Castrol 06006 GTX MAGNATEC 0W-20 Full Synthetic Motor Oil, 1 Quart, 6 Pack -Dramatically reduce engine wear -Leave critical engine parts 4X smoother* * As tested in the industry Sequence IVA wear test -Superior wear protection on critical engine parts -Unsurpassed level of protection against viscosity breakdown -Unique full synthetic technology to fight against harmful sludge build-up -High level of fuel economy based on US industry standards -API SN; ILSAC GF-5; GM dexos1 Castrol recommends the use of Bosch oil filters