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Oil & Engine Additives

Please Never Use These 5 Additives! Major Engine Damage! (Sand vs Anti-Seize Test)

Apr 2026/14 min/2 products tested

Watch the test ↗

The verdict

He didn't give an outright ranking in this one — the full tested list is below.

Other picks

  • Avoid

    Valve Grinding Compound

    “Without a doubt, valve grinding compound is by far the most destructive additive yet.”
    Buy ↗
  • Also noted

    Anti-Sieze Compound

    “Clearly, anti-seize is the least destructive additive yet.”
    Buy ↗

Everything tested 2

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