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Motorcycle
Shell Advance oils are made up of a special mix of top-quality synthetic, semi-synthetic, or mineral base oils. Special high-performance additives are also mixed in to provide long lasting protection against engine srtess and improved cleanliness. It takes years of oil formulation experience to come up with the right formula for Shell Advance and the way various additives are mixed in with base oil is crucial to its overall performance. With less sophisicated oils, intense shear forces can lead to breakdown of viscocity modifiers that are added to prevent oils becoming too thin as the running temperature increases. When this breakdown occurs, small carbon particles are released into the oil and can form sludge deposits especially at hot engine parts such as pistons d piston ring groo, resulting in starting problems, power loss and pailure to protect pistons from metal loss.