{"id":258,"date":"2026-05-24T11:40:32","date_gmt":"2026-05-24T15:40:32","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1980-oldsmobile-cutlass-5-7l-8-cyl-diesel-maintenance-guide\/"},"modified":"2026-05-24T11:40:32","modified_gmt":"2026-05-24T15:40:32","slug":"1980-oldsmobile-cutlass-5-7l-8-cyl-diesel-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1980-oldsmobile-cutlass-5-7l-8-cyl-diesel-maintenance-guide\/","title":{"rendered":"1980 Oldsmobile Cutlass 5.7L Diesel (Engine Code N) 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 1980 Oldsmobile Cutlass 5.7L Diesel take?<\/h2>\n

For the 1980 Oldsmobile Cutlass with the 5.7L 8-cylinder Engine Code [N] Diesel, the recommended oil capacity is 7 quarts<\/strong> (including filter). Recommended viscosities based on temperature include 10W-30<\/strong> (below 16\u00b0C), 15W-40<\/strong> (-18 to 16\u00b0C), and SAE 30<\/strong> (above 0\u00b0C), with SAE 30 being preferred for temperatures above 0\u00b0C. AMSOIL recommends using high-quality synthetic diesel oils like Signature Series Max-Duty Diesel Oil<\/a> for superior protection.<\/p>\n

AMSOIL product recommendations<\/h2>\n

The following AMSOIL products are specifically listed for the 1980 Oldsmobile Cutlass 5.7L Diesel engine and related maintenance components.<\/p>\n

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

Oil Filter Options<\/h3>\n
\n\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
WIX XP Oil Filter<\/td>\n51522XP-EA<\/a><\/td>\n<\/tr>\n
WIX Oil Filter<\/td>\n51522-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant & Transmission Fluids<\/h3>\n
\n\n\n\n
Product Name<\/th>\nPart Code<\/th>\n<\/tr>\n
AMSOIL Passenger Car & Light Truck Antifreeze & Coolant<\/td>\nANTPC1G-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. Below are the confirmed technical specifications from the AMSOIL lookup data.<\/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 (SAE 30 preferred)<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Oil Capacity & Torque<\/h3>\n
\n\n\n\n\n\n
Specification<\/th>\nValue<\/th>\n<\/tr>\n
Capacity (with filter)<\/td>\n7 quarts<\/td>\n<\/tr>\n
Oil Drain Plug Torque<\/td>\n30 ft\/lbs<\/td>\n<\/tr>\n
Oil Grade (AMSOIL lookup)<\/td>\nCF<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

Maintaining a vintage diesel engine requires attention to detail. Based on the provided data, owners should consider the following:<\/p>\n