Product Description Goodyear Sierra is a very high performance lubricant for diesel engines. It is formulated with the combination of high performance additives and highly refined base stocks which ensure the control and sweeping away the soot and particles found in high performance engine. Download Product 10W30_-_10W40_-_15W40 Data Sheet Product Code API MEETSExceeds Grade MSDS GYD-4160/CH1030 CH-4 10W30 Download GYD-4165/CH1040   CH-4 10W40 Download GYD-4170/CH1540 CH-4 15W40 Download GYD-4171/CH50   CH-4 50 Download