Why Old Engines Need Zinc Additives for Proper Protection

Discover why zinc additives are essential for old engines, ensuring longevity and optimal performance.

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Old engines require zinc additives because they lack modern roller cams and lifters, relying on flat-tappet cams which need extra protection. Zinc additives, known as ZDDP (Zinc Dialkyl Dithiophosphate), provide a crucial protective layer to reduce wear and tear on these components, extending engine life and performance.

FAQs & Answers

  1. What is ZDDP and why is it used in engine oil? ZDDP (Zinc Dialkyl Dithiophosphate) is an additive that provides anti-wear protection for engines, especially old engines with flat-tappet designs.
  2. How often should I add zinc to my engine oil? The frequency will depend on your engine's usage, but regular checks, especially during oil changes, are recommended.
  3. Can modern oils be used in older engines? Modern oils may lack sufficient zinc for older engines, so using oils formulated for classic cars or adding zinc additives is often advised.
  4. What are the signs that my engine needs zinc additives? Signs include increased engine wear, noise, or poor performance, particularly in older engines relying on flat-tappet cams.

Watch More

For further insights on maintaining your classic vehicle, check out our videos on essential oil types and maintenance tips for vintage engines.

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