engine cylinder head gasket

[Qian Qian <qqian@pppl.gov>]

My car is leaking engine oil from engine cylinder head. I had the gasket
replaced two years ago and was told at that time that it won't leak
any more. But it began leaking again. I asked the mechanic who did
the job what to do about it. He told me it's common for an old car and
suggested me add engine oil from time to time instead of replacing
the gasket again. I kind of doubt about what he said and thinking that
the proper installation of a gasket will definitely stop leaking.
However, since I know little about cars, any advice/experience is
needed from net gurus. If my guess is correct, I would ask either
audi dealer or other mechanic to put a new gasket on. It's annoying
to add engine oil from time to time.
Thanks.

Qian  85' 4000s