Letting Oil Drain Overnight

Drain plugs are put on the bottom of the oil pan for a reason. Just as the dipstick tube is placed at the top of the engine. Both are designed so gravity works in your favor.

Why would you spend $100.00+ on a machine that has to fight it in order to work at all?
Because on a car with the filter on top this makes it so one never has to get on the ground.
 
Because on a car with the filter on top this makes it so one never has to get on the ground.
This. Plus I don't have to change out of my Brioni tux when I need a quickie oil change.

All of my current stable is VW and has filters on top. Extraction is super easy to accomplish a complete oil and filter change in about 2 beers worth of time. Incidentally, whenever I get a new (to me also) car, I use the extractor then open the drain plug to see how much comes out afterwards. Only 3 of the numerous cars I've done this method with over the almost 20 years of using an extractor has produced ANY oil. And then, only enough to just cover the bottom of a Solo cup. NOT going to worry about this vs. getting under a hot car, dealing with scalding myself with hot fluids/touching hot parts, trying to unfold myself from some variation of the fetal position and standing up, transferring a huge awkward pan of oil into another container for recycling, or the absolute worst; trying to drink my beer while lying down.

Oh, and all my cars go on the Quick Jack every 5K or so to get tire rotation. Thats when I do my undercar inspections for those who have said extraction keeps you from doing that. While its cold. Still have to figure out the beer thing though.
 
This. Plus I don't have to change out of my Brioni tux when I need a quickie oil change.

All of my current stable is VW and has filters on top. Extraction is super easy to accomplish a complete oil and filter change in about 2 beers worth of time. Incidentally, whenever I get a new (to me also) car, I use the extractor then open the drain plug to see how much comes out afterwards. Only 3 of the numerous cars I've done this method with over the almost 20 years of using an extractor has produced ANY oil. And then, only enough to just cover the bottom of a Solo cup. NOT going to worry about this vs. getting under a hot car, dealing with scalding myself with hot fluids/touching hot parts, trying to unfold myself from some variation of the fetal position and standing up, transferring a huge awkward pan of oil into another container for recycling, or the absolute worst; trying to drink my beer while lying down.

Oh, and all my cars go on the Quick Jack every 5K or so to get tire rotation. Thats when I do my undercar inspections for those who have said extraction keeps you from doing that. While its cold. Still have to figure out the beer thing though.
I've tried the extractor, and pulling the drain plug gets more oil out, in all three of my vehicles. An extractor leaves me with a few questions. For example in this post people are concerned with getting as much oil out as possible, draining oil overnight so they can get every possible drop out. Oil can take several hours to drain from high places in the engine and get to the pan. Two beers and an extractor isn't getting that oil out. I've extracted oil, couldn't get another drop in the extractor, then I pulled the drain plug and got more oil out, leaving it out for half an hour. That might have put me to beer #3, etc, the longer I let it drip. Granted I didn't get much oil, only a couple of ounces at most but for the purpose of this thread the extractor imo falls short.

Having said that how much longer will an engine last allowing oil to drain into a collection pan overnight? My bet, not much with sane OCIs. I recall reading about people starting their engine with the drain plug out to try and get more oil out, others pouring fresh clean oil through the engine to do some extra cleaning on the way down to the pan. No comment on either of those practices. At some point the OCD has to stop.

Regarding the extractor it is a great tool, and on certain vehicles an asset for changing oil. My drain plugs are easy to access, and two of my three vehicles I have to get under to get the filter. So it sits in a box until I do a transmission service, or something else requiring it. It earns it's keep pre-draining ATF making pan drops much easier.
 
I've tried the extractor, and pulling the drain plug gets more oil out, in all three of my vehicles. An extractor leaves me with a few questions. For example in this post people are concerned with getting as much oil out as possible, draining oil overnight so they can get every possible drop out. Oil can take several hours to drain from high places in the engine and get to the pan. Two beers and an extractor isn't getting that oil out. I've extracted oil, couldn't get another drop in the extractor, then I pulled the drain plug and got more oil out, leaving it out for half an hour. That might have put me to beer #3, etc, the longer I let it drip. Granted I didn't get much oil, only a couple of ounces at most but for the purpose of this thread the extractor imo falls short.

Having said that how much longer will an engine last allowing oil to drain into a collection pan overnight? My bet, not much with sane OCIs. I recall reading about people starting their engine with the drain plug out to try and get more oil out, others pouring fresh clean oil through the engine to do some extra cleaning on the way down to the pan. No comment on either of those practices. At some point the OCD has to stop.

Regarding the extractor it is a great tool, and on certain vehicles an asset for changing oil. My drain plugs are easy to access, and two of my three vehicles I have to get under to get the filter. So it sits in a box until I do a transmission service, or something else requiring it. It earns it's keep pre-draining ATF making pan drops much easier.
Agree! The only time I used an extractor was with my boats with inboard engines. The only way to get ANY oil out.

When I change oil I want everything that settles in the bottom of the pan to come out of the bottom of the pan.

:);):rolleyes:
 
This. Plus I don't have to change out of my Brioni tux when I need a quickie oil change.

All of my current stable is VW and has filters on top. Extraction is super easy to accomplish a complete oil and filter change in about 2 beers worth of time. Incidentally, whenever I get a new (to me also) car, I use the extractor then open the drain plug to see how much comes out afterwards. Only 3 of the numerous cars I've done this method with over the almost 20 years of using an extractor has produced ANY oil. And then, only enough to just cover the bottom of a Solo cup. NOT going to worry about this vs. getting under a hot car, dealing with scalding myself with hot fluids/touching hot parts, trying to unfold myself from some variation of the fetal position and standing up, transferring a huge awkward pan of oil into another container for recycling, or the absolute worst; trying to drink my beer while lying down.

Oh, and all my cars go on the Quick Jack every 5K or so to get tire rotation. Thats when I do my undercar inspections for those who have said extraction keeps you from doing that. While its cold. Still have to figure out the beer thing though.
All of my current stable is GM with the filters on the bottom and I don't use my extractor on anything except the transmission, so our methods are quite different. But what I want you to know sir, is that I got a great morning laugh from your post and loved reading it. Of course, despite the humor, you are correct about what you say regarding being in awkward positions under the car. Thanks for the humor and I hope you have a great Holiday sir. :) :)
 
Moreover, the risk far outweighs any perceived reward. What if you need the vehicle in the middle of the night because of an emergency? Gotta finish an oil change at 2am while your spouse sets there with a broken arm before you head to the hospital to get it looked at. That sounds like fun.
That sounds like a recipe for a divorce.....dog house/couch if you're lucky.
 
This stuff is pretty decent actually for just a basic light beer.
How would you know?? Stop lying to these people. Let's analyze this.

White Jetta....check.
Roof rack....check.
Liqui Moly products....check.

You KNOW you're a mimosa and cosmopolitan type of guy.

You're a Gucci purse away from being a basic white gi....lemme stop.
 
How would you know?? Stop lying to these people. Let's analyze this.

White Jetta....check.
Roof rack....check.
Liqui Moly products....check.

You KNOW you're a mimosa and cosmopolitan type of guy.

You're a Gucci purse away from being a basic white gi....lemme stop.
What Jetta?
 
I think it’s more a suspension issue. As you say, the contaminants have all settled to the bottom, so they are on the bottom of the pan. They may or may not slowly move over to the drain, especially when cold. A recently run engine most likely has the contaminants actively suspended, & the faster drainage will sweep more crap out.
I don’t think detergents lose suspension properties at ambient temperature. If contaminates are in the oil then that is where they stay. If the oil comes out with it so do the contaminates. The faster drain is the only part I see as valid.
 
I let mine drain for at least a week. Seriously….why not figure out a way to flip the car over and get every last drop out

You could remove the oil retention valves in the head(s). Then you won't have to turn the car over. ;)

Only a week?🤣🤣

Be like the honorable @AEHaas and state he has Ferraris making "horrible mechanical noises for a few seconds" because he disassembled the oil pump part of the motor to get every last drop out to run his latest experiments. Yes, he made reference to essentially a "dry start" once, something about somehow removing every last drop of oil from a Ferrari engine, I forget which one, but, hey. Cool. Anything else is amateur hour...

This is why here is sometimes called an "Exercise in OCD" ... Most shops I know of will let the oil drain and remove the filter, sometimes at a medium pace depends on workload I imagine, then reinstall filter then put drain plug(s, some have multiple) on last THEN refill THEN start motor for a few seconds (?) THEN check the level before they send you on your way.

You're always going to have (a small amount of) residual oil in the engine .

I now have a Fumoto valve and 8000+ miles on my oil. Not sure when I will actually change my oil...
Get to disassembling and Happy Memorial Day Weekend 🇺🇸
 
Only a week?🤣🤣

Be like the honorable @AEHaas and state he has Ferraris making "horrible mechanical noises for a few seconds" because he disassembled the oil pump part of the motor to get every last drop out to run his latest experiments. Yes, he made reference to essentially a "dry start" once, something about somehow removing every last drop of oil from a Ferrari engine, I forget which one, but, hey. Cool. Anything else is amateur hour...

Yes, he makes sure to let us know that this Ferrari or that Ferrari or his wife’s Lamborghini…. We get it, you’re rich
 
Drain plugs are put on the bottom of the oil pan for a reason. Just as the dipstick tube is placed at the top of the engine. Both are designed so gravity works in your favor.

Why would you spend $100.00+ on a machine that has to fight it in order to work at all?
You might be surprised at how well extractors work. Not on all engines, but if an engine is a good fit, the speed of service and ease of use makes the MityVac a great tool.

That's my experience and I used to be the biggest naysayer. I love my MityVac.
 
Extractors have been shown to be just fine to use and the fear of "leaving some oil in", at least on the MK7 VWs, isn't founded. Lots of videos showing it with testing of the volume remaining....it's not enough to bother worryinng about.
 
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