Shell Rimula (R4 X) is formulated with Shell’s innovative Dynamic Protection technology, which features an advanced additive system that adapts to your engine’s specific requirements. This helps to provide protection in three key areas:acid and corrosion control: It protects against corrosion by controlling the acids formed as the fuel burns1 wear control: It maintains strongly protective oil films to keep critical engine components working.1 deposit control: It resists high-temperature oxidation, thereby keeping engines clean from deposits1