Monthly Archives: June 2018

  • What is an "HFRR" number and why does it matter?

    At Opti-Lube we speak to some who are unaware of what an HFRR number is. On the home page of Opti-Lube.com you can see our performance table where this number is posted for each of our blends. Well, what is an HFRR number and why does it matter? Many have...

1 Item(s)