yet. Everything that can be suspension is in suspension.
I would like to add that I would rather restart my engine while there is still oil clinging to the parts rather than have it all drained down after letting it drain and cool all night. For those first few seconds when you restart, you have zero oil pressure until the filter fills.
Plus, why would you want to get dirty twice?
Just my opinion though...
Plus, why would you want to get dirty twice?
Just my opinion though...
i have the benefit of a lift so i just pull the plug, filter and then rotate the tires. after that put the plug and filter on and call it a day. this can also be done if you have the ability to put the entire car on jackstands.
i have personally seen many cars go 150,000 - 200,000+ miles on quick lube oil changes for its entire life. and they plug them up when they get to a very slow stream or a fast drip. jiffy lubes goal is to have a complete oil change done in less than 10 minutes. shell would not be harping on them if it was physically impossible to have a decent drain in that amount of time.
but if it really makes someone feel better that they put a half a qt through the engine, then they should do it.
i have personally seen many cars go 150,000 - 200,000+ miles on quick lube oil changes for its entire life. and they plug them up when they get to a very slow stream or a fast drip. jiffy lubes goal is to have a complete oil change done in less than 10 minutes. shell would not be harping on them if it was physically impossible to have a decent drain in that amount of time.
but if it really makes someone feel better that they put a half a qt through the engine, then they should do it.
what do you mean get it dirty twice?
I shouldn't even suggest this, especially here, but if you really want to go over the top, buy two filters and double the usual oil.
Drain and remove filter.
Replace filter and fill (maybe a quart or two shy of normal fill amount).
Start engine.
Shut off as soon as O/P light goes out or guage climbs and stabilizes.
Drain oil and remove filter -- yes, again.
Replace filter, and refill oil.
This ought to be enough to satisfy the most obsessive compulsive of the super-clean-crankcase crowd.
I'm -- ahem -- not saying how I know of this procedure, but I'm ahh pretty sure that some people have done this, at least in the distant past. . .
Drain and remove filter.
Replace filter and fill (maybe a quart or two shy of normal fill amount).
Start engine.
Shut off as soon as O/P light goes out or guage climbs and stabilizes.
Drain oil and remove filter -- yes, again.
Replace filter, and refill oil.
This ought to be enough to satisfy the most obsessive compulsive of the super-clean-crankcase crowd.
I'm -- ahem -- not saying how I know of this procedure, but I'm ahh pretty sure that some people have done this, at least in the distant past. . .
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