We’ll discuss ZDDP in more detail in the Additives section. ZDDP isĪlso the most well-known additive, as it is both erroneously vilified for ruining catalytic converters and O2 sensors, and celebrated for keeping flat-tappet engines alive. Zinc dialkyldithiophosphate (ZDDP) has been used for years as an affordable anti-wear, extreme-pressure, antioxidant additive. Mineral Oil Rotational viscosity standards are specifically formulated for use with rotational viscometers and are dual-certified to ISO 17025 and ISO 17034 under UKAS.They are especially needed in Group III and Group IV oils, which are known Seal conditioners are esters that keep seals pliable.Rust/corrosion inhibitors attach to, and protect, engine metals like iron from acid-, oxygen-, and water-based corrosion.PPDs aren’t usually needed in PAO- and ester-based oils, as they don’t contain wax. Pour-point depressants keep the trace amounts of paraffins in oil from growing crystals.Inorganic Friction modifiers are molybdenum compounds. Organic friction modifiers are typically esters or glycerol mono-oleates (GMO). Friction modifiers are molecules that, thanks to their polarity, attach to an engine’s metal surfaces to improve lubricity.Not surprisingly, they’re one of the main components of a DI pack. As those pieces would otherwise end up as engine sludge, dispersants are kind of a big deal. Dispersants suspend and disperse the solid pieces left over from the combustion of fuel.Browse Mineral Oil Rotational Viscosity Standard and related products at MilliporeSigma. Integrity and quality have and always will be at the forefront for Paragon. Mineral Oil Rotational Viscosity Standard. ![]() ![]() Diluent oil, or carrier oil, is a mineral oil that helps the solubility of the additives, and ensures that the viscosity is in the correct range for pumping and blending. Paragon Scientific, a trusted producer of premium quality reference materials since 1994, joined the LGC family in 2021, strengthening the global reference material offering for both businesses through strongly complementary product portfolios.Common metal atoms used include calcium, magnesium, and sodium common organic products include salicylates, sulfonates, and phenates. Detergents are metals and organic chemicals that clean engine deposits and neutralize acid byproducts from combustion.Antioxidants like amines and phenolics help fight oxidation, a reactive process that can create carbon deposits in an engine.Anti-foams are non-soluble silicone molecules that help prevent oil from foaming, and also help disperse foam that’s already formed.
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