Oil/fluid testing company

[Scottro]

Does anyone know if Apex Oil Labs in Michigan is a reputable company?

 

[darsben]

The gold standard for testing seems to be at least in my mind,

Blackstone Laboratories

Learn what's going on in your engine with oil analysis. Our free kits are easy to use and we explain the results in plain English!

www.blackstone-labs.com

 

[Gary RV_Wizard]

I mostly used Blackstone and very pleased. Have also used JG Lubricant Services. The results from JG are just as good, but the service always ended up being more expensive.