These additives use an organic acid as the primary corrosion inhibitor and heavily depend on various inorganic supplements such as silicate, nitrate, phosphate, and molybdate. Heavy-duty versions may contain nitrite. Three substantial subcategories exist: American hybrids may not use benzoate, a common organic acid in European coolants, but a diﬀerent organic acid and otherwise look like conventional fully-formulated approaches. European styles rarely use phosphate. Asian styles rarely use silicate and may use multiple carboxylates in combination.
These versatile formulas typically last 3 years or 60,000 miles.
ACA-4 – Automotive, Light-Duty, Heavy Duty
Organic Acid Technology (OAT)
These additives deliver exceptional extended life protection (ELC) and rely primarily on carboxylic acids and azoles. They generally do not contain silicate or borate. Heavy-duty versions may also contain nitrite or molybdate, or both, but they still fall in the OAT family.
These packages contain non-hazardous formulas and are designed to last 6 years or 600,000 miles.
D16 – Heavy Duty
D16 - Automotive, Light Duty
D17-A – Automotive, Light Duty
OCA-2M – Heavy Duty
WCA-M – Automotive, Light Duty
Rail & Marine
A borate / nitrite inhibitor treatment that provides superior corrosion and scale protection for today’s modern locomotive and marine diesel engines. Contains a complete corrosion inhibitor system that protects not only the yellow metals, cast iron, and steel in your system, but aluminum and solder as well. This feature lowers maintenance down-time and part replacement costs.