GL Class (X166) 2013-2015 after facelift became GLS (X166)

2013 GL550 oil consumption

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Old May 30, 2023 | 11:30 PM
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PhilippTruv's Avatar
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Mercedes 190e 2.3L 1991 and Mercedes sl320 1997
2013 GL550 oil consumption

Hey guys, I have a 2013 gl550 with 265k km on it so far. Always have done oil changes at the interval stated by Mercedes Canada at 20k km.

recently, within the last 10k km, I’ve been forced to add a liter of oil every 1000km.

no leaks that I could detect coming from the engine.

ive read that early m278 motors had some oil burning issues. Is this what I am seeing? What’s the solution? I’ve read that buying a 2015+ m278 motor is the best as it’s had all the revisions.

any ideas?
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Old Jun 1, 2023 | 02:08 PM
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gl450
thats fairly common
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Old Jun 2, 2023 | 04:49 PM
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From: Gresham, OR
GL450
A liter of oil every 1000km (620 miles) for an engine with 265k km (165k miles) is not unusual at all. I've had many gas engines over that mileage from German, American, and Japanese companies and they all burned/leaked some amount of oil once they got in the 150k to 200k range. You can play around with changing the weight of the oil to possibly reduce consumption, and some people have had success with that on other engines, but it's risky.. A vehicle with 165k miles is something you'll be needing to pop the hood on fairly often anyway to check for coolant/oil leaks and levels, so adding a liter of oil every week or two isn't a big cost in time or money. My 2013 GL450 has 193k km (120k miles), and I go through about a liter about every 1600 km (1000 miles) and I'm not worried. The oil capacity is pretty large for the M278, so even if you're down a liter you're ok for a little bit.
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Old Jun 30, 2023 | 07:11 PM
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2014 GL550; 2010 GL450
Wow! Great to see other share their experience. I thought I was in a unique position and was getting ready to rebuild my engine for this (and other reasons). I go through 1L every 800 to 1000 miles on my 2014 GL 550 with 140k miles. No other car I've owned burned this much oil; not even my x164 GL450 with similar mileage. I've seen a BMW technical info on oil consumption essentially telling dealerships to not undertake repairs on vehicles that consume up to 1L every 600 miles; they should tell the customer that it's normal. I guess these rigs do eat oil for snack.
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Old Jul 2, 2023 | 06:59 AM
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2014 GL450, 1992 W140 300SD, 1993 W140 300SE, 1987 E30 Convertible
It is not always due to engine wear. Replace plastic cover on centrifuge vent separator, seal could be leaking letting extra oil ventilated into intake.
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Old Jul 2, 2023 | 09:15 AM
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2014 GL550; 2010 GL450
I replaced the centrifuge cover, gasket and the centrifuge itself when I had the cam shaft out. It didn't help my high oil consumption problem.
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Old Jul 4, 2023 | 07:08 PM
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gl550
yes the monster of mobile does drink the oil at (in my experience) 2 quarts/5000 miles.
Do NOT wait 10k for a synthetic change. Change every 5K and chalk it up to this vehicle is just a dud.
I have never had any vehicle fail on so many levels (fuel lines/brake lines/compressor/air matic system/door sensors ESP all the time.)
It is the monster of Mobile for a reason.
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Old Jul 5, 2023 | 10:33 PM
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2014 GL450, 1992 W140 300SD, 1993 W140 300SE, 1987 E30 Convertible
I have no oil consumption other than normal and whatever drip around, but my engine been rebuild
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Old Aug 13, 2023 | 03:32 PM
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Originally Posted by tadiguy
Wow! Great to see other share their experience. I thought I was in a unique position and was getting ready to rebuild my engine for this (and other reasons). I go through 1L every 800 to 1000 miles on my 2014 GL 550 with 140k miles. No other car I've owned burned this much oil; not even my x164 GL450 with similar mileage. I've seen a BMW technical info on oil consumption essentially telling dealerships to not undertake repairs on vehicles that consume up to 1L every 600 miles; they should tell the customer that it's normal. I guess these rigs do eat oil for snack.
It should not burn that much oil, not even close to that. None of my cars (BMW Z3, W124 diesel, W123 diesel, X166 diesel, LS460) burn over 1/2Q between 5,000 mile oil changes. Most don’t burn 1/4Q in between oil changes. Even the 2002 ML320 with 300,000 miles on it only burns 2 quart in 5,000 miles & it smokes on cold startup plus I use it HARD (huge tow loads for hours at the time). Modern engines should not burn but a touch of oil. My neighbor runs a delivery service and has several Chevy 2500’s with 400-600 thousand miles on them and they might use a quart over his 7,500 mile oil change intervals.

Be wary if that one my friend.
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