Rolex movements/servicing queston

[warrior]

Occasionally, I'll read on various forums of how so and so didn't require a service on his Rolex for 10, 15, 20 years.

Do Rolex movements require less servicing than, say, ETA based watches? I've read that it is simply based on oil and that all oil dries up after 5 years or so....and that parts wil begin to wear out. Regardless of movement or brand.

Are Rolex movements 1) more robust and/or 2) require less lubrication than the ETA movements? Or is this all a myth? Do all mechanical watches, regardless of brand or mechanical movement, have the same basic recommended service intervals?

Please discuss. Thanks....