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What could cause a decrease in oil consumption? #5382349 03/21/20 06:57 PM
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MCompact Offline OP
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The car: 2009 Cooper Clubman(N12 engine, no turbo)

I bought the Clubman with 104k miles on it; at that time it was using one quart of oil every 800-900 miles.

At 107k miles I replaced the valve cover as it was thought that a bad PCV valve(integrated into the VC) might be causing the consumption issues.

At 112k the oil was changed, and a non--LL-01 5W-30 synthetic was used(my fault, I neglected to tell the shop to use LL-01). Oil consumption continued to hover around 800-900 miles/quart.

At 116k miles the oil was changed using Mini(BMW) 0W-30. Oil consumption was unchanged until @119k miles- since then oil consumption has dropped to @1500 miles/qt.

There's been no change in driving conditions; I drive it a minimum of 24 miles per day, and it fully warms up during those drives. There are no misfire codes- so it isn't fuel dilution. Fuel economy hovers around 40 mpg.

So, any explanation as to what might have caused the welcome reduction in oil consumption? My guess is the BMW LL-01 oil may have freed-up a stuck oil control ring or two...


Mine:
2014 M235i
2009 Cooper Clubman
1999 Wrangler Sahara
1995 318ti Club Sport

Wife's:
2015 X1 xDrive28i M Sport


Son's
2009 328i

Buy what makes you smile...
Re: What could cause a decrease in oil consumption? [Re: MCompact] #5382353 03/21/20 07:01 PM
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CT8 Offline
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I would call it a miracle .


2015 F150 2.7
2018 F350 6.2
Re: What could cause a decrease in oil consumption? [Re: MCompact] #5382359 03/21/20 07:07 PM
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demarpaint Offline
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You might have gotten lucky and freed up the rings a bit. Or the car likes the latest fill of oil, it just took it a while to let you know. See what happens during the summer months, that could change things again.


God Bless Our Troops

Re: What could cause a decrease in oil consumption? [Re: MCompact] #5382378 03/21/20 07:53 PM
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blufeb95 Online Content
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Was the air filter neglected then changed at some point?

Re: What could cause a decrease in oil consumption? [Re: MCompact] #5382396 03/21/20 08:25 PM
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javacontour Offline
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How many miles on the car/oil now?

I've seen these where they are non-linear. I.E. the first quart may not burn off for 2000 miles. The next one in 1500, the next in 1000 and so on.

Until you go through a complete OCI, it's hard to say if the consumption you current experience is going to continue at the same rate.


network down, IP packets delivered via UPS -BOFH
Re: What could cause a decrease in oil consumption? [Re: blufeb95] #5382453 03/21/20 09:38 PM
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MCompact Offline OP
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Originally Posted by blufeb95
Was the air filter neglected then changed at some point?


I changed it at the same time I last changed the oil; I wouldn't say it was neglected at all. Thee same can't be said about the cabin filter, however.


Mine:
2014 M235i
2009 Cooper Clubman
1999 Wrangler Sahara
1995 318ti Club Sport

Wife's:
2015 X1 xDrive28i M Sport


Son's
2009 328i

Buy what makes you smile...
Re: What could cause a decrease in oil consumption? [Re: javacontour] #5382461 03/21/20 09:47 PM
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MCompact Offline OP
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Originally Posted by javacontour
How many miles on the car/oil now?

I've seen these where they are non-linear. I.E. the first quart may not burn off for 2000 miles. The next one in 1500, the next in 1000 and so on.

Until you go through a complete OCI, it's hard to say if the consumption you current experience is going to continue at the same rate.


121.8k miles on the car, 5.8k miles on the oil. As for oil usage during the current OCI, as I said, it varied from a high of 920 miles to a low of 790 miles for the first four top-ups. The fifth top-up at 121k was 1,494 miles. As noted, the car now has almost 122k on it and only 0.5 quart of oil has been consumed- so if anything oil consumption has decreased even more.


Mine:
2014 M235i
2009 Cooper Clubman
1999 Wrangler Sahara
1995 318ti Club Sport

Wife's:
2015 X1 xDrive28i M Sport


Son's
2009 328i

Buy what makes you smile...
Re: What could cause a decrease in oil consumption? [Re: MCompact] #5382472 03/21/20 09:56 PM
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Propflux01 Offline
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Sounds like rings got unstuck.


2014 Hyundai Elantra
2014 Hyundai Elantra GT
Re: What could cause a decrease in oil consumption? [Re: MCompact] #5382511 03/21/20 11:01 PM
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antonmnster Offline
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I had a lawn mower that I bought used that burned so much oil the yard would be a blue haze. But after running it for a summer of my yard - a half acre that was way too much for that little engine, but ran it at 100% for an hour per cut - it stopped using oil.

I think the last owner didn't change the oil that much and the rings are free.


2007 BMW 335i n54 218,000 miles, lubricated by whatever is on sale
Re: What could cause a decrease in oil consumption? [Re: MCompact] #5382519 03/21/20 11:14 PM
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rubberchicken Offline
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On the Mini - the valve cover does have an integrated PVC, but I thought that was just for the N14 engine. The valve cover is an expensive item, but it is a fairly easy replacement. Mini's are notorious as consumers of oil, and it is the rare engine that does not consume oil like a Saudi yacht. I am surprised you are not using 5w40 oil, as I believe Mini updated its recommendations . Try that and see if your oil consumption drops further.

My son has a 2009 Cooper S (turbo) and it uses a quart every 1000 miles. It is in rough shape now, and he decided to buy a 2020 Honda Accord Sport.

Re: What could cause a decrease in oil consumption? [Re: MCompact] #5382601 03/22/20 04:22 AM
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Olas Offline
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when the only variable is the oil, you have to assume that the oil caused the drop in consumption.


Cable ties should hold it
Re: What could cause a decrease in oil consumption? [Re: MCompact] #5382614 03/22/20 06:09 AM
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CourierDriver Offline
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With todays technology, no auto should have any oil loss issues, but we don't live in a perfect engineering world,,,imho


I'd still like to have my 67 Beetle back....life was easy then..imho 2 quarts of oil roughly ,lol
No matter what time it is,its always time for a nap
Re: What could cause a decrease in oil consumption? [Re: MCompact] #5382756 03/22/20 09:42 AM
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BAJA_05 Offline
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Why not throw some Kreen at that and see if it cleans things up for you moving forward?


2017 VW Jetta SE TSI 1.4L Turbo (hers)
PP Euro 0W40 & FU (42K)
2008 Acura TL 3.2L PPHM 0W20 & FU (117K)
2005 Subaru Baja AWD 2.5L N/A 5spd.
T6 MV 5W30 & FU (103K)
2000 Ram 4X4 5.2L (93K) T6 MV 5W30 & FU
Re: What could cause a decrease in oil consumption? [Re: rubberchicken] #5382761 03/22/20 09:49 AM
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Originally Posted by rubberchicken
On the Mini - the valve cover does have an integrated PVC, but I thought that was just for the N14 engine. The valve cover is an expensive item, but it is a fairly easy replacement. Mini's are notorious as consumers of oil, and it is the rare engine that does not consume oil like a Saudi yacht. I am surprised you are not using 5w40 oil, as I believe Mini updated its recommendations . Try that and see if your oil consumption drops further.

My son has a 2009 Cooper S (turbo) and it uses a quart every 1000 miles. It is in rough shape now, and he decided to buy a 2020 Honda Accord Sport.


I was coerced out of retirement so my goal is to keep the Clubman as my commuter car to the end of my term(December, 2024). I put approximately 6k miles per year on it so that means I just need to get it to 150k miles. I really like it and it makes the commute a bit more fun. If it was my only car and I had no option but FWD I'd get a Veloster N with the Performance Package.


Mine:
2014 M235i
2009 Cooper Clubman
1999 Wrangler Sahara
1995 318ti Club Sport

Wife's:
2015 X1 xDrive28i M Sport


Son's
2009 328i

Buy what makes you smile...
Re: What could cause a decrease in oil consumption? [Re: MCompact] #5382771 03/22/20 09:55 AM
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Triple_Se7en Offline
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Originally Posted by MCompact
Originally Posted by javacontour
How many miles on the car/oil now?

I've seen these where they are non-linear. I.E. the first quart may not burn off for 2000 miles. The next one in 1500, the next in 1000 and so on.

Until you go through a complete OCI, it's hard to say if the consumption you current experience is going to continue at the same rate.


121.8k miles on the car, 5.8k miles on the oil. As for oil usage during the current OCI, as I said, it varied from a high of 920 miles to a low of 790 miles for the first four top-ups. The fifth top-up at 121k was 1,494 miles. As noted, the car now has almost 122k on it and only 0.5 quart of oil has been consumed- so if anything oil consumption has decreased even more.

You did four top-offs using a total of a half-quart of oil? That's only four ounces average per top-off...... why?


Keep Your Pistons, Valves & Injectors Clean

19 Hyundai Santa Fe 2.4 GDI
20 Kia Soul XLine 2.0 MPI - both Pennzoil Ultra Plat. 5W30 / AC Delco PF1127 Ecores
04 Chev Colorado Napa Syn 0w20 & K&N



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