Always buy oil from a brand
that has the starburst symbol, which indicates that the oil has been tested by
the American Petroleum Institute (API). On the container, you'll also notice a
two-character service designation. The most recent API service standards are SP
for gasoline engines and CK-4 for diesel engines
Check whether the correct viscosity guide is followed or not.
Must follow proper rules in the production process.
Need to know whether it is produced by genuine or correct quality beige oil
Ability to properly clean all parts inside the engine, keep the engine cool and prevent friction