{"id":641,"date":"2026-06-26T19:52:35","date_gmt":"2026-06-26T23:52:35","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1982-pontiac-bonneville-5-7l-8-cyl-diesel-maintenance-guide\/"},"modified":"2026-06-26T19:52:35","modified_gmt":"2026-06-26T23:52:35","slug":"1982-pontiac-bonneville-5-7l-8-cyl-diesel-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1982-pontiac-bonneville-5-7l-8-cyl-diesel-maintenance-guide\/","title":{"rendered":"1982 Pontiac Bonneville 5.7L Diesel Maintenance Guide: Oil & Fluid Specs"},"content":{"rendered":"
\n
\n
\"AMSOIL
AMSOIL diesel oil guide for trucks, vans, SUVs and diesel engines<\/figcaption><\/figure>\n

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

For the 1982 Pontiac Bonneville 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 for temperatures between -18 to 16\u00b0C, or 30 for temperatures above 0\u00b0C (preferred for continuous driving). The total oil capacity is 7 quarts with a filter change. AMSOIL recommends using Signature Series Max-Duty Synthetic Diesel Oil.<\/p>\n

AMSOIL product recommendations<\/h2>\n

Based on the vehicle specifications, the following AMSOIL products are recommended for your maintenance needs:<\/p>\n

Engine Oil & Filter<\/h3>\n
\n\n\n\n\n\n\n
Product Name<\/th>\nCode<\/th>\n<\/tr>\n
AMSOIL Signature Series 10W-30 100% Synthetic Max-Duty Diesel Oil<\/td>\nDTTQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL 10W-30 Heavy-Duty 100% Synthetic Diesel Oil<\/td>\nADNQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Signature Series 5W-30 100% Synthetic Max-Duty Diesel Oil<\/td>\nDHDQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Oil Filter<\/td>\nEAO64-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant & Transmission Fluid<\/h3>\n
\n\n\n\n\n\n\n
Product Name<\/th>\nCode<\/th>\n<\/tr>\n
AMSOIL Passenger Car & Light Truck Antifreeze & Coolant<\/td>\nANTPC1G-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Propylene Glycol Antifreeze and Engine Coolant<\/td>\nANT1G-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF<\/td>\nATLPK-EA<\/a><\/td>\n<\/tr>\n
AMSOIL OE Fuel-Efficient 100% Synthetic ATF<\/td>\nOTLQT-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 match the viscosity to 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

Capacity and Torque<\/h3>\n
\n\n\n\n\n\n
Specification<\/th>\nValue<\/th>\n<\/tr>\n
Oil Capacity (with filter)<\/td>\n7 quarts<\/td>\n<\/tr>\n
Oil Drain Plug Torque<\/td>\n20 ft\/lbs<\/td>\n<\/tr>\n
Oil Grade<\/td>\nCF<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Note: After refilling, always check the oil level.<\/em><\/p>\n

Automatic Transmission Fluid Specifications<\/h2>\n

The 1982 Bonneville uses specific transmission configurations. Note that manufacturer technical service bulletins have updated specifications for these units.<\/p>\n

THM350C Transmission<\/h3>\n
\n\n\n\n\n\n
Specification<\/th>\nDetail<\/th>\n<\/tr>\n
Fluid Type<\/td>\nAF6 (Updated from Dexron II or III to Dexron VI)<\/td>\n<\/tr>\n
Total Fill Capacity<\/td>\n10 quarts<\/td>\n<\/tr>\n
Initial Fill Capacity<\/td>\n3 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

THM250C Transmission<\/h3>\n
\n\n\n\n\n\n
Specification<\/th>\nDetail<\/th>\n<\/tr>\n
Fluid Type<\/td>\nAF6 (Updated from Dexron II or III to Dexron VI)<\/td>\n<\/tr>\n
Total Fill Capacity<\/td>\n10.8 quarts<\/td>\n<\/tr>\n
Initial Fill Capacity<\/td>\n4 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant Specifications<\/h2>\n

Maintaining the cooling system is vital for this heavy vehicle to prevent overheating.<\/p>\n

\n\n\n\n
Specification<\/th>\nDetail<\/th>\n<\/tr>\n
Capacity<\/td>\n17.4 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

AMSOIL offers two options: a 50\/50 pre-mix (ANTPC1G-EA<\/a>) or a concentrated propylene glycol version (ANT1G-EA<\/a>) which requires mixing with distilled or high-quality water.<\/p>\n

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