Nova AdditivesLubricant Additives
Overbased DetergentsNova Additives

DT-400M

Overbased magnesium alkylbenzene sulfonate

Magnesium instead of calcium. The reason to pay the premium is low-speed pre-ignition behaviour in downsized turbocharged gasoline engines — an area where calcium is actively implicated and magnesium is not.

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Typical propertiesLiquid
Metal
Magnesium

Typical values, not a specification. The binding specification is the one on the certificate of analysis issued against each batch.

The chemistry

Overbased Detergents

Acid neutralisation and deposit control

Typical treat rate0.5 – 4.0 %

Overbased calcium and magnesium sulfonates carry a colloidal carbonate core that neutralises combustion acids, plus a surfactant shell that keeps piston surfaces clean. TBN is the working currency here. Magnesium is chosen over calcium where low-speed pre-ignition or ash-related deposit behaviour is the constraint.

Used in
Engine oilsMarine cylinder & trunk-piston oilsRailroad oilsGas engine oilsRust-preventive coatings
Where DT-400M is specified

Engine Oils

Passenger-car, heavy-duty and gas engine crankcase formulations, including low-SAPS.

Rust Preventives & Quenching

Slushing oils, export packaging fluids, quench oils and heat-treatment fluids.

Other grades in Detergent
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Documentation

A full technical data sheet, safety data sheet in the language of the receiving country, REACH status statement and SVHC declaration are issued with every enquiry for DT-400M. Certificates of analysis accompany each consignment and retained samples are held for the full shelf life.

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