Chevs of the 40s » Chevy Parts » Car Care » Tools » Item #ZDDPLUS Zddplus Oil Additive, 4oz. Bottle Item # ZDDPLUS DON'T LET THIS HAPPEN TO YOUR ENGINE! ZDDPLUS is an oil additive that contains very high concentrations of the well known additive ZDDP (Zinc Dialkyl-Dithio-Phosphate) which has been the primary EP (Extreme Pressure) ingredient in all quality motor oils for over 70 years. The EPA has put stricter emission requirements on new cars, which have influenced manufacturers to remove ZDDP from motor oils. If you have an older car/ engine that was specified to use S.F. or earlier motor oil and flat tappets, its design requires ZDDP. Your engine could be damaged with the use of modern SM oils. Typical shelf life is same as regular motor oil (many years). Storage temperature should be kept between 0 and 120 degrees F. Also works with synthetic oils. For more details click here... No international shipping. Ground domestic shipping only. This part fits most Cars and Trucks.; exceptions may apply. Please read the complete description to see if this part fits your specific vehicle and application. NOTE! This item is restricted to ground shipments only! Only Continental USA destinations are permitted to order this item. Do not order if your address is international or requires a ship method other than ground! Price: $12.00 Each Qty: Add to Cart This product can expose you to a chemical, which is known to the State of California to cause cancer or reproductive harm. For more information go to www.P65Warnings.ca.gov CA Prop 65 Warning This product can expose you to a chemical, which is known to the State of California to cause cancer or reproductive harm. For more information go to www.P65Warnings.ca.gov Reviews There are no reviews at this time Login to Write A Review Fits Vehicle Models Product Fits Vehicle Models There are no specific vehicles models specified for this part.