Oil consumption

[AWo]

In general oil consumption of newer engines (I would say after 2005-2010) is increased. That is due to achieve the goal to reduce friction of the piston rings and thereby reduce fuel consumption (reducing inner engine friction is a very sucessful measure in regards to fuel consumption).

By reducing the tension of the rings with which it is pressing against the cylinder wall to reduce friction, more oil can pass. If you have a chance to see an open cylinder block check the cross-hatching. It should be more fine and the grooves should be less deep than with an older engine. That is to compensate the reduced pressure of the rings, as less oil is kept in the small depositis in the cylinder wall. As the BMW engines have cylinders which were worked on with plasma, these deposites should be very small, but still this leads to more oil consumption than for older engines, let's say from the 90's. In addition these reduces the safe space for errors made in production and the wear over time.

So, get used to it. 1 liter of oil per 1,000 km is common today and sometimes it is even written in the manual that the engine "will consume a certain amount of oil". Depending on the oil change interval and the amount of oil in the engine, I would be carefully monitor this and top up when required.

AWo

 

[Reducs]

1 liter of oil per 1,000 km is common today...

AWo

So, if you're burning oil at that rate, couldn't you (in theory) never change the oil since you're constantly "refreshing" it? If you did the filter every 10k, wouldn't you be good?

I've never had a car burn oil at the rate, but I know it's now a thing. Can't be good for the catalytic either I'm guessing.

 

[AWo]

So, if you're burning oil at that rate, couldn't you (in theory) never change the oil since you're constantly "refreshing" it? If you did the filter every 10k, wouldn't you be good?

I've never had a car burn oil at the rate, but I know it's now a thing. Can't be good for the catalytic either I'm guessing.

Think through again.

Oil consumption of new four cylinder diesel engines is listet as 0,25 to 0,5 liter per 1,000 km. The BMW B57 diesel engine has six cylinders. That adds 0,25 liter per 1,000 km, ending up with 0,75 liter per 1,000 km.
When you add wear over the years, it adds up, so we come close to 1 liter per 1,000 km.

But let's assume it is in the designated range of 0,5 up to 0,75 liter per 1,000 km. The service oil capacity is 6,5 liter. That means all of the 6,5 liter are used up between 13,000 and 8,666 km, depending on the burn rate. So yes, you have to top up even if everything is within range.

The filter is not in harm, that's why you have to use C2 oils. Of course, it increases the ash load if it is burned more than planned, but the DPF is not in harm. C2 oils request a maximum of sulfated ash of 0,8% with a medium SAPS value (sulfated ash, phosphor and sulfur). SAPS is necessary to keep the alkaline value of the oil so it is capable to defeat acid.

AWo

 

[FlyingTexan]

BMW specifications for both engines are around 1 litre per 1000kms (by design as @NQ94 said above)
Saying that, I don't think I have used much oil on my B57. Hard to tell without a dipstick.

Which is why using a 0w20 is nonsense. If a motor is losing 1l per 1000km that 1qt per 588 miles, you’ve got a serious problem.

 

[landmannnn]

Which is why using a 0w20 is nonsense. If a motor is losing 1l per 1000km that 1qt per 588 miles, you’ve got a serious problem.

Apparently not. The wide clearance in the bores is designed that way to reduce friction.

 

[NQ94]

This bloke has some good well researched easy to follow videos about modern engines explaining current issues.
From research mainly using Toyota diesel engine specifications from OEM publications and hours on Toyota OEM portal it can be seen in the last 30 years rings are getting narrower the, the end gaps are getting less, the ring vertical clearances are getting higher and depending on block and piston material and design the piston clearances have reduced slightly. Assuming if Toyota is using these methods for engines other manufacturers are doing the same.

View: https://youtu.be/Ft12aZffCEg?si=qunPEA4Hi2cSbxTM

View: https://youtu.be/8Kp108x4tQA?si=dUXBwSn3h2Mte-yn

 

[CJV]

One of my few serious gripes about the 24' Grenny is the fact that there is no dipstick nor a way to measure the oil level without draining it out of the vehicle. Having driven the truck for over a year and 15k miles, and given my experience with the B58 oil consumption on several BMWs, I am adding 1/3 of a US quart every 3,000 miles. It was a little over a quart low on a highway drive at about (the original break-in) 9k miles, so I figure 1/3 qt. should keep it up to proper level. I had the oil changed at 12k, so I added my first 1/3 qt. today. Next time I change the oil, I'll measure the drained volume, and will reply to this thread if I get a low oil volume before then.