Does anyone do this during an oil change?

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Originally Posted By: HTSS_TR
No, never did and never will. But I tried this and get few more oz of dirty oil: blow air with a hair drier into the fill hole for a minute or 2.
Why not an air compressor? Surely it would put more air in there...lol. the thing I'd be concerned with, is completely removing that "film" of oil along the moving parts....
 
I don't think there would be any flushing of the engine by adding one qt. of oil. I could see that if you were concerned about the small amt. of old oil that doesn't drain out and collects in the bottom of the crankcase. I would think pouring a 1/2 qt. of oil in would get this old oil out and replace it with fresh, clean oil. As someone above mentioned, try to jack the car up so it it slightly leaning toward the drain plug side. Do this safely, of course. Always use jack stands or ramps. This helps reduce the amt. of the old oil that doesn't drain out.
 
I flushed 5 quarts through an engine.... once. I have always put the drain plug in first since that happened.
 
Originally Posted By: Errtt
I flushed 5 quarts through an engine.... once. I have always put the drain plug in first since that happened.


Yeah, me too. Worked at at a garage and two of us were doing an oil change. When we discovered the fresh "flush oil" on the garage floor, I seem to remember we looked at each other and both said at the same time "I thought you got the drain plug...".
 
Originally Posted By: Errtt
I flushed 5 quarts through an engine.... once. I have always put the drain plug in first since that happened.


ROFL!
By the grace of God, I've never doen this, but it could easily happen.
 
Originally Posted By: HTSS_TR
5 quarts of oil on the garage floor is not that bad, 5 quarts of oil on the street about 5 blocks from the house is worse.


5 quarts on the garage floor might not seem like much until:
a. Pour in the 5-quarts.
b. Turn around, wash hands in the utility sink.
c. Step to the right, go into the house.
d. Sit on couch, tell wife (in the kitchen) "I'm hungry!"
e. Watch a little TV while she fixes something to eat.
f. Wait for that lunch - this is key for 5 quarts to grow.
g. Wait some more.
h. Lunch almost ready, so she goes to the hall pantry to get paper plates, easily discovers pronounced foot prints. Yup - Sherlock tracked them from he garage door, down the hall, into the living room. Besides the dogs, I had to be the only one in the living room, watching TV. She had "That Look", the one that's always bad and dangerous.

Note: Spilled oil likes to spread, give it time. One might think its only 5 quarts, but the one cleaning up will never believe it.

Doing it away from the house and away from the wife, not good, but not always as bad as you might think.

add - I got real hungry cleaning up. The carpet came clean but it wasn't as bad as it sounds. It was lightened up by the time I made it to the living room. Bissell Pro Heat carpet cleaner (not sure on spelling) was my 1st experience seeing it in action.
It really takes a long time cleaning spread out oil. For weeks it was lingering and oozing out from under the workbench, shelving, washer & dryer etc.
 
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Naw,man. Drains and filters catch the worst stuff. The rest is N/A to the life of your engine.
 
Drain oil.
Put drain plug back in.
Refill engine.
Start engine.
Run for a bit.
Shut off engine.
Perform full oil change.
I do this all the time on customer's cars with really nasty oil.
The oil count is just a suggestion, right?
 
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Actually I run a half quart through, does seem to clear up the old oil on the bottom of the pan, I use the cheapest oil I can find for that half quart though. Basically agree that it is a waste of resources though.
 
Originally Posted By: Errtt
Originally Posted By: HTSS_TR
5 quarts of oil on the garage floor is not that bad, 5 quarts of oil on the street about 5 blocks from the house is worse.


5 quarts on the garage floor might not seem like much until:
a. Pour in the 5-quarts.
b. Turn around, wash hands in the utility sink.
c. Step to the right, go into the house.
d. Sit on couch, tell wife (in the kitchen) "I'm hungry!"
e. Watch a little TV while she fixes something to eat.
f. Wait for that lunch - this is key for 5 quarts to grow.
g. Wait some more.
h. Lunch almost ready, so she goes to the hall pantry to get paper plates, easily discovers pronounced foot prints. Yup - Sherlock tracked them from he garage door, down the hall, into the living room. Besides the dogs, I had to be the only one in the living room, watching TV. She had "That Look", the one that's always bad and dangerous.

Note: Spilled oil likes to spread, give it time. One might think its only 5 quarts, but the one cleaning up will never believe it.

Doing it away from the house and away from the wife, not good, but not always as bad as you might think.

add - I got real hungry cleaning up. The carpet came clean but it wasn't as bad as it sounds. It was lightened up by the time I made it to the living room. Bissell Pro Heat carpet cleaner (not sure on spelling) was my 1st experience seeing it in action.
It really takes a long time cleaning spread out oil. For weeks it was lingering and oozing out from under the workbench, shelving, washer & dryer etc.


Now THAT'S COMEDY!
wink.gif


Step f. actually made me snort!
grin.gif
 
I have two cars, one " old-'99 Saturn" and a 2009 Sonata. When doing a oil change on the Sonata, i change the oil and afterwards fill up with Pennzoil Conventional 5w30. Now let the engine run for 20 min and drain the oil. I was amazed how dirty the oil was!

Now I fill up with a good synthetic oil for Sonata. The 'flushed' Pennzoil conventional I use in my Saturn when it needs a oil change.
The oil stay clean MUCH longer in the Sonata this way!

This method works like a charm for me.
 
I assume you are mainly focusing on the color of the old oil. Just because it is dark or even black doesn't mean it is very dirty.

Folks will do what they want but in the end you are just wasting time, energy, and money doing that "flush" routine.
 
I've done this but with the drain plug closed, and NOT a full quart.

I tried it once when the angle of the drain plug was not the right angle to fully drain in my view... It helped get some more of the slug of used oil out...

But usually? Nope.
 
Originally Posted By: Slick17601
That's called the "Patman flush". He used to do that with a couple quarts of oil.


Yep, on a couple of the cars that I switched over to GC, I would put in two quarts of fresh oil, close the drain plug, and idle the engine for 30 seconds, then drain that oil too. The purpose of this was to get a little bit closer to having 100% GC in the engine, as opposed to still having half a quart to a quart of the old oil lurking around. And yes, it was a huge waste of oil! (I haven't done that method for years)
 
if I just bought a use car, and no know of preview history, first oil change I alway pour half quart of new oil after old oil has drain, that is only time. and cut down the OCI for first oil change.
 
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