sorry guys for such long period of time for responding.
the bad news is: car is still dropping oil on floor WHEN IDLE not when driving and some oil leaking spots on breather pipe and oil reduction after a few hundred KMs.
the good news is: I HAVE NOT DONE A SINGLE TOUCH to my engine, not by mechanic, not by me. just oil change and filters change. thats all and car is still running perfectly.
SO, i am not changing engine, not going for overhual or piston rings upgrade.
BECAUSE, i learned that no matter how good your mechanic is, how many NEW OEM parts you put into it, you still cant match with original factory fitting of engine and gearbox (specially if it is automatic).
MY ADVICE: if you have a old diesel car and it is throwing blow from oil cap, dip stick, breather pipe... let it be. it does not reduce power.
if car is throwing exessive black smoke from tail pipe (silencer) get your silencer cleaned with CASTIC SODA (do not let anyone cut open silencer). second, have your fuel injectors nozzles cleaned up AND DO NOT EVEN TOUCH DIESEL INTAKE PUMP (advance or retire injection pump).
do this and you can run 2c diesel engine for 100 years