XL 5W-30 Synthetic Motor Oil in Gallon Jug 4 Count by Amsoil

XL 5W-30 Synthetic Motor Oil XL Synthetic Motor Oil maintains its fluidity viscosity under the most extreme conditions. Some oils break down and significantly increase in viscosity after extended periods of high-temperature operation. These changes can cause excessive oil consumption engine deposits accelerated wear and difficult cold-starts. The GM Oxidation and Deposit GMOD Test consists of a 5.7L V8 engine running at 293oF 100o hotter than normal for 100 hours. These severe operating conditions test an oils ability to control viscosity increase deposits and oil consumption. The testing revealed that AMSOIL XL Synthetic Motor Oil provides 64 percent more protection against oil breakdown1 than required by the GM dexos1 Gen 2 specification ensuring protection in extreme temperatures.