{"id":435,"date":"2026-06-12T08:24:28","date_gmt":"2026-06-12T12:24:28","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1998-dodge-ram-2500-hd-pickup-5-9l-6-cyl-diesel-turbo-maintenance-guide\/"},"modified":"2026-06-12T08:24:28","modified_gmt":"2026-06-12T12:24:28","slug":"1998-dodge-ram-2500-hd-pickup-5-9l-6-cyl-diesel-turbo-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1998-dodge-ram-2500-hd-pickup-5-9l-6-cyl-diesel-turbo-maintenance-guide\/","title":{"rendered":"1998 Dodge Ram 2500 HD 5.9L 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 1998 Dodge Ram 2500 HD 5.9L Diesel take?<\/h2>\n

For the 1998 Dodge Ram 2500 HD with the 5.9L 6-cylinder 24-valve turbo diesel engine, the recommended oil viscosity is 15W-40 for temperatures above -12\u00b0C. For colder climates, 10W-30 is recommended for temperatures between -23\u00b0C and -1\u00b0C, provided the vehicle is equipped with an engine block heater. The total oil capacity is 11 quarts with a filter change.<\/p>\n

AMSOIL product recommendations<\/h2>\n

Based on the AMSOIL lookup data, here are the recommended fluids and filters for your Ram Cummins diesel engine:<\/p>\n

Engine Oil Recommendations<\/h3>\n
\n\n\n\n\n
Product Name<\/th>\nCode<\/th>\n<\/tr>\n
AMSOIL Signature Series 15W-40 100% Synthetic Max-Duty Diesel Oil<\/td>\nDMEQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL 15W-40 Heavy-Duty 100% Synthetic Diesel Oil<\/td>\nADPQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Oil Filter Recommendations<\/h3>\n
\n\n\n\n\n
Product Name<\/th>\nCode<\/th>\n<\/tr>\n
AMSOIL Oil Filter<\/td>\nEAO80-EA<\/a><\/td>\n<\/tr>\n
WIX Oil Filter<\/td>\n51607-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant & Transmission Recommendations<\/h3>\n
\n\n\n\n\n\n\n
Component<\/th>\nProduct Name<\/th>\nCode<\/th>\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
ATF (47RE)<\/td>\nAMSOIL Signature Series Multi-Vehicle 100% Synthetic ATF<\/td>\nATFPK-EA<\/a><\/td>\n<\/tr>\n
ATF (46RE)<\/td>\nAMSOIL Signature Series Multi-Vehicle 100% Synthetic ATF<\/td>\nATFPK-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Specifications and Details<\/h2>\n

Maintaining the correct oil viscosity is vital for the longevity of the 5.9L Cummins turbo diesel engine. Proper lubrication protects against extreme pressure and high operating temperatures.<\/p>\n

Oil Viscosity & Capacity<\/h3>\n
\n\n\n\n\n\n\n
Parameter<\/th>\nSpecification\/Value<\/th>\n<\/tr>\n
Oil Grade<\/td>\nCF-4<\/td>\n<\/tr>\n
Viscosity (Above -12\u00b0C)<\/td>\n15W-40<\/td>\n<\/tr>\n
Viscosity (-23 to -1\u00b0C)<\/td>\n10W-30 (Requires engine block heater)<\/td>\n<\/tr>\n
Oil Capacity<\/td>\n11 quarts (with filter)<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Drain Plug Torque<\/h3>\n

The oil drain plug for this vehicle should be torqued to 37 ft\/lbs<\/strong>.<\/p>\n

Automatic Transmission Fluid Details<\/h2>\n

Depending on your specific transmission model, the capacity and requirements will vary. Ensure you use a high-quality synthetic fluid to handle heavy towing loads.<\/p>\n

Transmission Capacities<\/h3>\n
\n\n\n\n\n
Transmission Type<\/th>\nTotal Fill Capacity<\/th>\nInitial Fill<\/th>\n<\/tr>\n
4 speed 47RE<\/td>\n16.9 quarts<\/td>\n4 quarts<\/td>\n<\/tr>\n
4 speed 46RE<\/td>\n11.6 quarts<\/td>\n4 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant Specifications<\/h2>\n

The cooling system capacity for this vehicle is 24.3 quarts<\/strong>. Using a compatible coolant is essential to protect all cooling system metals, gaskets, and hoses.<\/p>\n

Coolant Options<\/h3>\n