- Lubricant additives are the chemistries blended into a base oil to control wear, oxidation, deposits, friction, foam and corrosion — together they make the finished lubricant.
- The core functional classes are antiwear/EP, detergents & dispersants, antioxidants, friction modifiers, viscosity & pour-point modifiers, corrosion inhibitors and solid lubricants.
- Select by the duty (engine oil, grease, metalworking, gear/hydraulic), the base oil, and the performance target; the Certificate of Analysis governs.
A finished lubricant is a base oil plus an additive package. The base oil carries the load and transfers heat; the additives do the protecting — laying down antiwear films, neutralizing acids, dispersing soot, slowing oxidation and keeping steel from rusting. RawSource supplies the building blocks of that package — antiwear and EP additives, detergents, solid lubricants, friction modifiers, base oils and thickeners — in bulk and to specification.
What are lubricant additives?
Lubricant additives are functional chemistries dosed into a base oil, typically from a fraction of a percent up to ~20% of the finished fluid for a heavy-duty engine oil. Each class addresses a specific failure mode — metal-to-metal wear, high-temperature oxidation, acid buildup, soot, friction, foam, or corrosion — and a real formulation balances several at once, because additives can compete for the same metal surface.
The functional classes
| Class | Job | Representative chemistries |
|---|---|---|
| Antiwear / EP | Protect surfaces under boundary and extreme-pressure contact | ZDDP, tricresyl phosphate, molybdenum disulfide |
| Detergents & dispersants | Neutralize acids, keep soot and deposits suspended | Overbased calcium sulfonate |
| Friction modifiers / solid lubricants | Lower friction; carry load where films break down | MoS₂, boron nitride, PTFE, graphite, glyceryl monooleate |
| Corrosion / rust inhibitors | Protect ferrous and yellow metals | Calcium sulfonate, phosphonates, azoles |
| Base oils | The carrier fluid (mineral, synthetic) | PAO (synthetic), naphthenic and paraffinic oils |
| Grease thickeners | Gel the oil into a grease | Lithium/calcium soaps, calcium-sulfonate complex |
How to select an additive system
- Match the duty. Engine oils lean on ZDDP antiwear plus overbased detergents; greases need a thickener plus EP and rust protection; metalworking fluids prioritize EP, lubricity and corrosion control.
- Match the base oil. Synthetic PAO runs cleaner and wider-temperature than mineral oils; additive solubility and seal compatibility differ by base stock.
- Balance the package. Antiwear, detergent and friction-modifier chemistries compete for the metal surface — the right ratio, not the highest dose, gives the best result.
- Confirm compatibility & compliance. Verify additive interactions, seal compatibility and any regulatory requirements for your application.
Lubricant additives and base oils we supply
Building blocks across the functional classes. Confirm grade, active content and form on the purchase order.
By application
Frequently asked questions
What are the main types of lubricant additive?
The core classes are antiwear and extreme-pressure additives (e.g. ZDDP, tricresyl phosphate, MoS₂), detergents and dispersants (e.g. overbased calcium sulfonate), antioxidants, friction modifiers and solid lubricants (MoS₂, boron nitride, PTFE, graphite), viscosity and pour-point modifiers, and corrosion/rust inhibitors. Base oils — mineral and synthetic (PAO) — are the carrier fluid the package is blended into.
What does ZDDP do in a lubricant?
Zinc dialkyldithiophosphate is the most widely used antiwear additive; it forms a protective tribofilm on metal under boundary lubrication and also provides antioxidant function. It is the backbone of most engine-oil and many industrial-oil additive packages.
What is the difference between a detergent and a dispersant?
A detergent (such as overbased calcium sulfonate) carries reserve alkalinity to neutralize acids and keep high-temperature surfaces clean; a dispersant keeps soot and contaminants suspended in the oil so they do not agglomerate into sludge. Many formulations use both.
When should I use a synthetic base oil like PAO?
Polyalphaolefin (PAO) offers a wider operating-temperature range, better oxidation stability and cleaner running than mineral oils, which suits extended-drain, high- or low-temperature, and high-performance applications. Mineral and naphthenic oils remain cost-effective for many industrial fluids.
How are lubricant additives supplied and quoted?
They are supplied as liquids, dispersions, powders or pastes specified by active content, form and grade, in drums, totes or bulk. Send your duty (engine oil, grease, metalworking, gear/hydraulic) and target chemistry for a quote; the Certificate of Analysis governs the delivered specification.
Disclaimer
Information on this page is provided for general reference and compiled from authoritative public sources. Values are typical and are not a guaranteed specification; the Certificate of Analysis for the lot you purchase governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim. Always consult the current Safety Data Sheet before handling, and confirm regulatory status, classification and suitability for your application and jurisdiction.
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