B8 Oil consumption

[VeNoMS4]

I understand a lot of people have posted about this before but i had a thought.

So my scenario: It's been roughly 4500-4700 since my oil change, the oil light comes on and tells me to add another quart. So i added a qt of castrol 5w40 oil and everything is good. fast forward, ~3 weeks and ~750 miles later, the light comes on again. I initially thought something must be wrong but then thinking about it, i am close to another oil change.

So question is, does the oil consume faster as the oil gets used, as in, as you get closer to your routine oil change time frame? What are your thoughts.

[mintytoo]

I understand a lot of people have posted about this before but i had a thought.

So my scenario: It's been roughly 4500-4700 since my oil change, the oil light comes on and tells me to add another quart. So i added a qt of castrol 5w40 oil and everything is good. fast forward, ~3 weeks and ~750 miles later, the light comes on again. I initially thought something must be wrong but then thinking about it, i am close to another oil change.

So question is, does the oil consume faster as the oil gets used, as in, as you get closer to your routine oil change time frame? What are your thoughts.

How many miles on yours? I didn't even know s4 had that issue. I thought it was with the b8 a4.

[VeNoMS4]

How many miles on yours? I didn't even know s4 had that issue. I thought it was with the b8 a4.

im at about 59k miles.

[SwankP3RF3ct10n]

I've always had a similar issue to this. I use Mobil 1 and think it's just the damn oil or something. I used it in my previous car and had the same issue. I had the PCV changed in this car and it's still doing it. It's bullshit and it seems to eat more of the oil as the oil gets older and older. I change mine every 10k and just keep an eye on it almost weekly via the MMI and whenever I have the hood open I'll check the stick... it's just become a normal thing to do, like in my previous car.

[mintytoo]

I've always had a similar issue to this. I use Mobil 1 and think it's just the damn oil or something. I used it in my previous car and had the same issue. I had the PCV changed in this car and it's still doing it. It's bullshit and it seems to eat more of the oil as the oil gets older and older. I change mine every 10k and just keep an eye on it almost weekly via the MMI and whenever I have the hood open I'll check the stick... it's just become a normal thing to do, like in my previous car.

What year is yours? Miles?

[SwankP3RF3ct10n]

2010 and like 70-something k on it. It's done it ever since I've had it and it, so I don't think I've gotten away with thousands and thousands of miles and bad rings, etc. I honestly think it's just the oil, but don't feel like changing to Castrol German (since it's impossible to find now) or something else to test since I trust Mobil 1 pretty well.

[derek.kritz]

750 miles for a quart is a little excessive. I go though quart about every 2-2.5k miles. Which is under the tolerance level though Audi. I think Audi has a restrictor fitting for the PVC system to control oil consumption.


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[mintytoo]

2010 and like 70-something k on it.

When did this eating oil issue start for your car?

[VeNoMS4]

750 miles for a quart is a little excessive. I go though quart about every 2-2.5k miles. Which is under the tolerance level though Audi. I think Audi has a restrictor fitting for the PVC system to control oil consumption.


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yea 750 is absurd but is there any correlation to the fact that im pretty close to an oil change? Could that be the reason? The first time the oil light came on after the last oil change is after 4k miles.

I mean how long before the motor burns more oil after you added a qt to used up oil?

at this point am going to get the oil changed and keep track of this.

[BrzozoD]

I have a 2013 with 38K on it. I have to put in 1 quart every 4,500-5,000 miles. Never any more, and never any less. Its been consistent

[windowguy]

I had an oil consumption issues on my 2012 when I bought it used back in 2014. I took it to the dealer and they changed the PCV valve and the oil consumption stopped.

I would start with a PCV valve change. Not an easy job as the super charger needs to come off. If oil consumption continues then you have an issue with the the rings or the valves.

Rob.

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[nunzo]

I've noticed some oil consumption, and the MMI and dipstick don't always match. 2010 car stage 2 tuned

60,191 - full oil change using Audi OEM filter and Mobil 1 european formula
62,170 - mmi low oil - added 700ml
63,840 - mmi low oil - added 300ml
64,683 - mmi low oil - added 600ml

so in 4,500 miles, i've had to add a quart and a half, getting progressively worse as the oil gets older.

[theweebabyseamus]

2010 and like 70-something k on it. It's done it ever since I've had it and it, so I don't think I've gotten away with thousands and thousands of miles and bad rings, etc. I honestly think it's just the oil, but don't feel like changing to Castrol German (since it's impossible to find now) or something else to test since I trust Mobil 1 pretty well.

Where are you located? We have it at Walmart here :shrug:

But yeah, might be time to look into your PCV setup OP.

[SwankP3RF3ct10n]

Where are you located? We have it at Walmart here :shrug:

But yeah, might be time to look into your PCV setup OP.

No, you don't. I can almost guarantee you that because they stopped making it for the US a few years ago. When I say German Castrol, I mean "the green stuff". Yes, the oil was actually a dark green color. The Castrol they have now that's listed as Euro formula or whatever, even though it says Made in Germany on it, isn't the same from what I've seen. There is one 5w40 Made in Germany Castrol I've seen the local AutoZone carry, but I don't believe that's the old green stuff either. Seems as of the past few years, most of these companies have changed their shit so much nobody knows what's good anymore. I truly believe that Mobil 1 is just too thin and the more it remains in use, the more of it just burns off. I contemplated going back to 5k oil changes, but even then, after 3k I still had to add a little bit of oil and the analysis I did for the 10k changes came back fine, so whatever.

[SonnyDeez]

I had an oil consumption issues on my 2012 when I bought it used back in 2014. I took it to the dealer and they changed the PCV valve and the oil consumption stopped.

I would start with a PCV valve change. Not an easy job as the super charger needs to come off. If oil consumption continues then you have an issue with the the rings or the valves.

Rob.

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I have a 2012 and it had this issue right when I bought it from a guy, but then it stopped after the first oil change. I also had the PCV valve replaced which may have helped. I used to use the Mobil 1 0W40 but lately I've been using Castrol and Motul 5W40 instead and have been tracking the car quite a bit and haven't had any problems.

[SportVier]

FWIW, at ~50k and oil has only been changed by a dealer at recommended (10k) intervals. Have never seen the level get below halfway between Min and Max (on the display) and never had any Low warnings. Nice change from my old B7 RS4. She was sucking down a liter every 500 miles at the end...

[VeNoMS4]

so if the PCV valve is the issue, the part seems inexpensive so labor is going to be the one to rape me since the SC needs to come off? damn

[Dr GP]

I would also be very suspicious of the PVC valve. If you get it done, I would have an indy garage do it. PLUS, while you have the SC off, change the T stat as well. My car, that I bought used with 48k miles, also consumes some oil. I do have an extended warranty but don't really want to go through an Oil consumption test . So actually hoping for the T stat to fail and then have the PVC valve done with the SC off.

[B8Addict]

so if the PCV valve is the issue, the part seems inexpensive so labor is going to be the one to rape me since the SC needs to come off? damn

It should only take one hour to remove the supercharger, so hopefully not too much in regard to replacing the PCV.

[VeNoMS4]

I would also be very suspicious of the PVC valve. If you get it done, I would have an indy garage do it. PLUS, while you have the SC off, change the T stat as well. My car, that I bought used with 48k miles, also consumes some oil. I do have an extended warranty but don't really want to go through an Oil consumption test . So actually hoping for the T stat to fail and then have the PVC valve done with the SC off.

why the thermostat? i understand its component that fails often in this car. When they change, do they change it to something so that it doesnt fail anymore? like the water pump from plastic to Al?

[SwankP3RF3ct10n]

why the thermostat? i understand its component that fails often in this car. When they change, do they change it to something so that it doesnt fail anymore? like the water pump from plastic to Al?

Do yourself a favor and change it. It gets changed to a newer revision, but some believe it's no more stout than the original. The problem is the thermostat in these cars is plastic and over time it's believe that it becomes brittle from the temp fluctuations and liquid it's constantly surrounded by. That said, it's almost idiotic not to change it if you're already in there. It's just a few more screws to take off and replace. Both PCV and thermostat require the removal of the supercharger and if you're not doing the work yourself, it's stupid to have to pay twice for it. My thermostat failed and I had the PCV changed... didn't do shit for the oil consumption issue, but it was something that needed to be done, so while you're in, do it. Now, if you're doing the work yourself, then that's your call, since it doesn't cost you any money, just time if you had to do both things separately.

[VeNoMS4]

Do yourself a favor and change it. It gets changed to a newer revision, but some believe it's no more stout than the original. The problem is the thermostat in these cars is plastic and over time it's believe that it becomes brittle from the temp fluctuations and liquid it's constantly surrounded by. That said, it's almost idiotic not to change it if you're already in there. It's just a few more screws to take off and replace. Both PCV and thermostat require the removal of the supercharger and if you're not doing the work yourself, it's stupid to have to pay twice for it. My thermostat failed and I had the PCV changed... didn't do shit for the oil consumption issue, but it was something that needed to be done, so while you're in, do it. Now, if you're doing the work yourself, then that's your call, since it doesn't cost you any money, just time if you had to do both things separately.

Thanks for the tip. I'll definitely do it then

[SDV325]

if I'm not mistaken I remember reading about a TSB regarding the PCV valve and the premature failure of it. It wasn't an issue right across the board but if you experience issues of oil consumption where more than 1quart of oil was required between service intervals then they would take a look (ie replace the PCV).

When I first bough my car with 22K kms on it, I needed a quart in between service intervals (15K kms) for the first 2 services. However now the last 2 I haven't needed to add oil and I see very minimal consumption. I'm at 70K kms now.

Very odd indeed since the dealer has always been doing the changes via Audicare. Only difference I can think of is now that I have a garage to park in where as before I was always outside.

[SwankP3RF3ct10n]

That TSB also called for a new ECU flash if I'm not mistake, so I'm wondering if something was different in that ECU flash that made more of a difference than the PCV swap itself. I know when I had mine swapped, it was at the time I did the thermostat, so not part of the oil consumption TSB and hence the tech wouldn't have followed that... maybe that's the difference or something. Who knows... too lazy to dig up the TSB to verify the flash thing, but I vaguely remember something along those lines.


Found it... apparently the issue requiring an ECM update was in conjunction to actual DTCs, which I don't have.

Here is an interesting TSB:

Vehicle: 2011 Audi S4
NHTSA ID Number: 10051502
Nature of Defect: ELECTRICAL SYSTEM: SOFTWARE
Bulletin Number: TSB-01-12-58
Bulletin Date: Nov 2012
SUMMARY: AUDI: WHILE DRIVING, MAINLY SHORT DISTANCE (STOP AND GO), HIGH CRANKCASE PRESSURE CAN LEAD TO DTCS P113700 AND P113900 CODES. CRANKCASE PRESSURE CAN BE LOWERED WITH NEW ECM (ENGINE CONTROL MODULE) SOFTWARE LEVEL AFTER CHANGING CRANKCASE PRESSURE VALVE TO IMPROVE AND ELIMINATE MENTIONED DTC CODES. MODELS 2010-2012 S4, S5, 2009-2011 A6 (C6), 2011-2012 Q7, 2012 A6, A7. *PE

Vehicle Make Model Model Year(s)
AUDI A6 2009-2012
AUDI A7 2012
AUDI C6 2009-2012
AUDI Q7 2011-2012
AUDI S4 2010-2012
AUDI S5 2010-2012

[theweebabyseamus]

No, you don't. I can almost guarantee you that because they stopped making it for the US a few years ago. When I say German Castrol, I mean "the green stuff". Yes, the oil was actually a dark green color. The Castrol they have now that's listed as Euro formula or whatever, even though it says Made in Germany on it, isn't the same from what I've seen. There is one 5w40 Made in Germany Castrol I've seen the local AutoZone carry, but I don't believe that's the old green stuff either. Seems as of the past few years, most of these companies have changed their shit so much nobody knows what's good anymore. I truly believe that Mobil 1 is just too thin and the more it remains in use, the more of it just burns off. I contemplated going back to 5k oil changes, but even then, after 3k I still had to add a little bit of oil and the analysis I did for the 10k changes came back fine, so whatever.

Actually yeah you're right, my mistake. It was the Belgian Castrol 0-40 that according to BTOG's site is as good as GC, if not better. You're right, my mistake.

[VeNoMS4]

dumb question.. but when there is a TSB on your car and your car is out of warranty, will the dealership still fix it since, you know, its a manufacturer defect? or are they going to charge?

[EddieK12]

Hey y'all, finally a thread I can relate too.
2010 S4, I burn one quart of oil every 190 miles.. Yeah, a 5 quart jug of oil in my trunk lasts me one thousand miles..
Already replaced the PCV valve. Doing a leak down test in a couple weeks, and most likely replacing the piston rings. 180k miles and running well

[VeNoMS4]

Hey y'all, finally a thread I can relate too.
2010 S4, I burn one quart of oil every 190 miles.. Yeah, a 5 quart jug of oil in my trunk lasts me one thousand miles..
Already replaced the PCV valve. Doing a leak down test in a couple weeks, and most likely replacing the piston rings. 180k miles and running well

you have 180k miles!!!??? is this like some kind of record!?

[Dirt]

OP - when the light came on the second time, were you able to visually check the level oil level (with a dipstick), or are you relying on the light? I remember someone here having a similar issue.....he added oil and ended up going way over capacity. Turns out that there was a fault with the light/sensor and he was adding oil to a full pan.

.

[VeNoMS4]

OP - when the light came on the second time, were you able to visually check the level oil level (with a dipstick), or are you relying on the light? I remember someone here having a similar issue.....he added oil and ended up going way over capacity. Turns out that there was a fault with the light/sensor and he was adding oil to a full pan.

.

I wasn't.. I just bought the dipstick for this very reason. I did put some oil in to get the light to go away

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[Dirt]

Well damn. On the bright side, you've eliminated at least one root cause. Lol

.

[mrmomo313]

I'm at about 3/4 oil level on MMI after 1335 miles on this oil... (3k intervals these days. 70k on the clock). Back when I used it as a dd (and it was stock). I'd add one quart during every 7k interval...

[theweebabyseamus]

Hey y'all, finally a thread I can relate too.
2010 S4, I burn one quart of oil every 190 miles.. Yeah, a 5 quart jug of oil in my trunk lasts me one thousand miles..
Already replaced the PCV valve. Doing a leak down test in a couple weeks, and most likely replacing the piston rings. 180k miles and running well

You sure you're not driving a 335? Lol

[EddieK12]

you have 180k miles!!!??? is this like some kind of record!?

Not sure, I'm sure it's one of the more higher miles around though! Never really posted on the forums often, original engine, transmission and clutch

[jsh139]

dumb question.. but when there is a TSB on your car and your car is out of warranty, will the dealership still fix it since, you know, its a manufacturer defect? or are they going to charge?

Sure, they'll fix it, but they'll charge you for it. A TSB isn't a recall. It's basically just resolution steps that the manufacturer suggests the dealer to follow to solve a known problem.

[VeNoMS4]

Sure, they'll fix it, but they'll charge you for it. A TSB isn't a recall. It's basically just resolution steps that the manufacturer suggests the dealer to follow to solve a known problem.

Ah.. Just as I expected. Thanks

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[j1n]

Ah.. Just as I expected. Thanks

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The only time a dealer will do work for free on your car that's out of warranty is if its a manufacture defect that has to do with the safety of the vehicle.

[SportVier]

180k miles and running well

[Wreckm]

73k Miles did my oil change at 66k light came on and added a quart at 70k
I have been adding 1 quart in between oil changes but i am trying to change every 5k

[Dirt]

The only time a dealer will do work for free on your car that's out of warranty is if its a manufacture defect that has to do with the safety of the vehicle.

Or if a new issue was caused by a recent dealership repair. I had a bad injector o-ring that was leaking a tiny bit of fuel.....apparently my car had some work done to the fuel system previously and my local Audi dealer covered the o-ring fix.

.