oil viscosity

andas · 10-20-2016, 11:32 AM

Hello, I have BMW e90 325i n52 sedan, and I have to add 1liter/quart of oil every 400miles/600km

I'm wondering if the oil consumption can change if I use different kind of oil brand/viscosity?

Currently using 5w-30 fully synthetic

Been searching about the oil viscosity and what it means but haven't found anything :S

I live in kinda cold climate country.

jt335i · 10-20-2016, 12:15 PM

Having to add 1L of oil every 400 miles/600kms? That's highly unusual to lose that much oil in such a short mileage distance so you must have some kind of leak somewhere. Changing the oil viscosity can affect oil consumption, but not by how much you are having to add. Someone correct me if I'm wrong. You are already using 5w-30 fully synthetic which is the correct oil so you should have your engine checked for worn seals and gaskets especially if it has high miles.

andas · 10-20-2016, 12:19 PM

Quote:

Originally Posted by jt335i

Having to add 1L of oil every 400 miles/600kms? That's highly unusual to lose that much oil in such a short mileage distance so you must have some kind of leak somewhere. Changing the oil viscosity can affect oil consumption, but not by how much you are having to add. Someone correct me if I'm wrong. You are already using 5w-30 fully synthetic which is the correct oil so you should have your engine checked for worn seals and gaskets especially if it has high miles.

Basically I spoke about that issue to mechanic in my country and he told me that fixing this issue would probably be really expensive...?
I looked up gaskets and seals replacements and they aren't that expensive in US ?
He said lowest price would be 500 euros and it can only go higher depending on the problem. That's weird.

And also to note he just checked if there's no leaks, there wasn't. So the oil is getting in the engine and being burned most likely.

unrulyteach · 10-20-2016, 06:43 PM

U must hav a typo or a major leak

Efthreeoh · 10-21-2016, 05:56 AM

I think you need to do a compression and leak down test to confirm the health of the cylinders. If they are all close to specification, then look at the oil separator, it may be broken and allowing oil to get into the intake an thus being burned during combustion.

Good luck with it.

mxchris727 · 10-21-2016, 08:33 AM

Quote:

Originally Posted by andas

Basically I spoke about that issue to mechanic in my country and he told me that fixing this issue would probably be really expensive...?
I looked up gaskets and seals replacements and they aren't that expensive in US ?
He said lowest price would be 500 euros and it can only go higher depending on the problem. That's weird.

And also to note he just checked if there's no leaks, there wasn't. So the oil is getting in the engine and being burned most likely.

Are the seals valve guide seals? Those should not go bad unless the engine has been overheated at some point in its life.

The Nightman · 10-21-2016, 08:44 AM

I think oil viscosity is the least of your concerns if you are topping off 1L every 600km. To answer your question, though, I would use a 0w40 A3 oil with LL01 spec preferably.

unrulyteach · 10-22-2016, 09:31 AM

What should the oil level be when it needs a quart when using a obd2 to check?

10-20-2016, 11:32 AM	#1
andas Private First Class 17 Rep 120 Posts Drives: multipla Join Date: Mar 2016 Location: Lithuania iTrader: (0)	oil viscosity Hello, I have BMW e90 325i n52 sedan, and I have to add 1liter/quart of oil every 400miles/600km I'm wondering if the oil consumption can change if I use different kind of oil brand/viscosity? Currently using 5w-30 fully synthetic Been searching about the oil viscosity and what it means but haven't found anything :S I live in kinda cold climate country.
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10-20-2016, 12:15 PM	#2
jt335i Major 263 Rep 1,225 Posts Drives: 2010 E92 335i Monaco blue Join Date: Jan 2010 Location: Tampa, Fl iTrader: (0)	Having to add 1L of oil every 400 miles/600kms? That's highly unusual to lose that much oil in such a short mileage distance so you must have some kind of leak somewhere. Changing the oil viscosity can affect oil consumption, but not by how much you are having to add. Someone correct me if I'm wrong. You are already using 5w-30 fully synthetic which is the correct oil so you should have your engine checked for worn seals and gaskets especially if it has high miles. __________________ 2010 BMW 335i: Monaco blue metallic/Premium+Sport Auto-Steptronic, BMW PE, Cobb Stage 2 2005 Mustang GT: Redfire metallic/5-spd/Ford Racing (Axle backs, silver Bullitt wheels)/K&N CAI/ Diablo Sport Predator Tuner 1997 Toyota Corolla 1983 Mercedes Benz 380SL Roadster
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10-20-2016, 06:43 PM	#4
unrulyteach Colonel 392 Rep 2,367 Posts Drives: 2011 335i Join Date: May 2016 Location: myrtle beach sc iTrader: (0) Garage List 2011 BMW 335i [0.00]	U must hav a typo or a major leak
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10-21-2016, 05:56 AM	#5
Efthreeoh General 17309 Rep 18,733 Posts Drives: The E90 + Z4 Coupe & Z3 R'ster Join Date: May 2012 Location: Virginia iTrader: (0)	I think you need to do a compression and leak down test to confirm the health of the cylinders. If they are all close to specification, then look at the oil separator, it may be broken and allowing oil to get into the intake an thus being burned during combustion. Good luck with it. __________________ A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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10-21-2016, 08:44 AM	#7
The Nightman Cometh 1090 Rep 1,305 Posts Drives: Boy's Soul Join Date: Jul 2016 Location: Boy's Hole iTrader: (4) Garage List E90 LCI "330i& ... [10.00]	I think oil viscosity is the least of your concerns if you are topping off 1L every 600km. To answer your question, though, I would use a 0w40 A3 oil with LL01 spec preferably.
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10-22-2016, 09:31 AM	#8
unrulyteach Colonel 392 Rep 2,367 Posts Drives: 2011 335i Join Date: May 2016 Location: myrtle beach sc iTrader: (0) Garage List 2011 BMW 335i [0.00]	What should the oil level be when it needs a quart when using a obd2 to check?
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