Ashley Lane employs what they call the "Diamond Film Technology." In layman's terms, the extra quality formulation contains a higher concentration of Zinc Dialkyldithiophosphate (ZDDP) and Molybdenum disulfide than industry averages. This creates a sacrificial layer on metal parts, meaning that even if the fluid film breaks down under extreme pressure, the solid additives prevent metal-to-metal contact.
Surprisingly, the "Extra Quality" variant has found a cult following among collectors of classic American muscle cars and vintage diesel trucks. Because it retains high zinc levels (often removed from modern eco-oils), it provides the flat-tappet cam protection that classic engines require. ashley lane oil tycoon extra quality
Many "premium" oils lose their viscosity after just 100 hours of heavy use. Independent tests on the Oil Tycoon Extra Quality blend show less than 5% viscosity loss after 250 hours of continuous operation in turbo-diesel applications. This longevity is the definition of extra quality. Ashley Lane employs what they call the "Diamond