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Old 01-11-2010, 10:53 AM
benhogan's Avatar
Join Date: Aug 2009
Location: Chapel Hill
Posts: 1,088
Do you always drain 8 quarts?

I changed the oil yesterday after driving the car for a couple of hours. I let it drain for 4 hours with the oil filter cannister cracked open.

Granted, that it was 36 degrees and the oil on the dipstick was at the mid point, I was only able to drain 6 or so quarts.

It's a little disturbing. How much oil does it take from the mid point to the full point on the dipstick? Has anyone ever measured it?

I guess the used oil filter itself 'holds' a quart?

1987 190d 2.5Turbo
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Old 01-11-2010, 10:54 AM
Registered User
Join Date: Oct 2005
Posts: 4,263
Remove the oil filer before draining or evacuating the oil.

Since I only ever put in 7.5 quarts, I don't ever get 8 quarts out of my 606.
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Old 01-11-2010, 11:04 AM
Posts: n/a
I think you will be fine as long as you changed the filter. And yes the filter holds quite a bit of oil.
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Old 01-11-2010, 11:06 AM
Crazy_Nate's Avatar
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Join Date: Jan 2008
Location: Hampton Roads
Posts: 567
I've always warmed up the car sufficiently and removed the filter before changing the oil. Never had a problem getting the proper amount out
1982 240D, sold 9/17/2008
1987 300D Turbo
W124.133 - 603.960, 722.317 - Smoke Silver Metallic / Medium Red (702/177), acquired 8/15/2009
262,715 and counting
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Old 01-11-2010, 11:14 AM
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Location: Lexington, NC or Boone, NC
Posts: 2,272
For an originally filled 8 quarts, I'll drain anywhere from 6 to 7.5 depending on how much leaked/burned over the course of the interval and how recently it got low enough to merit adding a quart.

I always pull the drain plug out first, then while it's still dribbling out, open the filter housing and let that drain for a little while; both keep dripping while i'm jacking the car up to do the tire rotation. I jack the right front up last so that gravity will let the last little dribbles leave the oil pan. I go on and rotate the tires, then change the filter, then finally it's quit dripping by then so I put the drain plug back and refill with 8 quarts. When I do it all in that order it probably doesn't get me more than two tablespoons that I wouldn't have gotten without all that thought and planning, but it just makes me feel good.

They're older engines. Unless you've poured thousands into a rebuild and replacement operation, they're going to burn/leak some. The filter doesn't hold ALL that much -- I don't know an amount but it can't just be incredible... but the oil cooler and the lines going to and from it DO hold enough to not get the full 8 back.

This is all on my 603.

"What could possibly go wrong?"

~Michael S.~ -
1986 M-B 300SDL, retired due to rust and electrical problems. Donated engine to:
1987 M-B 300SDL, odo dead. New project.
1982 M-B 240D, odo stopped at 308,000
1982 M-B 300SD, 175,000
1989 Dodge Ramcharger, 87,000 - 4wd, 318
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Old 01-11-2010, 12:01 PM
Posts: n/a
I have found that I actually get more out with a "topsider" pump than by draining. For best results I pump it down while hot and remove the old filter first. It seems to accept about 0.5 quart more when I refill it, compared to draining. Is there a significant "dead spot" in the bottom of the oil pan on the 617?
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Old 01-11-2010, 12:17 PM
vstech's Avatar
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,353
the 617 pan is flat as far as I can see. having the drain in the front is a bit annoying, as most like to jack up the car to drain the oil, thus having a section of the pan not allowing oil out... I can't say, I've ever measured the amount of oil I pulled out... just what I put back in, 7.5 is what goes back in on mine. that oil cooler holds quite a bit of oil and the lines are not small.
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
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1987 190D 2.5Turbo
1987 190D 2.5Turbo
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Old 01-11-2010, 01:06 PM
snookwhaler's Avatar
Join Date: Feb 2009
Location: Treasure Coast, FL
Posts: 1,417
I never actually measured how much comes out. I'll check it next time. When I fill it, it takes exactly 7.75 qts. to get to the top mark on the dipstick. Over the course of 5,000 miles it drops down to just below the full mark.

I always run the passengers side tire up onto a piece of 2x8 in an attempt to get as much as possible out of the pan. I'm not sure if it does any good? But, it makes me feel better... So, I do it. Then I pop the canister loose and then pull the plug.

I'm not a "wait around" kind of guy either. As soon as the stream turns to a drip, I put the plug back in, R2 the filter and filler back up.

1985 300D (SOLD)

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Old 01-11-2010, 02:15 PM
Biodiesel300TD's Avatar
Join Date: Dec 2004
Location: Albany, OR
Posts: 4,845
You'll never get the entire volume of oil out. The injection pump holds a fair amount of oil, that doesn't drain out unless you take the pump off.
'04 Jetta TDI Wagon
'82 300TD ~ Winnie ~ Sold
'77 300D ~ Sold
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Old 01-11-2010, 09:29 PM
Join Date: Jul 2001
Location: Old Lyme, Connecticut
Posts: 3,596
When you put in 8 quarts or 7.5 quarts, depending on what the manual requires, the presumption is that you need that much oil in addition to all the oil in the oil cooler lines and the injection pump to keep the oil level correct. The only time you have to fill and account for these volumes is the very first time oil is put in to the engine, ever. Well, unless you have a 1975 240D with an oil cooler. Those had a drain plug on the bottom and you drained the cooler when you changed oil. Haven't seen one of those for quite a while though.

As for 6 quarts coming out, don't sweat it. Fill it to the dipstick level mark and go. If not all came out, change your tactic next time. I remove the filter and then use my Topsider to suck the oil out of the dipstick tube. I definitely get a bit more out of my W210 Turbo than 6 quarts, but not as much as 7 as I only change oil when the "add oil" warning takes over my dash instruments and have never added oil between oil changes (~8 k miles using Delvac 1). At that point the level is close to the lower mark on the dipstick. But dipstick measurements depend on how level the car is, and my driveway is not level.

So, don't get too worried about measurements that are not that precise. Jim

1986 Euro 190E 2.3-16 (291,000 miles),
1998 E300D TurboDiesel, 231,000 miles -purchased with 45,000,
1988 300E 5-speed 252,000 miles,
1983 240D 4-speed, purchased w/136,000, now with 222,000 miles.
2009 ML320CDI Bluetec, 89,000 miles

1971 220D (250,000 miles plus, sold to father-in-law),
1975 240D (245,000 miles - died of body rot),
1991 350SD (176,560 miles, weakest Benz I have owned),
1999 C230 Sport (45,400 miles),
1982 240D (321,000 miles, put to sleep)
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