Quote Originally Posted by Jack B View Post
A couple of thoughts:

1. There is no direct correlation between scored cylinder walls and and a R28 positive.

2. The cylinder walls typically are scored by lack of oil.

3. It is a stretch to go from scored cylinder walls to bearing failures.

4. The R28 probably is looking for aluminum or babbitt material, not necessarily machining debris.
The relation between scored cylinder walls and spun bearings are a matter of how often oil levels are checked, having a consumption issue vs not having consumption issue and frequency of oil monitoring