ZDDPPlus ZDDP Engine Oil Additive Zinc & Phosphorus 5 Bottle Pkg

ZDDPPlus ZDDP Engine Oil Additive Zinc and Phosphorus is a well-reviewed product that provides metallic lubricant to older engines that require Zinc-containing molecules as protective lubricant. The product contains 4 ounces of additive per bottle, and one bottle should be mixed with 4-5 quarts of oil. It is essential to note that the additive should be used for engines without catalytic converters. The shelf life of the ZDDPPlus additive is like regular motor oil and can be kept for many years if stored under the right condition. It is recommended to keep it sealed until mixed with motor oil, and the temperature should be kept below 120 degrees Fahrenheit and above 0 degrees Fahrenheit. However, it tends to absorb moisture that will degrade its performance. Customers have stated that the product works well as designed, and serves its purpose. While some customers mix half a bottle per oil change, others prefer to use the whole bottle per oil change. However, the bottle instructs not to save any excess, and the entire content should be used before disposing of the empty bottle.