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      04-22-2014, 02:03 PM   #1
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Oil consumption

First of all, I apologise in advance for posting this as I know its been covered a lot!

Has anyone ever got anywhere with BMW on this topic (particularly in the UK), I've got an approved used M5 so I have no idea how it was run in, but its at 30k miles and appears to be gulping a litre of oil every 1000 miles (consistently prompting me every 1k miles over the last 3k miles). To confirm I drive the car very gently while cold, generally no more than 2k RPM. someone posted in another thread on the subject that driving the car too gently can have adverse effects on oil consumption - any truth in this I use the full rev range when i can once the car is warm.

I'll also point out that the car drives flawlessly and there is no visible smoke or oil leaks.

Interestingly Nick Trott at Evo Magazine is running an M6 Gran Coupe, this month he has asked for information from M5/6 drivers on their oil consumption, as he is concerned about his long term test M6 oil consumption, he has had to fill 4 litres over 7500 miles - he's doing better than me! subject to how this thread turns out I will email it over to him for an up to date view on the situation.

Are there many other owners out there using 1 litre per 1k miles like me or worse, just trying to decide whether its worth talking to BMW - I've got a feeling they'll just fob me off with "its within their limits"

Any experience or advice appreciated guys - thanks in advance.
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      04-22-2014, 03:00 PM   #2
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4.5k miles in total.....system shows full oil level.

Car only used at weekends though....150 miles max.
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      04-22-2014, 03:51 PM   #3
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M6 GC in uk. Owned from new in sep 2013. 11k miles. Used 2L oil.
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      04-22-2014, 04:08 PM   #4
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The oil usage varies widely. There was one guy here who was having to fill oil at 1 liter per 800 miles, and after escalating to BMW he was told that this is normal - WTF!

I have owned two F10 M5s and my oil usage was one liter per 18,000 miles (no typo). This is prorated usage because I changed my oil before 18,000 miles but measured the oil before changes and also oil removed. Point is never had to add oil, two M5s in a row. I attribute my lack of oil usage to Alpine driving (I.e. Spending first 1200 miles on windy country roads, not taking highways, and observing break in rules). This said I know many of huge oil burners claim they did the same thing so maybe it doesn't make a difference.
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      04-22-2014, 04:11 PM   #5
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Just over 7k and haven't used any. I DD it
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      04-22-2014, 04:19 PM   #6
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Had my M5 new since January 2014. The fill with 1 litre of oil warning appeared at around 4200 miles for first time. In theory I had run-in oil change at 1200 miles, so doing 3000 miles per litre assuming this continues. I would like to think that oil consumption will reduce as the new engine beds-in and thing loosen up!
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      04-22-2014, 07:50 PM   #7
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I am at 6,000 miles and drive the car very aggressively after the engine is warmed up and have added 0 oil and not had the oil level change at all when checked . I seated the piston rings straight of the lot at 4 miles once the engine was to operating temp .
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      04-22-2014, 11:41 PM   #8
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Hmm, so it looks like I'm definitely at the lowest end of the spectrum, it's just frustrating that there is so much variance in this and that BMW set such an artificially low threshold for what's acceptable.
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      04-23-2014, 06:47 AM   #9
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Quote:
Originally Posted by M5 RAG
Hmm, so it looks like I'm definitely at the lowest end of the spectrum, it's just frustrating that there is so much variance in this and that BMW set such an artificially low threshold for what's acceptable.
Did you lease or purchase?
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      04-23-2014, 11:25 AM   #10
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Quote:
Originally Posted by Mbdurham17 View Post
Did you lease or purchase?
Purchased, so won't have the same leverage as you could with a lease.

I'll get BMW to take a look at it but i think I know what their response will be!

I was kind of hoping there would be more of you with the same sort of consumption as mine but it appears i'm at the lowest end of the usage spectrum!
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      04-23-2014, 03:21 PM   #11
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I was at the same level as you. 600 to 800 miles to a litre of oil. I had the oil changed out and am running 10w60 race oil. Since the oil and filter change I have now covered 390 miles and there is no sign of oil consumption on the display.
Additionally my car was averaging 16.4mpg per day. In weird like that I reset it every morning. It is now sitting at 19.3 mpg per day. This is not the same every day as my routes differ but on average I am 2mpg better than before.

I will keep monitoring this and report back.
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      04-23-2014, 03:29 PM   #12
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Quote:
Originally Posted by smithy23 View Post
I was at the same level as you. 600 to 800 miles to a litre of oil. I had the oil changed out and am running 10w60 race oil. Since the oil and filter change I have now covered 390 miles and there is no sign of oil consumption on the display.
Additionally my car was averaging 16.4mpg per day. In weird like that I reset it every morning. It is now sitting at 19.3 mpg per day. This is not the same every day as my routes differ but on average I am 2mpg better than before.

I will keep monitoring this and report back.
Thanks for the info, did BMW do the oil change for you or did you do that yourself, if its the latter you're a brave guy as I would imagine that oil is well out of spec?

I'm currently topping up on Castrol edge 0w30, I was curious if 0W40 might improve things and its still in spec.

Interestingly my economy is great, my overall average is low 20's but i can easily see 26 on a motorway run. My concerns are more long term but I've read a few other threads (one linked below) that suggest this 1 litre per thousand miles scenario is quite common on these cars.

http://f10.m5post.com/forums/showthread.php?t=702987
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      04-23-2014, 05:52 PM   #13
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I don't think 1litre/1,000 miles is all that uncommon initially. Mine used to use that much but has now settled down since I've been using the Castrol European 0W-30 oil as recommended by others here.
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      04-24-2014, 01:28 PM   #14
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I realise it being a risk and had the oil change done myself. 0w40 may improve things a little bit.

This is all about viscosity (thickness of the oil) the part of the spec that is concerning is the 0w bit.
The fresh oil (BMW recommended)is like water it is extremely thin. The recommended oil is 5w30 so essentially I have only increased the lower temperature by 5w

The part I was worried about was the 60 in the race oil. This is the higher temperature at which the oil begins to break down.
Logically the temperature that the turbos run at the 5w oil will burn quicker than the 10w

The car seems happier I.e better fuel consumption, no oil consumption so far. So obviously it is liking the oil.
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      04-24-2014, 03:53 PM   #15
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Quote:
Originally Posted by smithy23 View Post
I realise it being a risk and had the oil change done myself. 0w40 may improve things a little bit.

This is all about viscosity (thickness of the oil) the part of the spec that is concerning is the 0w bit.
The fresh oil (BMW recommended)is like water it is extremely thin. The recommended oil is 5w30 so essentially I have only increased the lower temperature by 5w

The part I was worried about was the 60 in the race oil. This is the higher temperature at which the oil begins to break down.
Logically the temperature that the turbos run at the 5w oil will burn quicker than the 10w

The car seems happier I.e better fuel consumption, no oil consumption so far. So obviously it is liking the oil.
The engine was not designed for that viscosity, and it will cause problems. At the very least you are creating extra heat in the engine and losing power, while increasing wear at start up ( the thick oil does not make it to all parts of the engine to lubricate effectively). Burning oil has nothing to do with the viscosity of the oil , it can have something to do with the oils flash point and stability if being used at high temperatures on track but that is not the case here. The oil loss 99% of people on this forum complain about is from blowby due to incomplete piston ring sealing during the combustion cycle. If you're car has this, oil consumption occurs at a greater rate when you drive it hard, flooring it when the engine is not fully warmed up is the worst offender. You're MPG has gone up bc you are driving the car easier , it has nothing to do with the oil. By overdoing the viscosity extensively at both start up and operating temps you risk damaging you're engine from friction at startup , and excessive oil pressure when you approach redline rpms. The engine, including the bearing clearances were designed for 30-40 w oil thats what you should use. German Castrol 0w-30 or 0w-40 are the best options that are BMW spec. Also FYI 10w-60 was used in the old M motors bc of the bearing tolerances were so large to protect them. This is not a problem in the S63tu.
George
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      04-29-2014, 03:45 PM   #16
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Just out of interest I checked out the situation with my dealer in respect of oil consumption. Apparently BMW state that using 0.6ltr per 1000km is within tolerances!
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      05-01-2014, 05:49 AM   #17
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7000 miles in 1.5 years I have added 3 quarts.
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      05-03-2014, 09:21 AM   #18
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Quote:
Originally Posted by stealth.pilot View Post
The oil usage varies widely. There was one guy here who was having to fill oil at 1 liter per 800 miles, and after escalating to BMW he was told that this is normal - WTF!

I have owned two F10 M5s and my oil usage was one liter per 18,000 miles (no typo). This is prorated usage because I changed my oil before 18,000 miles but measured the oil before changes and also oil removed. Point is never had to add oil, two M5s in a row. I attribute my lack of oil usage to Alpine driving (I.e. Spending first 1200 miles on windy country roads, not taking highways, and observing break in rules). This said I know many of huge oil burners claim they did the same thing so maybe it doesn't make a difference.

I'm at 14 and its asked for oil twice... Weird tho about 5 days ago [less than 100miles driven this week] it came on "need a quart minimum" white message, then last nigth after an 88 mile trip it came on orange same message when I stopped and took the reading it was like 2 inches below the minimum line which shocked me, regardless put a quart in this morning and its now about two inches under max... If thats an accurate representation and knowing the engine takes like 6+quarts how is it possible its "full" lol

Oh and I'm 2.5k away from my 7500 mile oil change they would not take it in early lmao to just change it...
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      05-09-2014, 06:48 PM   #19
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The engine holds 8 liters (8.45 quarts); the filter and housing holds another 0.5 liters (0.53 quarts). (I know this doesn't answer your question.)

However, it may be related to another post (changing to 10W-60). When the 1,200 miles service is performed one of the steps is to recalibrate the oil level sensor for the change from break-in oil to regular oil. It could be that your oil level sensor needs recalibration. It can only be done by the dealer's computer. If it were my car I'd take it to the dealer to have the sensor checked or recalibrated.
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      05-18-2014, 07:14 PM   #20
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I just had my 12,000 mile oil change and I only had to add one quart the entire time.
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      05-18-2014, 07:33 PM   #21
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Quote:
Originally Posted by wrsbmw
I just had my 12,000 mile oil change and I only had to add one quart the entire time.
I am about to have my 9000 mile service and have added none...funny thing though with my 550 msport I added like crazy even carried a quart with me in the trunk
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      05-20-2014, 05:17 PM   #22
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Quote:
Originally Posted by Mbdurham17 View Post
I am about to have my 9000 mile service and have added none...funny thing though with my 550 msport I added like crazy even carried a quart with me in the trunk
I do that too just in case. I had to do the add on a trip to Dallas in February. I pulled into the trucksop at Carl's Corner on 35E and added the Castrol they gave me at the dealer. I bought a new 5w-30 Mobil 1 to replace it and that is still in there.
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