{"id":491,"date":"2026-06-15T22:17:29","date_gmt":"2026-06-16T02:17:29","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1984-buick-regal-4-3l-6-cyl-diesel-maintenance-guide\/"},"modified":"2026-06-15T22:17:29","modified_gmt":"2026-06-16T02:17:29","slug":"1984-buick-regal-4-3l-6-cyl-diesel-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1984-buick-regal-4-3l-6-cyl-diesel-maintenance-guide\/","title":{"rendered":"1984 Buick Regal 4.3L V6 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

What oil does a 1984 Buick Regal 4.3L V6 Diesel take?<\/h2>\n

For the 1984 Buick Regal with the 4.3L 6-cylinder Engine Code [V] V Diesel, the recommended oil viscosity depends on ambient temperature: use 10W-30 for temperatures below 16\u00b0C, 15W-40 for -18 to 16\u00b0C, and 30 weight oil for temperatures above 0\u00b0C (preferred for continuous driving). The engine requires an oil grade of CF. The total oil capacity is 7 quarts with a filter change.<\/p>\n

AMSOIL product recommendations<\/h2>\n

Based on the AMSOIL lookup data, the following products are recommended for your 1984 Buick Regal diesel engine and maintenance needs:<\/p>\n

Engine Oil Options<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nViscosity<\/th>\nProduct Code<\/th>\n<\/tr>\n
AMSOIL Signature Series 10W-30 100% Synthetic Max-Duty Diesel Oil<\/td>\n10W-30<\/a><\/td>\nDTTQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL 10W-30 Heavy-Duty 100% Synthetic Diesel Oil<\/td>\n10W-30<\/a><\/td>\nADNQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Signature Series 5W-30 100% Synthetic 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>\nProduct Code<\/th>\n<\/tr>\n
AMSOIL Oil Filter<\/td>\nEAO23-EA<\/a><\/td>\n<\/tr>\n
WIX XP Oil Filter<\/td>\n51036XP-EA<\/a><\/td>\n<\/tr>\n
WIX Oil Filter<\/td>\n51036-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>\nProduct Code<\/th>\n<\/tr>\n
Coolant<\/td>\nAMSOIL Passenger Car & Light Truck Antifreeze & Coolant<\/td>\nANTPC1G-EA<\/a><\/td>\n<\/tr>\n
Coolant<\/td>\nAMSOIL Propylene Glycol Antifreeze and Engine Coolant<\/td>\nANT1G-EA<\/a><\/td>\n<\/tr>\n
ATF<\/td>\nAMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF<\/td>\nATLPK-EA<\/a><\/td>\n<\/tr>\n
ATF<\/td>\nAMSOIL OE Fuel-Efficient 100% Synthetic ATF<\/td>\nOTLQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Specifications and Details<\/h2>\n

Proper lubrication is critical for the longevity of the 4.3L V6 diesel engine. Following the correct viscosity and capacity ensures the engine remains protected under various operating temperatures.<\/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

Oil Capacity and Torque Specs<\/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>\n26 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 to ensure accuracy.<\/em><\/p>\n

Automatic Transmission Fluid (ATF) Details<\/h2>\n

The 1984 Buick Regal with the THM700-R4 transmission requires specific fluid attention. Note that manufacturer technical service bulletins have updated specifications from Dexron II or III to Dexron VI for this application.<\/p>\n

\n\n\n\n\n
Fill Type<\/th>\nCapacity<\/th>\n<\/tr>\n
Initial Fill<\/td>\n5 quarts<\/td>\n<\/tr>\n
Total Fill (4 speed THM700-R4)<\/td>\n10.9 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant Specifications<\/h2>\n

Maintaining the cooling system is vital for high-compression diesel engines to prevent overheating.<\/p>\n

\n\n\n\n\n
Specification<\/th>\nValue<\/th>\n<\/tr>\n
Capacity<\/td>\n14.8 quarts<\/td>\n<\/tr>\n
Formulation Options<\/td>\nEthylene glycol 50\/50 pre-mix or Concentrated (requires distilled water)<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

Diesel engines face unique stresses compared to gasoline counterparts. Using high-quality synthetics can mitigate several common issues.<\/p>\n

\n\n\n\n\n\n
Concern<\/th>\nWhy it matters<\/th>\nAMSOIL product from this lookup<\/th>\nHow it may help<\/th>\nImportant limitation<\/th>\n<\/tr>\n
Engine Wear<\/td>\nHigh compression causes friction.<\/td>\nDTTQT-EA<\/a><\/td>\nDelivers up to 6X more wear protection.<\/td>\nRequires regular maintenance.<\/td>\n<\/tr>\n
Extreme Temperatures<\/td>\nViscosity changes can affect lubrication.<\/td>\nDHDQT-EA<\/a><\/td>\nExcels in extreme temperatures.<\/td>\nFollow viscosity guide for ambient temp.<\/td>\n<\/tr>\n
Contaminants<\/td>\nSmall particles cause wear.<\/td>\nEAO23-EA<\/a><\/td>\n99% efficiency at 20 microns.<\/td>\nFilter must be replaced per interval.<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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