Advanced oils, lubricants and treatments since 1887
A frequently asked question our Technical Team receives is: “What is the effect of ZDDP on my Vintage and Classic vehicle?”.
It is one of the most misunderstood topics around oils for vintage and classic vehicles. To dispel any myths, we answered some questions to find out what ZDDP is and what it does to your engine.
Developed during the early 1940s, Zinc Dialkyl Dithiophosphate or ZDDP was the original engine oil multi-functional additive that provided anti-wear, anti-corrosion, anti-oxidant, and mild extreme pressure (EP) performance. It provides a chemical protective film on metal parts and is ideally suited to protect high-load contact points such as camshaft lobes, followers, and other areas of the engine where metal-to-metal contact is prevalent.
Whilst modern engines have developed alternative ways, in classic engines especially, it is absolutely critical that anti-wear additives are working to protect the engine’s moving components. Without the correct amount of ZDDP, and because of how important these components are, the engine can experience premature wear and could run poorly.
Millers Oils recommends an optimum amount between 1000 – 1400 ppm of ZDDP. Too little won’t offer enough anti-wear protection, and too much will not provide increased levels of protection, but can actually create friction and increase wear due to the ‘over-plating’ of components. In addition, high levels of ZDDP in an oil can harm emission control devices such as catalytic converters.
Our in-house Technical Support team are always happy to discuss any further questions you have.
Call our technical support team on: 01484 475060
Or e-mail them at email@example.com