Do Older Engines Need Oil With ZDDP Additives? John Baker|Nov 24, 2021 8:00 AM Using a high-zinc oil with a high dose of ZDDP additives helps protect classic car and hot rod engines. AMSOIL Z-ROD® Synthetic Oil contains 1,400 ppm zinc. Read More
Break-In Oil: What is it and When Do I Use it? John Baker|May 26, 2020 8:00 AM Break-in oil seals the piston rings to the cylinder wall for maximum power and minimum oil consumption. Here’s how it works and when to use it. Read More
