[BMRLVR]

I agree with most of what is said in this thread with the exception of the recommendation to stay with the 10W60. I honestly think that the 10W60 may be a contributing factor to the bearing wear on daily driven cars. Every time the car is started with 10W60 oil that is 150F or less the bearings are starved for oil on the initial startup and until operating temperature is reached. A lighter oil isn't a fix but it is definitely a way to prolong the life of the bearings!

As for replacing bearings as a maintenance item, I think that is ludicrous. If you have no bearing issues with your engines, leave them alone, if you do have issues, take the time to do the repair right by sending the crank out and having the journals sized. This way you won't have to replace bearings sometime in the future since the actual problem causing the wear would be corrected!

My $0.02!