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...
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...