automotive lubricant additives

API CK-4 Heavy-Duty Diesel Engine Oil Additive Package

API CK-4 heavy-duty diesel engine oil additive packages are complete additive concentrates formulated for heavy-duty diesel engines equipped with advanced exhaust aftertreatment systems (EGR, DPF, SCR). These packages deliver improved oxidation resistance, shear stability, aeration control, and soot-handling dispersancy versus prior CJ-4 chemistry. They are designed for use with Group II and III base oils at 10–16% treat rate and must pass a demanding sequence of industry engine dyno and bench tests.

automotive lubricant additives

API SN/SP Passenger Car Engine Oil Additive Package

API SN/SP passenger car engine oil additive packages are complete, fully balanced additive concentrates designed for blending with Group II, III, or IV base oils to produce finished engine oils meeting the latest API SN Plus, SP, and ILSAC GF-6A/GF-6B specifications. These packages contain optimized combinations of detergents, dispersants, antiwear additives, antioxidants, friction modifiers, corrosion inhibitors, and foam suppressants. They are tested and approved against the latest ASTM and CEC engine sequences.

automotive lubricant additives

Alkylated Diphenylamine (ADPA) Antioxidant

CAS: 68411-46-1

Alkylated diphenylamine (ADPA) is a high-performance secondary aminic antioxidant produced by alkylating diphenylamine with olefins to improve oil solubility and reduce volatility compared to unalkylated DPA. ADPA provides superior high-temperature oxidation protection and is particularly effective in modern engine oils, aviation turbine oils, and high-temperature industrial lubricants. The C4–C9 alkyl substituents dramatically improve oil compatibility without sacrificing radical-scavenging activity.

automotive lubricant additives

Amine Phosphate Antiwear Additive

CAS: 61789-79-5

Amine phosphates are ashless antiwear additives formed by the neutralization of phosphoric or phosphorous acid with fatty amines, delivering effective wear protection without contributing zinc or other metals to the formulation. They are particularly valued in zinc-free hydraulic fluids, environmentally acceptable lubricants (EAL), and applications where ZDDP is restricted. Amine phosphates also provide rust inhibition and mild acid neutralization, making them multifunctional components in hydraulic and circulating oil formulations.

automotive lubricant additives

Aromatic Seal Swell and Conditioner Additive

Seal swell and conditioner additives are aromatic ester or polycyclic aromatic compounds used in lubricants to maintain the flexibility and dimensional integrity of elastomeric seals throughout service life. Without seal conditioners, elastomers can shrink, harden, and crack in synthetic or highly refined base oils, leading to oil leaks. These additives are essential in automatic transmission fluids, power steering fluids, and synthetic engine oils to ensure compatibility with NBR, HNBR, and PTFE seals.

automotive lubricant additives

Automatic Transmission Fluid (ATF) Additive Package

Automatic transmission fluid (ATF) additive packages are precisely balanced concentrates that deliver the complex combination of friction, anti-shudder, antiwear, oxidation stability, foam control, and seal compatibility properties demanded by modern automatic transmissions. These packages must simultaneously control static and dynamic friction coefficients with extreme precision to enable smooth clutch engagement and prevent lock-up clutch shudder. They are formulated to meet OEM specifications including Dexron VI, Mercon LV, and Toyota T-IV/T-V standards.

automotive lubricant additives

Barium Dinonylnaphthalene Sulfonate Rust Inhibitor

CAS: 25619-56-1

Barium dinonylnaphthalene sulfonate is a classical high-performance rust and corrosion inhibitor with exceptional water-displacing properties, used in protective oils, rust preventive compounds, and metalworking fluids. The barium salt form provides stronger adsorption on metal surfaces compared to calcium analogues and is particularly effective in humidity-cabinet and salt-spray testing conditions. It remains the benchmark rust inhibitor for long-term storage and preservation applications despite newer alternatives.

automotive lubricant additives

Calcium Complex Soap Grease Thickener

Calcium complex soap thickeners are produced by the co-crystallization of calcium long-chain fatty acid soaps with calcium acetate or calcium borate, creating a complexed crystal structure with a dropping point of 250–280°C — significantly higher than simple calcium soap. Calcium complex greases offer exceptional water resistance and adhesiveness, making them the preferred choice for steel mill, food-grade, and high-temperature applications where water contamination is unavoidable.

automotive lubricant additives

Calcium Petroleum Sulfonate Emulsifier for Metalworking

CAS: 61791-12-6

Calcium petroleum sulfonate emulsifiers are anionic surfactants widely used in soluble oil and semi-synthetic metalworking fluid concentrates to form stable oil-in-water emulsions with tap water of varying hardness. They provide simultaneous emulsification, mild rust inhibition, and lubricity enhancement. The calcium sulfonate structure offers superior emulsion stability versus sodium sulfonates, particularly in hard water conditions common in manufacturing environments.

automotive lubricant additives

Calcium Salicylate Detergent

CAS: 19825-98-4

Calcium salicylate detergent is an overbased metal detergent additive that provides excellent acid neutralization, antioxidant activity, and high-temperature deposit control in engine oils. The salicylate structure offers inherent antioxidant functionality through its phenolic moiety, differentiating it from sulfonate and phenate detergents. It is widely used in modern low-SAPS engine oil formulations (ACEA C1/C2/C3/C4) and has become the preferred detergent for stringent exhaust aftertreatment-compatible lubricants.

automotive lubricant additives

Chlorinated Paraffin Extreme Pressure Additive for Metalworking

Chlorinated paraffins (CPs) are among the most effective extreme pressure additives for heavy-duty metalworking operations including deep drawing, tapping, and gear hobbing, where contact pressures exceed the capability of sulfur and phosphorus-based EP additives alone. The chlorine content reacts with iron under tribological stress to form iron chloride low-shear films. Available in short, medium, and long chain lengths with 40–70% chlorine content, they are widely used in neat cutting oils and metalforming lubricants worldwide.

automotive lubricant additives

Colloidal Graphite Solid Lubricant Additive

CAS: 7782-42-5

Colloidal graphite is a suspension of ultrafine graphite platelets (typically 1–10 μm) in oil or water carriers, used as a solid lubricant additive in greases, cutting fluids, and extreme-pressure lubricants. The layered hexagonal structure of graphite provides excellent lubrication under high load and high temperature conditions where conventional lubricants fail. Graphite is particularly effective in open gear, wire rope, and high-temperature furnace applications where environmental contamination of PTFE and MoS2 can occur.

automotive lubricant additives

DEG Monooleate Corrosion Inhibitor for Metalworking

CAS: 141-20-8

Diethylene glycol monooleate (DEG monooleate) is a non-ionic ester surfactant used as a mild corrosion inhibitor, emulsifier, and lubricity additive in water-based metalworking fluids. Its dual hydrophilic-lipophilic structure adsorbs onto metal surfaces while maintaining miscibility with water, providing effective ferrous corrosion protection in diluted cutting fluids. DEG monooleate also acts as a coupling agent to improve compatibility between the oil and water phases in semi-synthetic fluids.

automotive lubricant additives

Dibenzyl Disulfide (DBDS) Extreme Pressure Additive

CAS: 150-60-7

Dibenzyl disulfide (DBDS) is a highly effective thermally active sulfur-based extreme pressure additive used in gear and metalworking lubricants. The benzylic C–S bond cleaves readily under tribological stress, releasing reactive sulfur that reacts with iron to form a low-shear-strength iron sulfide film, preventing seizure under high contact pressures. DBDS delivers excellent 4-ball EP performance and is commonly blended with phosphorus-based antiwear additives in GL-5 gear oil packages.

automotive lubricant additives

Dimercaptothiadiazole (DMTD) Metal Deactivator

CAS: 1072-71-5

2,5-Dimercapto-1,3,4-thiadiazole (DMTD) is a highly effective metal deactivator and copper corrosion inhibitor used in lubricants and fuels to prevent catalytic oxidation by copper and other transition metals. It forms stable chelate complexes with copper ions at ppm concentrations, passivating copper and brass surfaces and neutralizing pro-oxidant metal ions in solution. DMTD is essential in gear oils and engine oils that contact copper alloy components in gearboxes, bearings, and coolers.

automotive lubricant additives

Dinonylnaphthalene Sulfonic Acid (DNNSA) Rust Inhibitor

CAS: 57855-77-3

Dinonylnaphthalene sulfonic acid (DNNSA) and its calcium and barium salts are highly effective corrosion and rust inhibitors widely used in engine oils, gear oils, hydraulic fluids, and protective oils. The bulky naphthalene sulfonate structure forms a tenacious adsorbed film on metal surfaces that displaces water and inhibits both ferrous and non-ferrous corrosion. DNNSA is particularly valued in rust preventive oils and long-term storage lubricants where superior water-displacement is critical.

automotive lubricant additives

Diphenylamine (DPA) Antioxidant

CAS: 122-39-4

Diphenylamine (DPA) is a secondary aminic antioxidant that provides excellent protection against oxidative degradation in lubricants by scavenging alkyl and peroxyl radicals. It reacts with oxidation products to form stable nitroxide and carbocation intermediates that break the autoxidation chain. DPA and its alkylated derivatives are preferred antioxidants in high-temperature lubricants, turbine oils, and compressor oils where temperatures exceed the effective range of phenolic antioxidants.

automotive lubricant additives

Fumarate Copolymer Pour Point Depressant

Fumarate ester copolymers are non-PMA pour point depressants that are particularly effective in Group I base oils and paraffinic stocks where PMA performance is limited. They are also used as wax crystal modifiers in diesel fuel and middle distillate additives. Their mechanism involves co-crystallization with wax, preventing the formation of continuous wax networks that restrict low-temperature flow. These products are valuable as pour point depressants in residual fuel oils and heavy bunker fuel treatments.

automotive lubricant additives

GL-4/GL-5 Gear Oil Additive Package

Complete GL-4/GL-5 gear oil additive packages combine extreme pressure, antiwear, corrosion inhibition, foam suppression, and oxidation protection in a single blendable concentrate. These packages are formulated to meet API GL-4 (manual transmission and transaxle) and GL-5 (hypoid axles) specifications, ensuring passage of the CRC L-33, L-60, L-37, and FZG gear tests. They are designed for efficient blending with Group I, II, and III base oils at treat rates of 4–8% to produce finished automotive gear lubricants.

automotive lubricant additives

Gas Engine Oil Additive Package

CAS: N/A (formulated package)

Gas engine oil additive package formulated for stationary and mobile natural gas, CNG, LNG and LPG engines. Provides controlled sulfated ash content (low/medium-ash variants) to balance valve seat protection against ash-induced spark plug fouling. Delivers oxidation resistance for the high-NOx, dry combustion environment characteristic of gas engines. Richful RF6208 (medium-ash mobile long-mileage variant) is a typical grade for CNG truck and bus engines.

automotive lubricant additives

Glycerol Monooleate (GMO) Friction Modifier

CAS: 111-03-5

Glycerol monooleate (GMO) is a cost-effective, ashless friction modifier derived from oleic acid and glycerol, widely used in automotive and industrial lubricants to reduce stick-slip behavior and improve fuel efficiency. Its polar head group adsorbs strongly onto metal surfaces, forming a boundary-lubrication film that reduces the coefficient of friction in low-speed, high-load contacts. GMO is fully biodegradable and compatible with both mineral and synthetic base oils.

automotive lubricant additives

Hindered Phenol Antioxidant for Lubricants

CAS: 68411-46-1

Hindered phenol antioxidants are radical chain-terminating antioxidants that donate hydrogen atoms to peroxyl radicals, interrupting the autoxidation cycle and dramatically extending lubricant service life. Compounds in this class, including 2,6-di-tert-butyl-4-methylphenol (BHT) and high-MW polymeric hindered phenols, are used across engine oils, hydraulic fluids, and turbine oils. They synergize strongly with aminic antioxidants to provide balanced primary antioxidation at all severity levels.

automotive lubricant additives

Hydrogenated Styrene-Isoprene (HSD) Viscosity Index Improver

CAS: 9010-79-1

Hydrogenated styrene-diene (HSD) VI improvers are star-structured block copolymers offering superior oxidative stability, excellent low-temperature performance, and high thickening efficiency in a single additive. The hydrogenation step eliminates residual double bonds, greatly improving stability against oxidation and thermal degradation. HSD is the preferred VI improver for premium low-viscosity engine oils (0W-16, 0W-20) and modern transmission fluids that require extreme low-temperature cranking performance.

automotive lubricant additives

Isothiazolinone Biocide for Metalworking Fluids

Isothiazolinone-based biocides are the most widely used antimicrobial additives in water-miscible metalworking fluids, preventing bacterial and fungal contamination that causes fluid degradation, unpleasant odors, and health risks for machine operators. Blends of 5-chloro-2-methyl-4-isothiazolin-3-one (CMIT) and 2-methyl-4-isothiazolin-3-one (MIT) provide broad-spectrum efficacy against bacteria, yeast, and molds at low concentrations. Proper biocide management extends metalworking fluid service life and reduces disposal costs.