To be honest, if you want to identify the quality of a kind of engine oil based on its appearance, it is really difficult according to the development of today's technology. Regardless of the packaging, anti-counterfeiting labels, or fonts, the workmanship is so perfect. .

However, this engine oil can really distinguish between good and bad. For some reasons, I can only name two types here:

①Identification before the bottle is opened

Generally, when poor engine oil shakes, the sound is loud and brittle, just like the sound of a bottle of mineral water shaking. And good engine oil is viscous, and the sloshing sound will be completely different. When buying, you can compare them by shaking them. This is actually the simplest, most direct, and most effective method.

②Some engine oils with good viscosity and good color may not necessarily be good engine oils.

You need to open the cap to check this. After adding the engine oil, check to see if there is black sediment at the bottom of the bottle. If there is, then congratulations on winning the prize. This must be extracted from waste engine oil. Some good waste engine oil becomes new engine oil after being re-filtered. It's really not possible to identify this kind of oil by shaking it, because its viscosity is still there, but it's just lacking in color or temperature and wear resistance. Therefore, in order to achieve profit, some people adopt filtering methods to get through.

The last thing I want to say is that it is most secure to buy engine oil at a regular specialty store.