My oil looked good running out of the drain during each change. I wasn't aware of the engine problem before it happened to me. So, in my case, it was unpreventable. There was no way I knew to have the oil tested for unseeable particles. With that said, anyone who now has the knowledge of the engine failures should probably get their oil tested. It's not something that my dealer would've even done though and I'm not sure there are alot of shops that could even perform those kind of tests. So now it comes down to---where can someone get those kind of tests performed??