The newly formulated RAVENOL RSE 10W-50 is a modern, fully synthetic, fuel-saving, low friction multigrade engine oil using the latest tungsten based technology and developed for the latest generation of race and rally engines. This oil is not only impressive as a result of its low sulphate ash content but also offers reduced HTHS viscosity for measurable fuel savings, even when driven hard. It therefore not only reduces the amount of fuel carried (and therefor weight) but also contributes to reducing emissions and protecting the environment. As a result of the use of special tungsten based additives, RAVENOL RSE SAE 10W-50 provides the ultimate protection when driving on the limit. It utilizes the positive properties of tungsten to smooth the surface structure of the motor, reducing friction and wear, and significantly improving mechanical efficiency. It provides a safe layer of lubrication, even at very high operating temperatures and provides extensive protection against corrosion (oxidation) and foaming.