Motor Milk™: Industry-Leading HTHS Performance

Motor Milk™: Verified HTHS Performance for Demanding Conditions

At Motor Milk™, our goal has always been to create lubricants that people can rely on when engines are pushed to their limits. We are pleased to share the newly published HTHS (High-Temperature High-Shear) viscosity values for our 10W-60 racing oil, confirmed at over 6.1.

This figure represents more than a laboratory number. It highlights the level of protection and stability that our oil provides under extreme conditions, something that racers, engine builders, and performance enthusiasts can appreciate.

Why HTHS Matters

HTHS viscosity measures an oil’s ability to maintain a protective film when both heat and mechanical stress are at their highest. In racing and other demanding applications, this is exactly where engines need it most.

High RPM, High Heat, High Load: At over 6.1, the HTHS value of our 10W-60 demonstrates its ability to resist thinning and maintain critical protection under severe operating conditions.

Extreme Performance Applications: A higher film strength provides stability beyond typical industry levels, supporting durability in environments where failure is not an option.

Confidence in the Red Zone: This isn’t only about preventing wear. It’s about ensuring the engine can keep performing consistently when under maximum stress.

Independent Validation

These results were not only confirmed in-house but also independently validated by SPEEDiagnostix and Lake Speed, Jr., a respected figure in lubricant performance testing.

Lake Speed, Jr. brings decades of motorsport experience along with professional certifications as an STLE CLS (Certified Lubrication Specialist) and OMA I (Oil Monitoring Analyst I). His involvement provides additional reassurance that these results are accurate and trustworthy.

Transparency Across Our Range

We believe that trust is earned by being open. That is why the HTHS values for every Motor Milk™ formulation are now listed on the product sheets of all our oils.

In addition to HTHS, we also publish SAP and ZDDP content, details that are not always shared by manufacturers. We want our customers to have clear, accessible information when selecting the right oil for their needs, whether it is our flagship 10W-60 or another blend designed for specific applications. Check the spec sheet of your viscosity of choice:

• 5W-30
• 5W-40
• 5W-50
• 10W-60

Our Approach

Our philosophy is simple: provide products that offer genuine protection and proven performance.

High film strength: Safeguards engines under severe conditions.
Thermal and shear stability: Developed for sustained high temperature and high load environments.
Independent validation: Third-party testing supports our claims.
Open data: Published specifications across our entire range.

In Summary

With an HTHS value above 6.1, Motor Milk™ 10W-60 offers strength and reliability in some of the most demanding conditions engines face.

It is not about being the loudest in claims, but about proving performance through data and validation. That is the standard we hold ourselves to, and the assurance we want to provide to every Motor Milk™ customer.

Motor Milk™. Because performance deserves proof.