what is the best way to get all old old out?

[LordAbbett]

Remove drain plug. When the stream of oil slows to a drip replace the plug. ( while waiting either munch on some crackers or preferably use a clean to wipe the plug and the seat clean)
The oil was doing a perfectly good job of lubricating right up until you did the OC.

 

[shpankey]

Some cars, like mine, by holding the gas pedal to the floor when cranking, will automatically disable the injectors.

 

[MBDiagMan]

I did not read all posts in this lengthy thread, but I am sure there are many who scoff at wanting a squeaky clean crankcase and internals.

I'm an old codger who drove lots of miles in the days of [censored] oils and engines that were good for 100,000 miles if taken care of. Since I began driving in 1963 I have always performed my oil changes the same way although it is probably serious overkill with todays oils and engines.

I like to drain oil on a Friday night. I come home and go straight in the house to change into work clothes and back to the shop as soon as possible. I go back out and pull the drain plug and oil filter and then let it drain OVERNIGHT. This drains the oil out while the contaminants are churned up in the oil rather than stuck to the internals. The oil is thinner, so it drains out better. The overnight part allows as many drops of gunk to come out of the pan as will come out.

On some cars over the years I have found various angles for best drain of those last few CC's. Most cars over the years drained best if the back wheels are lower than the front. Todays cars have many oil pan arrangements with the plug on the side. You just have to figure out what is the best angle for the most complete drain for your vehicle.

I have no way to prove that my methods have added miles to my engines, but I'm quite sure that they haven't hurt anything. My highest mileage car was a 1984 Mercedes that went 534,000 miles with this method. I have driven many other cars multiple hundreds of thousands of miles.

An added benefit to my method is due to the fact that I do ALL my own car work. When it comes time to open up an engine, it is gratifying to see CLEANLINESS with no sludge anywhere.

My $0.02,
Doc

 

[demarpaint]

I've let oil drain overnight, I don't know why I stopped. Next OC on my Jeep & E-150 I'm going to start letting it drain overnight. I won't bother doing that with the beater, an hour with the plug out is plenty. In the scope of things it probably doesn't make any difference at all, it is more of a feel good thing than anything else. JMO

 

[gfh77665]

I split the difference in the two philosophies. Instead of immediate refilling, or, draining overnight, I drain fully warmed engine, take an hour break to eat lunch, surf the web, watch TV, etc., then refill.

The one hour drain definitely gets more out than a fast refill, and probably almost as much as overnight drain.

 

[Gary Allan]

In one former thread on this topic, one member recommended the 4 point rotational jacking of the car while warm to assure that any oil that could be coaxed into leaving the engine would have the opportunity. He also recommended a beer between each jacking evolution.

 

[demarpaint]

Originally Posted By: gfh77665
I split the difference in the two philosophies. Instead of immediate refilling, or, draining overnight, I drain fully warmed engine, take an hour break to eat lunch, surf the web, watch TV, etc., then refill.

The one hour drain definitely gets more out than a fast refill, and probably almost as much as overnight drain.


That is what I do mostly now. I'll eat, or do some yard work after I checked tires etc. But since my Jeep sits in the garage I could put it up on ramps after a drive and let it drain over night. It would be interesting to let it drain for an hour, then put a seperate container to collect and measure how much more comes out after an overnight drain.

 

[SLCraig]

I just drain, let it drip for a while, (10 mins) re-fill.

I'm sure this is more than a lot of ppl do!

Plus, most people here don't push the envelope like 10k on dino, so who cares if a few teaspoons of (probably decent oil still) is left in the engine during a change..

 

[otis24]

I typically drain until oil is at a slow drip. Re-install drain plug. Remove old filter. Clean filter area and put on new filter. Remove drain plug and allow oil to drain until a very slow drip. Re-install drain plug and fill crank case.

 

[gfh77665]

Originally Posted By: demarpaint
It would be interesting to let it drain for an hour, then put a seperate container to collect and measure how much more comes out after an overnight drain.


I have wondered that, too. My guess is that it is about 1 oz., or less. After one hour, you have to wait if you want to see a single drop fall out. Remember the engine is cooling off rapidly past that first hour, so that might indicate very slow dripping if at all.

One hour is the most efficient time, IMO.

 

[demarpaint]

Originally Posted By: gfh77665
Originally Posted By: demarpaint
It would be interesting to let it drain for an hour, then put a seperate container to collect and measure how much more comes out after an overnight drain.


I have wondered that, too. My guess is that it is about 1 oz., or less. After one hour, you have to wait if you want to see a single drop fall out. Remember the engine is cooling off rapidly past that first hour, so that might indicate very slow dripping if at all.

One hour is the most efficient time, IMO.


My reason for considering this would determine if these over night drains, mean anything. Next OC on my Jeep I'm going to do it, if I remember. LOL

 

[gfh77665]

Do it and let us know! Betcha' its <1 oz., after an hour. Interesting...