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From: Pszemol on 30 Oct 2007 01:04
How much % of engine oil is able to drain through the removed plug?
How close to 100% will it be?

Is it practical to dain&fill the engine twice during the oil change?
From: Justa Lurker on 30 Oct 2007 18:36
Pszemol wrote:

> Is it practical to dain&fill the engine twice during the oil change?

yes but why ? seems wasteful.

From: Daniel on 1 Nov 2007 13:10
Pszemol wrote:
> How much % of engine oil is able to drain through the removed plug?
> How close to 100% will it be?
>
> Is it practical to dain&fill the engine twice during the oil change?
===
Check the Factory Service Manual for "dry fill" capacity, then compare
to drain and fill capacity. I think the difference is something like .
75 US quarts.
If you're going to drain and fill more than once, just drive the car a
while to bring it back up to operating temperature, then drain again.
Would also be OK to go perhaps 500 miles and then drain again. The
fresh detergent additives in the new oil will help clean the engine,
also the repeated drains help clean the oil more completely.
Also helps to drain hot oil over night.
Could also check auto-rx.com.
Also, fully synthetic oil tends to keep the inside of an engine
cleaner.
This is a bit extreme just for cleaning oil, but when I replaced the
oil pan gasket I also cleaned the inside of the pan thoroughly. This
will also result in cleaner oil.
The main thing is regular oil change intervals. Changing the oil a few
times at 500 or 1000 miles can also be helpful.

From: Pszemol on 1 Nov 2007 13:47
"Daniel" <nospampls2002(a)yahoo.com> wrote in message news:1193937044.588063.67010(a)q5g2000prf.googlegroups.com...
> Check the Factory Service Manual for "dry fill" capacity, then compare
> to drain and fill capacity. I think the difference is something like
> .75 US quarts.
> If you're going to drain and fill more than once, just drive the car a
> while to bring it back up to operating temperature, then drain again.
> Would also be OK to go perhaps 500 miles and then drain again.

Sounds reasonable.

One more question:
If I want to use only one oil filter - when should I replace the filter?
During the 1st drain or the 2nd, final drain?

> Also helps to drain hot oil over night.

I do not follow here... Are you suggesting opening the drain plug
when engine is hot and leaving it open over night?

How much more can I gain doing this?

> Could also check auto-rx.com.

Great link - I have it bookmarked - thanks.

> Also, fully synthetic oil tends to keep the inside of an engine
> cleaner.
> This is a bit extreme just for cleaning oil, but when I replaced the
> oil pan gasket I also cleaned the inside of the pan thoroughly. This
> will also result in cleaner oil.

Yes, it sounds quite extreme :-)

From: Pszemol on 1 Nov 2007 13:41
"Justa Lurker" <JustaLurker(a)att.net> wrote in message news:GlOVi.37155$kj1.704(a)bgtnsc04-news.ops.worldnet.att.net...
> Pszemol wrote:
>
>> Is it practical to dain&fill the engine twice during the oil change?
>
> yes but why ? seems wasteful.

So is it practical or wasteful? Make up your mind... ;-)
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