1. Viscosity

The information on viscosity describes the behavior of a lubricant when the temperature changes.

When hot, the oil becomes more fluid; it flows more easily. In the event of city or leisure driving, or when the air temperature is high, the engine experiences high temperatures that accentuate the phenomenon. It is therefore important to use an oil that remains sufficiently viscous when hot to protect the engine.

This property is measured with the S.A.E. specification.

2. Base oils

Performance and characteristics differ from one lubricant to another, the only thing they have in common is that they are have a principal ingredient called a " lubricant base ", which represents 75 to 85% of the oil and which may be of mineral (petroleum) or synthetic origin.

3. Manufacturer certification

After having been tested for efficacy, the better part of our lubricants are certified by manufacturers such as :

• For automobiles : Mercedes-Benz, Renault, Peugeot, Volkswagen, Citroën, Ford, Fiat, Porsche, BMW, ?
• For heavy trucks: MAN, MB, Volvo, RVI, ?

4. Norms

The specifications API and ACEA are the sign of quality recognised by many manufacturers. Certain manufacturers, however, add their own requirements.