The cylinder oil will have to neutralize the acidic products of combustion and have good （） properties to keep the metal surfaces clean.

As for turbine oil, contact with water in the form of s...

单项选择题As for turbine oil, contact with water in the form of steam will be inevitable so good （） properties will be essential.

Any carbon built up on surfaces must be washed away by ...

单项选择题Any carbon built up on surfaces must be washed away by （） additives and held in suspension by a （） additive.

The （） of an oil refers to its ability to mix with wate...

单项选择题The （） of an oil refers to its ability to mix with water and then release the water in a centrifuge.