ok thanks steve.

i thought possible worn rings or bores as my engine is thowing out white/grey smoke when warm and smells of oil.

done a leak down test and its saying cylinder leakage moderate 65% on all cylinders.

also tryed just useing 100psi of air i hear the air escaping out of the engine dipstick & oil cap.

this would suggest Rings/cylinder seal.

however the compression reading on all cylinders do look all close together so i think maybe the rings are ok.

im thinking maybe valve stem seals. however im not sure if worn valve stem seals would cause blowby in the crankcase.