I added a little too much oil on the last change...
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Joined: Aug 2018
Posts: 90
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From: Arizona
2007 GL 450 (former) and 2012 E550 Coupe
I added a little too much oil on the last change...
It's an E550 Coupe, so it uses 9L of oil normally. I actually put in around 10L. The dip-stick has oil to just above the end of the plastic tip - just touching the braided wire portion.
Is that going to be a problem where I should extract some, or is that not enough to really matter?
Is that going to be a problem where I should extract some, or is that not enough to really matter?
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Joined: Aug 2023
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From: MA Coast
W204 2010 C300 4matic Sport M272
I would extract some oil until it is showing at the proper fill level.
My W204 manual says to fill it so its in the middle of the Min-Max and there happens to be a dot on the dipstick there. I used to fill it to the Max mark until I read the manual where it says from min-max is 2 quarts, so filled to the max line is technically 1 quart over filled. Thats at least how I look at it.
Just search "oil over filled in engine", plenty of reasons not to do it.
My W204 manual says to fill it so its in the middle of the Min-Max and there happens to be a dot on the dipstick there. I used to fill it to the Max mark until I read the manual where it says from min-max is 2 quarts, so filled to the max line is technically 1 quart over filled. Thats at least how I look at it.
Just search "oil over filled in engine", plenty of reasons not to do it.
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From: Pepper Pike Ohio
24 GLS580 '23 E450 4matic 12 E350 4Matic
It's an E550 Coupe, so it uses 9L of oil normally. I actually put in around 10L. The dip-stick has oil to just above the end of the plastic tip - just touching the braided wire portion.
Is that going to be a problem where I should extract some, or is that not enough to really matter?
Is that going to be a problem where I should extract some, or is that not enough to really matter?
Joined: Nov 2016
Posts: 7,847
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From: Maryland
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
You can use a cheap 12V fluid pump or get a Mityvac or equivalent extractor, but definitely do not over fill.
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Joined: Nov 2016
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From: Maryland
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Actually, the problem with overfilling is that if the sump/oil pan is too full and the crankshaft or piston rods contact the oil, they can froth the oil into a foam, reducing oil pressure and the ability to lubricate necessary parts. That includes causing insufficient oil (oil starvation) to the pistons, cylinders, and turbo shaft. In other words, you can destroy your engine with too much oil. However, going over the top marker on the dipstick a little is unlikely to be considered dangerous overfilling.
Thread Starter
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Joined: Aug 2018
Posts: 90
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From: Arizona
2007 GL 450 (former) and 2012 E550 Coupe
Actually, the problem with overfilling is that if the sump/oil pan is too full and the crankshaft or piston rods contact the oil, they can froth the oil into a foam, reducing oil pressure and the ability to lubricate necessary parts. That includes causing insufficient oil (oil starvation) to the pistons, cylinders, and turbo shaft. In other words, you can destroy your engine with too much oil. However, going over the top marker on the dipstick a little is unlikely to be considered dangerous overfilling.
Hardly apples to apples and a poor use-case for a car that will actually be driven with over-filled oil.
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From: US
2008 E350, 2012 ML350, 2014 E350, 2015 ML350
Good info - thanks!
Yeah, I've seen that one - but we're talking about a high-performance bi-turbo V8... that's a Lada engine; lol. Further, he runs it like that for a minute each time.
Hardly apples to apples and a poor use-case for a car that will actually be driven with over-filled oil.
Yeah, I've seen that one - but we're talking about a high-performance bi-turbo V8... that's a Lada engine; lol. Further, he runs it like that for a minute each time.
Hardly apples to apples and a poor use-case for a car that will actually be driven with over-filled oil.
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Member
Joined: Aug 2018
Posts: 90
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From: Arizona
2007 GL 450 (former) and 2012 E550 Coupe
I don't disagree about the fundamentals from the video, but what he shows is simply what happens when you overfill it with oil and run it for a few minutes at a time... not when you put a load on it and drive it down the highway for an hour in stop-and-go traffic. They physics and dynamics are going to be very different, I'd think.
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2008 E350, 2012 ML350, 2014 E350, 2015 ML350
The point is the crankshaft is effectively blending the oil, and creating foam. As long as the foam NEVER comes into contact with the oil pump pick up tube everything will be fine since the oil pump will ALWAYS see pure liquid oil.
Once the foam makes it into the pump, the pump can no longer raise the pressure as designed since the "fluid is compressible". If the pump fails to raise pressure, the flow of oil within the conduits is compromised, the bearings can starve and the rest is history.
That is the whole point of the video. Everything else what anyone in a laboratory will do: cover the maximum range of the variables being studied to archive full set of results.
Once the foam makes it into the pump, the pump can no longer raise the pressure as designed since the "fluid is compressible". If the pump fails to raise pressure, the flow of oil within the conduits is compromised, the bearings can starve and the rest is history.
That is the whole point of the video. Everything else what anyone in a laboratory will do: cover the maximum range of the variables being studied to archive full set of results.
