Product Description Goodyear Acer CK-4 is heavy-duty multi-grade diesel engine oil for use in the latest generation of high-speed 4- stroke diesel engines; specifically formulated for on-highway and off-high­way applications. It complies with the low emission law besides meeting LOW SAPS requirement of the latest diesel trucks needing API CK-4 level of performance and SAE 15W40 viscometrics. Download Product 10W30_-_10W40_-_15W40 Data Sheet Product Code API MEETSExceeds Grade MSDS GYD-4115/CK1030 CK-4 10W30 Download GYD-4120/CK1040 CK-4 10W40 Download GYD-4125/CK1540 CK-4 15W40 Download