{"id":438,"date":"2026-06-12T13:24:44","date_gmt":"2026-06-12T17:24:44","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1984-gmc-caballero-5-7l-8-cyl-diesel-maintenance-guide\/"},"modified":"2026-06-12T13:24:44","modified_gmt":"2026-06-12T17:24:44","slug":"1984-gmc-caballero-5-7l-8-cyl-diesel-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1984-gmc-caballero-5-7l-8-cyl-diesel-maintenance-guide\/","title":{"rendered":"1984 GMC Caballero 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

What oil does a 1984 GMC Caballero 5.7L Diesel take?<\/h2>\n

For the 1984 GMC Caballero with the 5.7L 8-cylinder diesel engine (Code N), the recommended oil capacity is 7 quarts with a filter change. Recommended viscosities include 10W-30 for temperatures below 16\u00b0C, 15W-40 for -18 to 16\u00b0C, and SAE 30 is preferred for temperatures above 0\u00b0C. AMSOIL recommends using their Signature Series or Heavy-Duty synthetic diesel oils for optimal protection.<\/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 Recommendations<\/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 Recommendation<\/h3>\n
\n\n\n\n
Product Name<\/th>\nProduct Code<\/th>\n<\/tr>\n
AMSOIL Oil Filter<\/td>\nEAO64-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant & Antifreeze Recommendations<\/h3>\n
\n\n\n\n\n
Product Name<\/th>\nProduct Code<\/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<\/table>\n<\/div>\n

Automatic Transmission Fluid Recommendations<\/h3>\n
\n\n\n\n\n
Product Name<\/th>\nProduct Code<\/th>\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

Maintaining the correct oil viscosity is critical for vintage diesel engines to ensure proper lubrication and protection against wear.<\/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>\nSAE 30 (Preferred)<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Capacity & 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>\n30 ft\/lbs<\/td>\n<\/tr>\n
Oil Grade<\/td>\nCF<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Note: Always check the oil level after refilling.<\/em><\/p>\n

Automatic Transmission Fluid Specifications<\/h2>\n

The 1984 GMC Caballero uses various transmission models. Note that manufacturer technical service bulletins have updated specifications from Dexron II or III to Dexron VI for these applications.<\/p>\n

Transmission Capacity & Models<\/h3>\n
\n\n\n\n\n\n\n
Transmission Model<\/th>\nTotal Fill Capacity<\/th>\nInitial Fill<\/th>\n<\/tr>\n
3-speed THM250C<\/td>\n10.8 quarts<\/td>\n4 quarts<\/td>\n<\/tr>\n
4-speed THM200-4R<\/td>\n11 quarts<\/td>\n5 quarts<\/td>\n<\/tr>\n
3-speed THM200C<\/td>\n9.4 quarts<\/td>\n3.5 quarts<\/td>\n<\/tr>\n
THM350C<\/td>\nNot confirmed from source data<\/td>\n3 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

When servicing a vintage diesel engine like the 5.7L Code N, focus on these key areas:<\/p>\n