Without adequate zinc levels, the base oil film can shear, causing the tappet face to gall or weld to the cam lobe. Regular oil changes according to the manufacturer's recommendations, or more frequent intervals for severe service, are essential to maintain adequate zinc activity and ensure continued protection.
Understanding High Zinc Motor Oil Replacement Interval Timing
Unlike roller followers, flat tappets rely on a sliding motion that generates significant sliding friction. This is especially important during the break-in period, where controlled wear is necessary to seat rings and polish surfaces, but uncontrolled wear must be prevented.
This specialized formulation contains elevated levels of zinc dialkyldithiophosphate (ZDDP), an anti-wear additive that creates a sacrificial layer between moving metal components. The zinc additive ensures that the boundary lubrication phase does not result in catastrophic failure.
Determining the Right High Zinc Motor Oil Replacement Interval
Racing formulations with elevated zinc content provide a safety net that allows components to survive the brutal conditions of track use. The extreme loads experienced during rapid acceleration, hard cornering, and high-RPM operation push lubricants to their limits.
More About High zinc motor oil
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