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An oil additive that adds required zinc to modern oil that is needed for “Flathead” motors. Use 1 bottle at each oil change. 1932-53. Must be shipped ground within the U.S.A. Not available to ship overseas. OIL-ZDD Sold as each. 4 ounce bottle.
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🇺🇸 Ship from USA · On Agora since 2025
$12.95