k12 1.0 2003

Hi guy.

I have a Micra k12 1.0 2003.

I have an issues with the car it is losing oil i have checked for oil leaks around the engine i even pressure washed the engine had another look under and over jacket up the car the full lot not one oil leak .

took off the throttle body plastic part i saw oil in the intake manifold

took out the spark plugs no oil on all 4 plugs

Did a head gasket check came back blue so all is good

I'm starting to think its valve seals ????

I lost 1L of oil over two weeks

as anyone came across this before