{"id":364,"date":"2026-06-04T11:15:23","date_gmt":"2026-06-04T15:15:23","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1985-chevrolet-impala-5-7l-8-cyl-diesel-maintenance-guide\/"},"modified":"2026-06-04T11:15:23","modified_gmt":"2026-06-04T15:15:23","slug":"1985-chevrolet-impala-5-7l-8-cyl-diesel-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1985-chevrolet-impala-5-7l-8-cyl-diesel-maintenance-guide\/","title":{"rendered":"1985 Chevrolet Impala 5.7L Diesel Maintenance Guide | Oil & Filter Specs"},"content":{"rendered":"
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\"AMSOIL
AMSOIL diesel oil guide for trucks, vans, SUVs and diesel engines<\/figcaption><\/figure>\n

For the 1985 Chevrolet Impala with the 5.7L 8-cylinder Engine Code [N] Diesel, the oil capacity is 7 quarts (including filter replacement). Recommended viscosities include 10W-30 for temperatures below 16\u00b0C, 15W-40 for -18\u00b0C to 16\u00b0C, and SAE 30 is preferred for temperatures above 0\u00b0C. AMSOIL recommends using Signature Series 10W-30 100% Synthetic Max-Duty Diesel Oil<\/a> (DTTQT-EA<\/a>) paired with an AMSOIL Oil Filter<\/a> (EAO64-EA<\/a>).<\/p>\n

What oil does a 1985 Chevrolet Impala 5.7L Diesel take?<\/h2>\n

The engine requires an oil with a CF grade specification. Depending on your operating environment, the recommended viscosity varies: use 10W-30 for temperatures below 16\u00b0C, 15W-40 for temperatures between -18\u00b0C and 16\u00b0C, or SAE 30 for temperatures above 0\u00b0C (where SAE 30 is preferred).<\/p>\n

AMSOIL Product Recommendations<\/h2>\n

To simplify your maintenance, AMSOIL offers high-performance synthetic fluids and filters specifically selected for the 5.7L Diesel engine requirements.<\/p>\n

Engine Oil Options<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nViscosity<\/th>\nCode<\/th>\n<\/tr>\n
AMSOIL Signature Series Max-Duty Diesel Oil<\/td>\n10W-30<\/a><\/td>\nDTTQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL 10W-30 Heavy-Duty Diesel Oil<\/td>\n10W-30<\/a><\/td>\nADNQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Signature Series Max-Duty Diesel Oil<\/td>\n5W-30<\/a><\/td>\nDHDQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

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

Engine Oil Specifications<\/h3>\n
\n\n\n\n\n
Specification<\/th>\nDetails<\/th>\n<\/tr>\n
Oil Grade<\/td>\nCF<\/td>\n<\/tr>\n
Preferred Viscosity (Above 0\u00b0C)<\/td>\nSAE 30<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Capacity & Torque<\/h3>\n
\n\n\n\n\n
Measurement<\/th>\nValue<\/th>\n<\/tr>\n
Oil 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

Automatic Transmission Fluid Specifications<\/h2>\n

For the automatic transmission, the manufacturer’s technical service bulletin indicates that the specification has been updated from Dexron II or III to Dexron VI. Ensure you select the correct fluid for your specific transmission model (THM200-4R, THM200C, or THM700-R4).<\/p>\n

Transmission Capacity Guide<\/h3>\n
\n\n\n\n\n\n
Transmission Model<\/th>\nTotal Fill<\/th>\nInitial Fill<\/th>\n<\/tr>\n
THM200-4R (4 Speed)<\/td>\n11 quarts<\/td>\n5 quarts<\/td>\n<\/tr>\n
THM200C (3 Speed)<\/td>\n9.4 quarts<\/td>\n3.5 quarts<\/td>\n<\/tr>\n
THM700-R4 (4 Speed)<\/td>\n10.9 quarts<\/td>\n5 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

Maintaining a vintage diesel engine requires attention to several key areas:<\/p>\n