{"id":786,"date":"2026-07-06T10:53:22","date_gmt":"2026-07-06T14:53:22","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1982-buick-lesabre-5-7l-8-cyl-diesel-maintenance-guide\/"},"modified":"2026-07-06T10:53:22","modified_gmt":"2026-07-06T14:53:22","slug":"1982-buick-lesabre-5-7l-8-cyl-diesel-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1982-buick-lesabre-5-7l-8-cyl-diesel-maintenance-guide\/","title":{"rendered":"1982 Buick LeSabre 5.7L Diesel Maintenance Guide: Oil & Fluid Specs"},"content":{"rendered":"
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\"AMSOIL
AMSOIL diesel oil guide for trucks, vans, SUVs and diesel engines<\/figcaption><\/figure>\n

For the 1982 Buick LeSabre with the 5.7L 8-cylinder Diesel (Engine Code N), the engine 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 30 weight<\/strong> for continuous driving above 0\u00b0C. AMSOIL recommends using Signature Series 10W-30 Max-Duty Diesel Oil<\/a> paired with an AMSOIL Oil Filter (EAO64-EA)<\/a>.<\/p>\n

What oil does a 1982 Buick LeSabre 5.7L Diesel take?<\/h2>\n

The 1982 Buick LeSabre with the 5.7L 8-cylinder Engine Code N requires an oil grade of CF. The specific viscosity depends on your operating environment: use 10W-30 for temperatures below 16\u00b0C, 15W-40 for temperatures between -18 to 16\u00b0C, and a 30 weight oil is preferred for continuous driving when temperatures are above 0\u00b0C.<\/p>\n

AMSOIL product recommendations<\/h2>\n

Based on the vehicle specifications, AMSOIL provides high-performance synthetic options for your diesel engine and transmission systems to ensure longevity and efficiency.<\/p>\n

Engine Oil & Filter Kits<\/h3>\n
\n\n\n\n\n\n\n
Product Name<\/th>\nCode<\/th>\n<\/tr>\n
Signature Series 5W-30 Max-Duty Diesel Oil<\/td>\nDHDQT-EA<\/a><\/td>\n<\/tr>\n
Signature Series 10W-30 Max-Duty Diesel Oil<\/td>\nDTTQT-EA<\/a><\/td>\n<\/tr>\n
Heavy-Duty 10W-30 Synthetic Diesel Oil<\/td>\nADNQT-EA<\/a><\/td>\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
Product Name<\/th>\nCode<\/th>\n<\/tr>\n
Passenger Car & Light Truck Antifreeze\/Coolant<\/td>\nANTPC1G-EA<\/a><\/td>\n<\/tr>\n
Propylene Glycol Antifreeze & Coolant<\/td>\nANT1G-EA<\/a><\/td>\n<\/tr>\n
Signature Series Fuel-Efficient ATF<\/td>\nATLPK-EA<\/a><\/td>\n<\/tr>\n
OE 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\n
Viscosity Range<\/th>\nCondition<\/th>\n<\/tr>\n
10W-30<\/td>\nBelow 16\u00b0C<\/td>\n<\/tr>\n
15W-40<\/td>\n-18 to 16\u00b0C<\/td>\n<\/tr>\n
30<\/td>\nAbove 0\u00b0C (Preferred for continuous driving)<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Oil Specification:<\/strong> CF<\/p>\n

Engine Oil Capacity & Torque<\/h3>\n
\n\n\n\n\n
Component<\/th>\nCapacity\/Torque<\/th>\n<\/tr>\n
Total Oil Capacity<\/td>\n7 quarts (with filter)<\/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

How much transmission fluid does it take?<\/h2>\n

Capacity varies depending on your specific automatic transmission model (THM series). All listed models have been updated from Dexron II or III to Dexron VI per manufacturer technical service bulletins.<\/p>\n

Transmission Capacity Details<\/h3>\n
\n\n\n\n\n\n\n
Transmission Model<\/th>\nTotal Fill<\/th>\nInitial Fill<\/th>\n<\/tr>\n
THM250C (3-speed)<\/td>\n10.8 quarts<\/td>\n4 quarts<\/td>\n<\/tr>\n
THM350C (3-speed)<\/td>\n10 quarts<\/td>\n3 quarts<\/td>\n<\/tr>\n
THM325-4L (4-speed)<\/td>\n10 quarts<\/td>\n3.2 quarts<\/td>\n<\/tr>\n
THM200-4R (4-speed)<\/td>\n11 quarts<\/td>\n5 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant Specifications<\/h2>\n

The cooling system capacity for this vehicle is 18 quarts. AMSOIL offers both pre-mix and concentrated options to maintain engine temperature and protect internal components.<\/p>\n

\n\n\n\n\n
Product Type<\/th>\nFormulation<\/th>\n<\/tr>\n
ANTPC1G-EA<\/a><\/td>\nEthylene glycol 50\/50 pre-mix<\/td>\n<\/tr>\n
ANT1G-EA<\/a><\/td>\nConcentrated (requires mixing with distilled or high-quality water)<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Common diesel oil-related concerns and how AMSOIL products may help<\/h2>\n

Maintaining a vintage diesel engine requires addressing specific lubrication challenges common to early 1980s GM technology.<\/p>\n

\n\n\n\n\n\n
Concern<\/th>\nWhy it matters<\/th>\nAMSOIL Product<\/th>\nHow it may help<\/th>\nLimitation<\/th>\n<\/tr>\n
Engine Wear<\/td>\nDiesel engines face high pressure and friction.<\/td>\nDTTQT-EA<\/a><\/td>\nDelivers up to 6X more wear protection.<\/td>\nRequires regular oil changes.<\/td>\n<\/tr>\n
Contaminants<\/td>\nSmall particles can cause abrasive wear.<\/td>\nEAO64-EA<\/a><\/td>\n99% efficiency at 20 microns.<\/td>\nFilter must be replaced per interval.<\/td>\n<\/tr>\n
Extreme Temps<\/td>\nViscosity changes can affect lubrication.<\/td>\nDHDQT-EA<\/a><\/td>\nExcels in extreme temperatures.<\/td>\nNot a substitute for proper viscosity selection.<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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