{"id":288,"date":"2026-05-27T09:48:27","date_gmt":"2026-05-27T13:48:27","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1983-cadillac-seville-5-7l-8-cyl-diesel-maintenance-guide\/"},"modified":"2026-05-27T09:48:27","modified_gmt":"2026-05-27T13:48:27","slug":"1983-cadillac-seville-5-7l-8-cyl-diesel-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1983-cadillac-seville-5-7l-8-cyl-diesel-maintenance-guide\/","title":{"rendered":"1983 Cadillac Seville 5.7L Diesel Maintenance Guide: Oil & Filters"},"content":{"rendered":"
\n
\n
\"AMSOIL
AMSOIL diesel oil guide for trucks, vans, SUVs and diesel engines<\/figcaption><\/figure>\n

What oil does a 1983 Cadillac Seville 5.7L Diesel take?<\/h2>\n

For the 1983 Cadillac Seville with the 5.7L 8-cylinder Engine Code [N] Diesel, the engine requires an oil viscosity of 10W-30 (for temperatures below 16\u00b0C), 15W-40 (-18 to 16\u00b0C), or 30 (above 0\u00b0C). The total oil capacity is 7 quarts with a filter change. AMSOIL recommends using Signature Series 10W-30 Max-Duty Diesel Oil<\/a> or Heavy-Duty 100% Synthetic Diesel Oil<\/a> paired with an EAO64-EA oil filter<\/a>.<\/p>\n

AMSOIL product recommendations<\/h2>\n

The following AMSOIL products are recommended for your 1983 Cadillac Seville 5.7L Diesel engine and related systems based on available application data.<\/p>\n

Engine Oil Options<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nViscosity<\/th>\nPart Code<\/th>\n<\/tr>\n
Signature Series Max-Duty Diesel Oil<\/td>\n10W-30<\/a><\/td>\nDTTQT-EA<\/a><\/td>\n<\/tr>\n
Signature Series Max-Duty Diesel Oil<\/td>\n5W-30<\/a><\/td>\nDHDQT-EA<\/a><\/td>\n<\/tr>\n
Heavy-Duty 100% Synthetic Diesel Oil<\/td>\n10W-30<\/a><\/td>\nADNQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Note: Oil specification for these products is CF.<\/em><\/p>\n

Oil Filter<\/h3>\n
\n\n\n\n
Product Name<\/th>\nPart Code<\/th>\n<\/tr>\n
AMSOIL Oil Filter<\/td>\nEAO64-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Transmission & Coolant<\/h3>\n
\n\n\n\n\n\n\n
Component<\/th>\nProduct Name<\/th>\nPart Code<\/th>\n<\/tr>\n
Automatic Transmission<\/td>\nSignature Series Fuel-Efficient ATF<\/td>\nATLPK-EA<\/a><\/td>\n<\/tr>\n
Automatic Transmission<\/td>\nOE Fuel-Efficient ATF<\/td>\nOTLQT-EA<\/a><\/td>\n<\/tr>\n
Engine Coolant<\/td>\nPassenger Car & Light Truck Antifreeze<\/td>\nANTPC1G-EA<\/a><\/td>\n<\/tr>\n
Engine Coolant<\/td>\nPropylene Glycol Antifreeze<\/td>\nANT1G-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Differential & Gear Lube<\/h3>\n
\n\n\n\n
Product Name<\/th>\nPart Code<\/th>\n<\/tr>\n
SEVERE GEAR\u00ae 80W-90 Synthetic Gear Lube<\/td>\nAGLPK-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

Proper lubrication is critical for the longevity of the 5.7L diesel engine. Ensure you follow the correct viscosity based on your operating environment.<\/p>\n

Oil Viscosity Guide<\/h3>\n
\n\n\n\n\n\n
Temperature Range<\/th>\nRecommended Viscosity<\/th>\n<\/tr>\n
Below 16\u00b0C<\/td>\n10W-30<\/td>\n<\/tr>\n
-18 to 16\u00b0C<\/td>\n15W-40<\/td>\n<\/tr>\n
Above 0\u00b0C<\/td>\n30 (Preferred for continuous driving)<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Oil Change Capacities & Torque<\/h3>\n
\n\n\n\n\n
Metric<\/th>\nValue<\/th>\n<\/tr>\n
Total Capacity (with filter)<\/td>\n7 Quarts<\/td>\n<\/tr>\n
Oil Drain Plug Torque<\/td>\n30 ft\/lbs<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

Transmission Fluid Details<\/h3>\n

The vehicle uses the THM325-4L automatic transmission (AF6 specification). The AMSOIL lookup note indicates this specification has been updated from Dexron II or III to Dexron VI per a manufacturer Technical Service Bulletin.<\/p>\n

\n\n\n\n\n
Fill Type<\/th>\nCapacity<\/th>\n<\/tr>\n
Initial Fill<\/td>\n3.2 Quarts<\/td>\n<\/tr>\n
Total Fill (4-speed THM325-4L)<\/td>\n11 Quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Note: The final drive is serviced separately.<\/em><\/p>\n

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