Car : 3.2 MV6 196K
Rocker Gaskets replaced last summer at about 183K with genuine parts.
Proper cleaned out breather tubes on top of engine. .
Oil changed at 193K with genuine GM Fully Syth and Filter. (Cast Housing)
No leaks until 3 weeks ago. Started small, I always check the oil before a long journey (and I do a lot of them) and I've been adding a bit more often but now on Thursday I had to top up after 100 miles into a Journey, and Then again 80 Miles later (on Sunday) and again this morning at 70 miles into a Journey, AND then another 70 miles this afternoon, and now 70 miles on it needs more. I calculate about 6 litres for about 450 miles. That's a lot of rust proofing on the exhaust and lots of it on the floor.
I've not had it up on the ramps, (as Snow and rain and doesn't fit in my garage) but had it running and had a look at the filter housing area, and seems to be pouring down the back of the engine.
At first I wondered if the little wiring plug next to the Oil Filter Housing is likely to leak? but seems to be above that. (Car is too low to see without ramps)
When the Rocker gaskets were leaking before it was all very slow. Yes there was an advisory on the MOT, but nothing like this.
And it hasn't been leaking in at least 12K since I did them.
So what are we thinking ?