Cochin laboratory

REID VAPOUR PRESSURE-RVP ( P 39, D 323, IP 69, ISO 3007)

The Reid Vapour Pressure is an important parameter for fuel safety and performance, being a measure of the tendency to form explosive vapours. It is the absolute vapour pressure exerted by the gasoline at 37.80C (1000F). RVP is largely governed by the fuel's butane content.

VISCOSITY INDEX (P 56, D 2270, IP 226, ISO 2909)

The Viscosity Index is a widely used and accepted measure of the variation in kinematic viscosity due to changes in the temperature of a petroleum product between 40 and 100°C. Viscosity index is an arbitrary number used to characterize the variation of the kinematic viscosity of a petroleum product with temperature. For oils of similar kinematic viscosity, the higher the viscosity index the smaller is the Effect of temperature on its kinematic viscosity