Ok where can I buy the kit to send in my engine oil for testing?
Any CAT dealer and most dealers have their own lab on site,if you are home in Az Empire CAT will have the suction pump,tubing,bottles and labels
I 2nd the cat dealer as that is where I get mine done
Some of the bigger oil wholesaler's offer oil testing. I have used Cat a lot over the years and liked there service.
I continue to use Blackstone Labs only because they did my first three and have the basis to compare to from the others.