Field inspection
1) Visual Inspection of Oil in a Sample Bottle: - Colour: wrong or mixed oil, photo-catalytic reaction, oxidation and thermal degradation, soot, chemical contamination - Emulsions and Cloudiness: haze to buttermilk, cuff, stable or unstable, additive floc, salt, air, glycol - Free Water: colour, speed of separation, level - Sediments – colour: amber, black, translucent, settling rate, density and particle size, laser through the bottle 2) Using Oil Colour as a Field Test: - You can check the colour of the oil sample with the help of an oil change colour gauge by using glass or PET plastic bottles - Without a gauge, you can compare the sample with a new oil sample and observe the colour, if you find that colour of the oil is milky or dark, then check the contamination & moisture in oil with the help of an Oil testing kit 3) Moisture Detection by Vision: - Visual inspection - Transparent container - Use comparators and good lighting, laser pointer is also effective - Hazy to milky