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Home / Applications / Engine Oils / Heavy-Duty Engine Oil

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Heavy-Duty Engine Oil Additives

19 CheMost grades tagged for this application · Ashless Dispersants · Detergents & TBN Boosters · Viscosity Index Improvers · Antioxidants · Extreme Pressure Additives · Friction Modifiers

Additives for Heavy-Duty Engine Oil Formulation

CheMost supplies the individual additive components a formulator blends into a finished Heavy-Duty Engine Oil. The 19 grades below are tagged for this application from product data — only real, documented products appear here. Use the selector to narrow by specification and base oil, then request a sample or technical data sheet.

Tagged Products

Real, documented CheMost grades tagged for this application. Open a product for full technical detail, or request a sample.

Boron-Modified Polyisobutylene Succinimide
Ashless Dispersants

Boron-Modified Polyisobutylene Succinimide

Boron-modified (borated) polyisobutylene succinimide ashless dispersant — the standard-MW T1428B (1.0% B) and high-MW T1620B (0.95% B) — adding antioxidancy, antiwear and fluoroelastomer-seal compatibility on top of soot dispersancy for low-SAPS engine oils.

Calcium Alkyl Salicylate
Detergents & TBN Boosters

Calcium Alkyl Salicylate

Calcium alkyl salicylate detergent & TBN booster — a sulphur-free, single-surfactant detergent that combines high-temperature detergency, acid neutralisation and built-in antioxidancy, in a medium-base grade (CA165, TBN 175) and a high-base grade (CA265, TBN 280).

Ethylene-Propylene Copolymer (EPM) Viscosity Index Improver
Viscosity Index Improvers

Ethylene-Propylene Copolymer (EPM) Viscosity Index Improver

Solid ethylene-propylene copolymer (EPM) base polymer for viscosity index improvers — amorphous olefin-copolymer bales the blender dissolves in oil to make a custom OCP viscosity modifier, in a shear-stable low-Mooney grade (J0010) and a higher-thickening grade (J0050).

High Based Calcium Sulfonate
Detergents & TBN Boosters

High Based Calcium Sulfonate

High-base calcium sulfonate detergent, TBN 320 mgKOH/g with 12.5% calcium — high acid-neutralization reserve for extended drains, high-sulfur fuel protection, and hot-surface deposit control.

High Molecular Weight Phenolic Antioxidant
Antioxidants

High Molecular Weight Phenolic Antioxidant

Liquid high-molecular-weight phenolic antioxidant (AO135, CAS 125643-61-0) — a 100%-active, low-volatility hindered-phenol ester that controls deposits and piston cleanliness and protects long-drain TBN; recommended with the aminic AO57 (heterosynergism) in engine and industrial oils.

High-Molecular-Weight Polyisobutylene Bissuccinimide
Ashless Dispersants

High-Molecular-Weight Polyisobutylene Bissuccinimide

High-molecular-weight polyisobutylene bissuccinimide ashless dispersant — TBN 21 with 1.12% N, a large-PIB-tail grade giving superior soot dispersancy and high-temperature detergency for high-soot diesel engine oils.

Liquid Olefin Copolymer (OCP) Viscosity Modifier
Viscosity Index Improvers

Liquid Olefin Copolymer (OCP) Viscosity Modifier

Ready-to-blend liquid olefin copolymer (OCP) viscosity modifier — a polymer-in-oil concentrate that builds high-temperature viscosity and viscosity index, supplied in four shear-stability grades (SSI 20–45) from general multigrade thickening to severe-duty, stay-in-grade performance.

Methylenebis(dibutyldithiocarbamate)
Extreme Pressure Additives

Methylenebis(dibutyldithiocarbamate)

Ashless methylenebis(dibutyldithiocarbamate) (T7723, CAS 10254-57-6) — a metal-free sulfur–nitrogen extreme-pressure / antiwear additive (S 30%) that is also a secondary antioxidant, giving high-temperature oxidation and wear protection in low-phosphorus engine oils, gear oils, turbine oils and greases.

Friction Modifiers

Molybdenum Dialkyldithiocarbamate (MoDTC)

Phosphorus-free molybdenum dialkyldithiocarbamate (MoDTC, MO10S) — an oil-soluble organomolybdenum friction modifier, Mo 10% / S 11%, that decomposes to low-friction MoS₂ at the rubbing contact to cut the friction coefficient and add antiwear and antioxidant protection in fuel-economy engine oils.

Molybdenum Dialkyldithiophosphate (MoDTP)
Friction Modifiers

Molybdenum Dialkyldithiophosphate (MoDTP)

Molybdenum dialkyldithiophosphate (MoDTP, MO10SP, CAS 72030-25-2) — the classic oil-soluble organomolybdenum friction modifier, Mo 9.9% / S 12.65% / P 3.75%, that generates low-friction MoS₂ at high temperature to reduce friction and wear in engine oils.

Octylated Butylated Diphenylamine
Antioxidants

Octylated Butylated Diphenylamine

Liquid octylated/butylated diphenylamine (AO57, CAS 68411-46-1) — a high-nitrogen (4.58%) aminic primary antioxidant, TBN 198, that traps free radicals at high temperature and synergises with phenolic antioxidants and ZDDP in industrial, turbine, automotive and heat-transfer oils.

Friction Modifiers

Organomolybdenum Complex (S/P-Free)

Sulfur- and phosphorus-free organomolybdenum complex (MO60N) — an oil-soluble molybdenum-amine friction modifier, Mo 6.28% / N 1.83%, that forms a low-friction molybdenum tribofilm for fuel economy and antiwear in modern low-SAPS engine oils; works on its own or in synergy with ZDDP.

Overbased Calcium Sulfonate
Detergents & TBN Boosters

Overbased Calcium Sulfonate

Super-high-TBN overbased calcium sulfonate detergent — TBN 415 mgKOH/g with 15.85% calcium, delivering the maximum acid-neutralisation reserve per unit treat for heavy-duty diesel, marine and high-sulphur-fuel additive packages.

Overbased Magnesium Sulfonate
Detergents & TBN Boosters

Overbased Magnesium Sulfonate

Overbased magnesium sulfonate detergent — TBN 420 mgKOH/g with 10.0% magnesium, a high base reserve that leaves lower ash than the calcium analogue, suited to high-grade gasoline and gas-engine oils.

Polyisobutylene Bissuccinimide
Ashless Dispersants

Polyisobutylene Bissuccinimide

Chlorine-free polyisobutylene bissuccinimide ashless dispersant — available as the standard T1428 (TBN 28, 1.25% N) and the high-nitrogen super grade T1428S (TBN 80, 3.2% N) — dispersing soot and sludge to control deposits, wear and viscosity growth.

Polyisobutylene Monosuccinimide
Ashless Dispersants

Polyisobutylene Monosuccinimide

High-nitrogen polyisobutylene monosuccinimide ashless dispersant — TBN 48 mgKOH/g with 2.1% nitrogen, a chlorine-free single-succinimide grade for strong low-temperature sludge and varnish control.

Sulfurized Calcium Alkyl Phenate
Detergents & TBN Boosters

Sulfurized Calcium Alkyl Phenate

High-base sulfurized calcium alkyl phenate detergent — TBN 265 mgKOH/g at 9.85% calcium, whose sulfur-bridged phenate structure delivers high-temperature acid neutralisation plus oxidation resistance and pairs synergistically with calcium sulfonate in turbocharged HDEO, marine cylinder and gas-engine oils.

Engine Oil Additive Packages

Universal Engine Oil Additive Package (SL/CF)

Universal engine oil additive package for both gasoline and diesel crankcase oils, TBN 117.5 mgKOH/g with 0.17% molybdenum — one DI package covering API SL/CF/CF-4 down to SF/CC at 3.0–6.8% treat.

Zinc Dialkyldithiophosphate (Primary Alkyl)
ZDDP & Antiwear Additives

Zinc Dialkyldithiophosphate (Primary Alkyl)

Multifunctional primary-alkyl zinc dialkyldithiophosphate (ZDDP) antiwear additive — antiwear, antioxidant and corrosion protection for engine, hydraulic and gear oils and greases, in a standard (SPZS-S1) and a long-chain, hydrolytically stable (SPZS-L1) grade.

Related Tools

Free ASTM-method calculators for sizing this chemistry into a formulation.

TBN Contribution CalculatorEstimate the base number a detergent contributes at a given treat rate.Treat Rate CalculatorConvert between wt%, ppm and kg per tonne for any component.

Building a Heavy-Duty Engine Oil? Tell us your spec.

Give us the specification you must meet and your base oil, and our technical team will recommend the components and treat rates, then send the TDS, SDS and a sample.

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