Operation & Maintenance Manual for WP7 Euro Ⅵ Vehicle Diesel Engine 1.7 Some Common Products of Weichai Power Special Oils 1.8 Corresponding table between the Weichai Power special oil and engine models 5 Type Oil grade Viscosity grade Package capacity Diesel engine oil WP-E1(CD) 15W/40 20W/50 10W/30 4L, 18L, 200L WP-E2(CF-4) 15W/40 20W/50 10W/30 4L, 18L, 200L WP-E3(CH-4) 5W/30 15W/40 20W/50 10W/30 4L, 18L, 200L WP-E4(CI-4) 15W/40 4L, 18L Gear oil of heavy-duty vehicles GL-5 85W/90 80W/90 4L, 18L Type Special oil grade Applicable engine models High- speed diesel engines and high- power medium- speed diesel engines WP-E1 (CD) Medium-speed diesel engine sets WP-E2 (CF-4) China I and China II diesel engine; construction machineries such as 50 and 30 loaders; WD618/WD12 series, WD615/WD10 series; 226B and medium-speed engine; 15T or more heavy-duty trucks WP-E3 (CH-4) Euro Ⅵ diesel engines; Landing engine series; extra- large heavy-duty trucks and buses; WP4/WP6(165~270HP), WP10(240~375HP), WP12(336~460HP), WD10, WD12 and WP5/WP7(160~300HP) Natural gas engine CNG Compressed natural gas engine; Coach, generator sets and others equipped with compressed natural gas diesel engines.