Using engine oil

[Vijay]

Hi anyone who's still around lol

Getting totally fed up with my 2004 Skoda Octavia using engine oil. Going through around 300ml every 120 miles (sometimes less). It's smoky on start up too which is never good for anyone around. Drives well though, no noticeable loss of power.


Just wondered if anyone knows of anything I could look for or test I could do to determine the issue? What would a compression test tell me, leaky rings?

Worth running steam into the intake?

Do the elephant mod?  https://www.briskoda.net/forums/topic/100913-diy-guide-the-elephant-hose-ccv-catch-can-mod

[RichardP]

What engine is in it? How smokey is it on start up?
If you take the oil filler cap off when it's running is it blowing out a lot like the crankcase pressure is higher than it would normally be?

[nigelb]

Compression test could give you a false positive. Lack of compression could be a valve seat issue as well as rings. Having said that, it will  confirm an issue.

[Tony]

Really depends where the oil is going - could be a turbo seal, worn valve stems, gasket, piston rings...  Does it smoke badly if left at idle for a bit and then revved? This might indicate a turbo seal.

A good steaming or water injection wouldn't do any harm if the rings are getting gummed, that's for sure.

[Vijay]

What engine is in it? How smokey is it on start up?
If you take the oil filler cap off when it's running is it blowing out a lot like the crankcase pressure is higher than it would normally be?

Smokes like a goodun, could be the veg oil though.

It does blow out of the filler cap when it's off, but I really don't know what's normal

[Vijay]

Really depends where the oil is going - could be a turbo seal, worn valve stems, gasket, piston rings...  Does it smoke badly if left at idle for a bit and then revved? This might indicate a turbo seal.

A good steaming or water injection wouldn't do any harm if the rings are getting gummed, that's for sure.

Turbo was changed a few years back and it did the same before and after the replacement turbo. Could obviously have been a faulty replacement turbo though.......

[Head Womble]

As Tony has said, does it smoke more if left to idol for a while, this could indicate turbo or valve steam seals.
A compression test will show a lot, if it's low (do this one cylinder at a time)add 10ml of oil into a cylinder and test again, this will seal around the rings and show if it's rings or valve that's causing the loss of compression, yes it'll smoke when you do start it later, but it's doing that anyway.