Sustina (3200302) API SN/ILSAC GF-5 Certified 5W-30 Fully Synthetic Motor Oil - 6 Pack Quart Improved fuel efficiency up to 2 percentage improvement over GF-5 oil Superior engine protection maintains cleanness of engines 2 times as longer than full synthetic GF-5 Ultra high viscosity index base oil (much higher than PAO) base Sulfur free additive components; 10x the protection of ZDDP or ZDTP