The instrument is used to test thermo-oxidation engine oil simulation. The procedure includes determination of mass of deposit formed on a specially constructed test rod after oxidative and catalytic conditions at 285 °C is repetitively exposed to passage of 8.5 g of engine oil. - User can set working time, automatic stop after finishing test. Catalyst magnetic mixing device can set mixing time and speed. All parameters can be set on touch screen, one-click start test.