{"id":418,"date":"2026-06-10T23:42:27","date_gmt":"2026-06-11T03:42:27","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1985-oldsmobile-cutlass-5-7l-8-cyl-diesel-maintenance-guide\/"},"modified":"2026-06-10T23:42:27","modified_gmt":"2026-06-11T03:42:27","slug":"1985-oldsmobile-cutlass-5-7l-8-cyl-diesel-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1985-oldsmobile-cutlass-5-7l-8-cyl-diesel-maintenance-guide\/","title":{"rendered":"1985 Oldsmobile Cutlass 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 Oldsmobile Cutlass with the 5.7L 8-cylinder Diesel engine (Engine Code N), the oil capacity is 7 quarts<\/strong> (including filter replacement). Recommended viscosities include 10W-30<\/strong> for temperatures below 16\u00b0C, 15W-40<\/strong> for -18 to 16\u00b0C, and SAE 30<\/strong> is preferred for temperatures above 0\u00b0C. AMSOIL recommends using high-quality synthetic diesel oils like Signature Series 10W-30<\/a> or Signature Series 5W-30<\/a> for maximum protection.<\/p>\n

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

The 1985 Oldsmobile Cutlass with the 5.7L 8-cylinder diesel engine (Code N) requires an oil grade of CF. Depending on your operating temperature, you should use 10W-30 for temperatures below 16\u00b0C, 15W-40 for -18 to 16\u00b0C, or SAE 30 if temperatures are consistently above 0\u00b0C.<\/p>\n

AMSOIL product recommendations<\/h2>\n

Based on the AMSOIL lookup for your 1985 Oldsmobile Cutlass 5.7L Diesel, the following products are recommended to maintain engine health and performance.<\/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 Options<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nCode<\/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\n\n\n
Component<\/th>\nProduct Name<\/th>\nCode<\/th>\n<\/tr>\n
Coolant<\/td>\nAMSOIL Passenger Car & Light Truck Antifreeze<\/td>\nANTPC1G-EA<\/a><\/td>\n<\/tr>\n
Coolant<\/td>\nAMSOIL Propylene Glycol Antifreeze<\/td>\nANT1G-EA<\/a><\/td>\n<\/tr>\n
ATF<\/td>\nAMSOIL Signature Series Fuel-Efficient ATF<\/td>\nATLPK-EA<\/a><\/td>\n<\/tr>\n
ATF<\/td>\nAMSOIL OE Fuel-Efficient ATF<\/td>\nOTLQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Specifications<\/h3>\n