[Paul E]

Take an oil sample and send it in. The results will tell you more about if something is rubbing than most other things. cost is likely under $30. Make sure to take mid stream

[Sirrotica]

Originally Posted by Paul E

Take an oil sample and send it in. The results will tell you more about if something is rubbing than most other things. cost is likely under $30. Make sure to take mid stream

This is probably a pretty good idea to find out if there is metal circulating in the oil and what type of metal it is. If nothing else it will give anyone tearing into the engine an indicator of where to look.

From Blackstone Labs how oil analysis can show a problem before it becomes a larger problem:

Are you changing your oil often enough? Too often? Is synthetic oil really worth it? When it comes to the engine, it can be hard to know what’s going on without tearing it down…until now.
Oil analysis can identify any problems developing long before they cause you an expensive headache, and provide lots of other information too. Can you run the oil longer than the manual says? Will one brand of oil perform better than another? Is there any contamination in the oil? Are your oil and air filters doing a good job? An oil analysis can answer these questions and more. Let hard data tell you what you need to know about what’s going in inside your engine. Request your free test kit today!

Under their spectroscope even metal particles smaller than can be seen with the naked eye show up and are identified to what type of metal is wearing and how much metal is in the oil compared to normal traces from wear within normal circumstances.

Link to Blackstone Labs in Fort Wayne Indiana:

https://www.blackstone-labs.com/

For roughly $30 it can be a very good diagnostic tool in this case.