PCM ZR6 2007 huge oil consumption

[Frank10]

My engine burns or leak 1 liter of oil in 6 hours, compression on all pistons are ok, we changed the valve seals, no clue!

Any ideas?

Tks!

 

[makomark]

If there is no oil under the engine, it's most likely going out the exhaust. If you don't smell the odor of burnt oil in the exhaust with the engine running (at operating temperature), it could be the oil cooler is starting to fail...

 

[Frank10]

No oil under the engine, light amount of smoke, not for the kind of oil loss at least, I will immediately check your suggestions
Tks!!