[arucano]

It's advisable to do an oil analysis every few oil changes to determine whether anything is going wrong. It can put your mind at rest or provide timely warning if anything is going wrong before it escalates into a major rebuild. Regular oil changes with the correct oil is critical to the life of the engine and your peace of mind. The bearings in these engines are not a major problem area AFAIK.
What is also important for the bearing life is allowing the engine to warm up properly before going full power.