First look at the appearance of the package. The famous brand oil seal is a disposable cover with sealed tin foil at the gap. The manufacturer marked the tin foil. Without these characteristics, it may be fake oil. In addition, brand-name oil is anti-counterfeiting, and there are special marks in inconspicuous places such as label stickers, tank bottom, inside of tank cover and handle. If criminals customize the packaging for fraud, they can tell by comparing the two packages.
Second, observe the oil, the real oil is light and transparent, without impurities, suspended solids and sediments, and has good fluidity when shaking. Fake oil or oil is dark in color, or has impurity precipitation, or has strong pungent taste, poor fluidity when shaking, or has hand drawing.
Authentic engine oil has added the special essence of Mott's patent (one of its functions is to warn of engine oil leakage), which has a rich and sweet aroma and won't be irritating when you listen to it recently; The color of oil is bright red. At present, fake oil can't make the same fragrance as real oil, and most of them are weak or have different fragrance types. The key is that you will feel obvious irritation and strange smell when you are close to the smell; Most of them are close to dark red or even yellow.