Zplus brand premium ZDDP Zing engine oil treatment. For restoring Zinc protection to modern engine oils when used on older vintage, historic or racing vehicles. 4oz bottle, treats 4-5 quarts of oil. Two bottles needed per service on most air-cooled Porsche engines. Ideal for most 911, 930, 964 and 993 vehicles.
Please note: Intended for use on pre-OBD off-road and racing vehicles. Not for highway use.
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