Just like the old Castrol GTX ads, you want to avoid viscosity breakdown because when your viscosity breakdown, your engine can breakdown.

Viscosity is the most important characteristic of a lubricant, and there is a direct correlation between viscosity and wear - when viscosity breaks down, wear increases. We've demonstrated that in our past two videos:

20W-50 vs 5W-20: Which Oil Protects Better?
   • 20W-50 vs 5W-20: Which Oil Protects Better?  

What Adding BOOST Did Do To Our Motor Oil (NA vs BOOST Test)
   • What Adding BOOST Did Do To Our Motor Oil ...  

We also see that in the thousands of used oil samples we've analyzed. But here's the thing, not all oils shear and breakdown the same. Some oils breakdown quickly and significantly, but other oils barely breakdown. In this video, we will demonstrate viscosity breakdown in the lab, and show you the results.

For more about Oil Analysis, check out: www.speediagnostix.com/

For a deeper dive into the science of lubrication, check out my good friend Rafe Britton's channel ‪@LubricationExplained‬

To learn about viscosity grades, check out this video:    • The "W" DOESN'T Stand For WEIGHT! A Certif...  

To learn more about my dad, check out his interview with Dale Earnhardt Jr:    • How Lake Speed's Journey Went From Karting...  

Who is the ‪@themotoroilgeek‬ ? I'm a Society of Tribologists and Lubrication Engineers Certified Lubrication Specialist and Oil Monitoring Analyst (I've maintained both of those for over a decade). I also worked for Joe Gibbs Racing for 12 years as their lubricant specialist. During that time, we worked with Wix Filters (one of our sponsors) to test and develop filters for our race engines. We also worked with Lubrizol and Chevron-Phillips Chemical to test and develop oils for our race cars. Following that, I was the head of R&D for Driven Racing Oil. During that time, I formulated and tested over 50 products. We also worked with Cummins, Comp Cams, Oak Ridge National Labs and General Motors on various R&D products. Those efforts are recorded in peer reviewed white papers published by SAE International and ACS Sustainable Chemistry journals. I also own and operate SPEEDiagnostix, which provides used oil analysis.

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