Shell Rimula RT4X provides:

   Up to 50% better engine cleanliness1
   Up to 50% more cleanliness control, i.e., less engine sludge, in different parts of the engine has been demonstrated in key engine tests for meeting US and European specifications.
   Up to 50% better acid corrosion protection1
   Shell Rimula RT4 X is proven to give up to 50% more protection in engine and laboratory tests and field trials under real-world truck driving conditions.
   Up to 30% better wear protection1
   In the Mack T-10 engine test, Shell Rimula RT4 X demonstrated up to 30% better wear protection of engine piston rings and cylinder liners than required to meet the API CI-4 specification.