So my wife's Octavia has some serious problems.

I was driving the car and then something happen and I am seen a big cloud of smoke behind the car and the car lost power. Now sometimes when I need more power from the car, it leaves a cloud of white - blue smoke from the tailpipe. It does not do this if revved while parked.

I have checked the oil level right starting the car that day, it was at the maximum level. After 24km, the oil level dropped 5mm or so on the dipstick so it consumed a lot.

 

The car has 187000km on the odometer, is from 2002 and it was consuming about 1l of oil / 1000km at this point.

 

I went to the garage I usually service my cars, they don't know what the actual problem is. I'm a bit lost.

Check that the oil breather isn't blocked which would pressurise the crank case blowing oil past seals - eg possibly valve seals.

 

This happened with my 1.4 MPI a few years ago and oil consumption went through the roof - A hard pipe within the air filter that formed part of the engine breather was blocked with white oil gunge. I cleared it out and all was well afterwards (and still is under the new ownership of my son)  - although I do give the same pipe a flush out every couple of years.

 

I think the 1.6 has a PCV valve that could also fail and cause similar issues (my 1.4 has a "module" on the back of the engine that can also block)

 

Edited 22 October, 20196 yr by bigjohn

So the engine was already open by the time I read your post, however it seems that the engine was way older than 187000km because the wear inside was way higher compare to what would be normal for this age. One piston was missing parts if it and the piston rings were locked on 2 out of the 4 cylinders.

New pistons with rings, new other components that I don't recall at the moment and the engine is alive again. I did not have enough time testing it, but it seems that the engine has more power, especially in the low RPM and sounds different. I will drive it more tomorrow and make sure it's all good.