{"id":856,"date":"2026-07-09T18:03:40","date_gmt":"2026-07-09T22:03:40","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1985-buick-electra-4-3l-6-cyl-diesel-maintenance-guide\/"},"modified":"2026-07-09T18:03:40","modified_gmt":"2026-07-09T22:03:40","slug":"1985-buick-electra-4-3l-6-cyl-diesel-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1985-buick-electra-4-3l-6-cyl-diesel-maintenance-guide\/","title":{"rendered":"1985 Buick Electra 4.3L 6-Cyl 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 Buick Electra with the 4.3L 6-cylinder Diesel engine (Engine Code T), the oil capacity is 6 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<\/strong> weight for continuous driving above 0\u00b0C. AMSOIL recommends using high-performance synthetic options like Signature Series 10W-30 Max-Duty Diesel Oil<\/a> paired with an AMSOIL or WIX oil filter<\/a>.<\/p>\n

What oil does a 1985 Buick Electra 4.3L Diesel take?<\/h2>\n

The 1985 Buick Electra with the 4.3L 6-cylinder diesel engine requires an oil grade of CF. The specific viscosity depends on your operating temperature: use 10W-30 for temperatures below 16\u00b0C, 15W-40 for between -18 to 16\u00b0C, and a 30 weight is preferred for continuous driving when temperatures are above 0\u00b0C.<\/p>\n

AMSOIL product recommendations<\/h2>\n

Based on the vehicle lookup, here are the recommended AMSOIL products for your 1985 Buick Electra diesel engine and cooling system.<\/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 10W-30 Max-Duty Diesel Oil<\/td>\n10W-30<\/a><\/td>\nDTTQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL 10W-30 Heavy-Duty Synthetic Diesel Oil<\/td>\n10W-30<\/a><\/td>\nADNQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Signature Series 5W-30 Max-Duty Diesel Oil<\/td>\n5W-30<\/a><\/td>\nDHDQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Note: Oil Grade is CF.<\/em><\/p>\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>\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 Fluid<\/h3>\n
\n\n\n\n\n\n\n
Component<\/th>\nProduct Name<\/th>\nPart Code<\/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
\n\n\n\n\n
Specification<\/th>\nDetails<\/th>\n<\/tr>\n
Oil Grade<\/td>\nCF<\/td>\n<\/tr>\n
Drain Plug Torque<\/td>\n30 ft\/lbs<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Capacity<\/h3>\n
\n\n\n\n
Condition<\/th>\nCapacity<\/th>\n<\/tr>\n
With Filter Change<\/td>\n6 quarts<\/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

For the automatic transmission (THM440-T4), the total fill capacity is 11 quarts. If you are performing an initial fill, the capacity is 6 quarts. Note that manufacturer technical service bulletins have updated this specification from Dexron II or III to Dexron VI.<\/p>\n

Transmission Fluid Details<\/h3>\n
\n\n\n\n\n
Component<\/th>\nCapacity<\/th>\n<\/tr>\n
THM440-T4 Total Fill<\/td>\n11 quarts<\/td>\n<\/tr>\n
THM440-T4 Initial Fill<\/td>\n6 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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