Where can you send engine oil samples?
 

i heard from somewhere that you can actually take a sample of your engine oil and send it to a lab to be analyzed to see if your oil is actually breaking down @ 3000 miles or not...

where and for how much can you do this?

Many options, this thread will give you some insight:
https://www.rx8club.com/tech-garage-...m-here-184241/