The obtained data correlate with oil oxidation results in real internal combustion engines.
The DOT (Daimler Oxidation Test) is part of the Mercedes-Benz (MB) specification and evaluates the oxidative stability of oil
that is simultaneously exposed to high temperature (160 °C), airflow and a catalyst for 168 hours.
According to the DOT test results, engine oil with KIREI additives demonstrated improved antioxidant properties (22 A/cm),
meeting not only the MB 228.31 specification (no more than 80 A/cm) with almost a fourfold margin,
but also confirming compliance with the stricter MB 228.51 specification (no more than 25 A/cm).
At the same time, the 10W-40 oil retained its viscosity grade (kinematic viscosity change at 100 °C was 14%).

The PDSC (Pressure Differential Scanning Calorimetry) test results showed that the 10W-40 engine oil
has high oxidation stability (183 min), exceeding the ACEA E9 standard (minimum 65 min) by three times.

The KIREI CVL CK-4 157 additive package is a mid-SAPS package for the production of heavy-duty engine oils
of API CK-4/API CJ-4 and ACEA E9 classes.
The package contains highly effective antioxidants, detergents, ash-free dispersants, corrosion inhibitors,
friction modifiers and anti-wear components.
It ensures engine cleanliness, long oil service life and protects engine parts from wear and deposit formation.
KIREI products are officially supplied in Russia and the company is ready to fill the gap left after major additive manufacturers exited the Russian market.