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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 06-29-2017, 07:51 PM   #41
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Originally Posted by sprintman View Post
That's a very thin 40W. Try Rotella T, it's a much thicker 40W with more cleaning additives which will clean up the ring pack
From 13.5 to 15.5 cst @100c, is that really comparatively "very thin"? Genuine BMW 5W-30 is 11.9. Shouldn't that be the baseline for "thick" considering it's the required oil.

Shanneba wanna weigh in to. Where's my oil patriot guy?
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Old 06-30-2017, 02:14 AM   #42
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Toby, you are the crazy one if you think you can solve this problem by other means than an engine rebuild.
I am crazy,

but not crazy enough to think that a quart every 3000 miles is reason to spend $5k or so on an engine that runs fine otherwise...

A quart every 300 miles is a problem. A quart every 3000 is a feature.

t
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Old 06-30-2017, 02:43 AM   #43
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Dear Spannerhead......YES...I am a different German user...(here)...I, if given could make a YOUGO live 250k

German cars have been built for freaks like me too for years!...Not just for racing, but for long time durability and ability to stand 20 years and more. Maybe another quality of German cars you haven't come to realized yet.

SpannerHead....As an American, born in 55, I am likely older than you..I have owned 5 German cars from over the past 45 years. My first was a Lincoln Mercury, a 1972 Capri.....yes, built in Germany...four MB cars, one Audi, and now an E46.

I'm not a wise-guy 'SpannerHead'....I respect ignorant and unfortunate human beings that express a passion to learn!
Relax my man. No one is picking on you, he definitely wasn't calling you a wise guy.
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Old 06-30-2017, 04:59 AM   #44
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Originally Posted by Mango View Post
From 13.5 to 15.5 cst @100c, is that really comparatively "very thin"? Genuine BMW 5W-30 is 11.9. Shouldn't that be the baseline for "thick" considering it's the required oil.

Shanneba wanna weigh in to. Where's my oil patriot guy?
That's a lot when you look at the SAE viscosity chart. Very noticeable even to the naked eye when pouring
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Old 06-30-2017, 05:34 AM   #45
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Doesn't the XI model take 8 quarts? The OP said the oil change was with 7 quarts.
I would top it up and watch it closely for the rest of the Oil Change Interval, he may have started a quart low.

Mobil 1 0w-40 is a "thinner" 40 weight oil ~13.0 Cst, but still "thicker" than the BMW 5w-30.
Rotella 5w-40 is about 13.4 cSt (maybe as high as 14.0)
Rotella Triple protection 15w-40 is about 15 cSt so is the thickest.


Boron, Calcium and Magnesium are the primary detergents.

Rotella Triple protection 15w-40 has about 2350 ppm calcium, 10ppm magnesium, and 40 ppm boron.
Rotella T6 5w-40 is low on calcium at about 800ppm, it does have a good quantity of magnesium ~1200ppm, boron at about 70ppm.
Mobil 1 0w-40 will have about 2400ppm calcium, and little magnesium ~20ppm, it goes have a good shot of boron at about 100ppm.

I would say the Mobil 1 has more "detergents".

Shell Rotola T6 5w-40 13.40cSt
https://www.bobistheoilguy.com/forum...Number=2330040

Various 15w-40 diesel oils (Rotella T6 SYN 5w-40 14.09cSt)
http://www.pqiamerica.com/June%20201...EO%202015.html
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Old 06-30-2017, 06:30 AM   #46
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Delvac 1 13.56 cSt @ 100C another good choice
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Old 06-30-2017, 07:19 PM   #47
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A quart every 300 miles is a problem. A quart every 3000 is a feature.

t
feature
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Old 06-30-2017, 08:10 PM   #48
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Doesn't the XI model take 8 quarts? The OP said the oil change was with 7 quarts
Mine doesn't take 8, 7 just like my m52.
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Old 06-30-2017, 09:16 PM   #49
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feature
I guess these cars a just full of features
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Old 07-01-2017, 07:55 AM   #50
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My Bentley Service Manual shows these oil capacities-

Engine oil capacity (includes filter replacement)
Rear wheel drive 6.5 liters (6.9 qt.)
All wheel drive 7.5 liters (7.9 qt.)
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Old 07-17-2017, 01:19 AM   #51
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Do M52 pistons work in the M54? Same bore, right? What about aftermarket pistons like from Wiseco or some such?
I'm not completely sure about this, my guess without a mic and the pistons in my hand is that they're probably very close to identical and would work BUT there's a better solution. There is nothing wrong with the M54B30's pistons, it's the oil control rings that seem to be problematic. The M54 uses a 2-piece ring and the M52 uses a traditional (and time tested) 3-piece oil ring. Use the 1st and 2nd compression rings from the M54 and use the M52 oil control ring. IF this had been the design from the factory we'd probably have very few threads about high oil consumption.

Tie that in with another problem that BMW started in a capitalistic drive to keep us buying a new car every 3 or 4 years, the 15,000 mile oil change. This in combination with the 2-piece oil ring are co-culprits in the high oil consumption challenge we face because by 15,000 miles there is bound to be buildup on the piston wall down toward the bottom and the oil ring gathers some of the crud, embedding it in the oil ring and accelerating wear.

I just did the O2pilot mod, hoping for some minor relief. As it stood before the O2pilot mod I was burning through a quart about every 1,200-1,500 miles.
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Old 07-17-2017, 01:27 AM   #52
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I was burning a quatt every 1k miles. O2pilot and rotella T6 and i just went 7500 without having to top off.
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Old 07-17-2017, 08:46 AM   #53
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My Bentley Service Manual shows these oil capacities-

Engine oil capacity (includes filter replacement)
Rear wheel drive 6.5 liters (6.9 qt.)
All wheel drive 7.5 liters (7.9 qt.)
The Bentley manual has been known to be wrong.
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Old 07-17-2017, 08:53 AM   #54
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There is nothing wrong with the M54B30's pistons, it's the oil control rings that seem to be problematic. The M54 uses a 2-piece ring and the M52 uses a traditional (and time tested) 3-piece oil ring. Use the 1st and 2nd compression rings from the M54 and use the M52 oil control ring. IF this had been the design from the factory we'd probably have very few threads about high oil consumption.
Is this an accepted practice when rebuilding an M54 bottom end? If not, it should be.
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Old 07-17-2017, 04:56 PM   #55
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I was burning a quatt every 1k miles. O2pilot and rotella T6 and i just went 7500 without having to top off.
I was at 250mi/quart. O2Pilot got me to 450mi/quart. Rotella T6 got me back down to 250mi/quart. Went back to Castrol 0W40 and got back to 450mi/quart. Catch can got me to 2500mi/quart. I can live with 2500mi/quart.
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Old 07-17-2017, 05:11 PM   #56
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I was at 250mi/quart. O2Pilot got me to 450mi/quart. Rotella T6 got me back down to 250mi/quart. Went back to Castrol 0W40 and got back to 450mi/quart. Catch can got me to 2500mi/quart. I can live with 2500mi/quart.
I believe we are in the vacuum hose/maf/brake booster era of the e46 and will soon be thick into the piston ring/oil consumption phase as a group...
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Old 07-17-2017, 05:30 PM   #57
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I believe we are in the vacuum hose/maf/brake booster era of the e46 and will soon be thick into the piston ring/oil consumption phase as a group...
If that results in engine rebuilds, the 50's kid mentioned a place local to him that sells a set of rings with m54 rings for the two compression rings and m52 oil rings.
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Old 07-19-2017, 02:09 AM   #58
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I believe we are in the vacuum hose/maf/brake booster era of the e46 and will soon be thick into the piston ring/oil consumption phase as a group...
You know the truly sad part of this is the motors compression characteristics at 235k miles aren't bad but the oil consumption is horrible. If oil control was better the compression characteristics might be even better and we'd probably see somewhat common half million mile motors. I still think mine would make it to half million but by that time I could have paid for a rebuild with my investment in oil futures.
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Old 07-19-2017, 09:41 AM   #59
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If that results in engine rebuilds, the 50's kid mentioned a place local to him that sells a set of rings with m54 rings for the two compression rings and m52 oil rings.


M54 piston rings with M52TU oil control rings:
http://www.ebay.com/itm/131912802729
Partially NPR (Nippon Piston Rings), made in japan, and partially Grant, made in USA.
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Old 07-19-2017, 12:23 PM   #60
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Very disappointed in the garbage caliber advice being given to the OP by Mango.

It is common for these engines to burn 1 QT every 1000 miles.
There is nothing wrong with your engine. You do not need a freaking rebuild.

Utterly ridiculous paranoid idiot scare tactics.
Drive your car and check the oil level every 1000 miles.
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