{"id":640,"date":"2026-06-26T19:22:23","date_gmt":"2026-06-26T23:22:23","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2018-chevrolet-silverado-2500-hd-pickup-6-6l-8-cyl-diesel-turbo-maintenance-guide\/"},"modified":"2026-06-26T19:22:23","modified_gmt":"2026-06-26T23:22:23","slug":"2018-chevrolet-silverado-2500-hd-pickup-6-6l-8-cyl-diesel-turbo-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2018-chevrolet-silverado-2500-hd-pickup-6-6l-8-cyl-diesel-turbo-maintenance-guide\/","title":{"rendered":"2018 Chevrolet Silverado 2500 HD 6.6L L5P Diesel Oil & Maintenance Guide"},"content":{"rendered":"
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\"AMSOIL
AMSOIL diesel oil guide for trucks, vans, SUVs and diesel engines<\/figcaption><\/figure>\n

What oil does a 2018 Chevrolet Silverado 2500 HD 6.6L Diesel take?<\/h2>\n

For the 2018 Chevrolet Silverado 2500 HD with the 6.6L L5P diesel engine, the recommended oil viscosity is SAE 15W-40 for temperatures above -18\u00b0C (0\u00b0F). If ambient temperatures drop below 0\u00b0F (-18\u00b0C), use 5W-40 to improve cold starting performance. The required oil specification is CJ-4. The engine oil capacity is 10 quarts when performing a change with a new filter.<\/p>\n

AMSOIL product recommendations<\/h2>\n

Based on the AMSOIL lookup for your GM Duramax L5P engine, the following products are recommended to maintain peak performance and protect critical diesel components.<\/p>\n

Engine Oil Recommendations<\/h3>\n
\n\n\n\n\n
Product Name<\/th>\nViscosity<\/th>\nPart Number<\/th>\n<\/tr>\n
AMSOIL Signature Series Max-Duty Diesel Oil<\/td>\n15W-40<\/a><\/td>\nDMEQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Heavy-Duty Synthetic Diesel Oil<\/td>\n15W-40<\/a><\/td>\nADPQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Note: The AMSOIL lookup oil grade for this application is CJ-4.<\/em><\/p>\n

Oil Filter Recommendations<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nPart Number<\/th>\n<\/tr>\n
AMSOIL Oil Filter<\/td>\nEAO52-EA<\/a><\/td>\n<\/tr>\n
WIX XP Oil Filter<\/td>\n57202XP-EA<\/a><\/td>\n<\/tr>\n
WIX Oil Filter<\/td>\n57202-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Air Filter & Coolant<\/h3>\n
\n\n\n\n\n\n
Component<\/th>\nProduct Name<\/th>\nPart Number<\/th>\n<\/tr>\n
Air Filter<\/td>\nWIX Air Filter<\/td>\nWA10695-EA<\/a><\/td>\n<\/tr>\n
Coolant<\/td>\nAMSOIL Passenger Car & Light Truck Antifreeze & Coolant<\/td>\nANTPC1G-EA<\/a><\/td>\n<\/tr>\n
Coolant<\/td>\nAMSOIL Propylene Glycol Antifreeze and Engine Coolant<\/td>\nANT1G-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Details<\/h2>\n

Proper lubrication is vital for the Duramax L5P engine. Below are the specific technical requirements and capacities confirmed from the source data.<\/p>\n

Oil Specifications & Viscosity<\/h3>\n
\n\n\n\n\n\n
Requirement<\/th>\nValue<\/th>\n<\/tr>\n
Oil Specification<\/td>\nCJ-4<\/td>\n<\/tr>\n
Preferred Viscosity (Above -18\u00b0C)<\/td>\nSAE 15W-40<\/td>\n<\/tr>\n
Cold Start Viscosity (Below -18\u00b0C)<\/td>\n5W-40<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Oil Capacity & Torque<\/h3>\n
\n\n\n\n\n
Metric<\/th>\nSpecification<\/th>\n<\/tr>\n
Capacity (with filter)<\/td>\n10 quarts<\/td>\n<\/tr>\n
Oil Drain Plug Torque<\/td>\n18 ft\/lbs<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Note: Always check the oil level after refilling.<\/em><\/p>\n

Diesel maintenance notes for this vehicle<\/h2>\n