{"id":596,"date":"2026-06-23T20:25:28","date_gmt":"2026-06-24T00:25:28","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1987-gmc-jimmy-6-2l-8-cyl-diesel-maintenance-guide\/"},"modified":"2026-06-23T20:25:28","modified_gmt":"2026-06-24T00:25:28","slug":"1987-gmc-jimmy-6-2l-8-cyl-diesel-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1987-gmc-jimmy-6-2l-8-cyl-diesel-maintenance-guide\/","title":{"rendered":"1987 GMC Jimmy 6.2L Diesel Oil & Maintenance Guide"},"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 1987 GMC Jimmy 6.2L Diesel take?<\/h2>\n

For the 1987 GMC Jimmy with the 6.2L 8-cylinder Engine Code [C] Diesel, the recommended oil viscosity is SAE 5W-30, which is preferred for all temperatures. The engine oil capacity is 7 quarts when performing a change with a new filter. AMSOIL recommends using Signature Series 5W-30 100% Synthetic Max-Duty Diesel Oil<\/a> (DHDQT-EA<\/a>) for optimal protection.<\/p>\n

AMSOIL product recommendations<\/h2>\n

Based on the AMSOIL lookup for your 1987 GMC Jimmy 6.2L Diesel, the following products are recommended to maintain engine and system health.<\/p>\n

Engine Oil & Filter<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nPart Number<\/th>\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>\nEAO24-EA<\/a><\/td>\n<\/tr>\n
WIX Oil Filter<\/td>\n51061-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant & Transmission<\/h3>\n
\n\n\n\n\n\n\n
Product Name<\/th>\nPart Number<\/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

Air & Fuel Filters<\/h3>\n

No specific air filter or fuel filter recommendations are available from the source data for this vehicle.<\/p>\n

Engine Oil Specifications<\/h2>\n

Proper lubrication is critical for the longevity of the 6.2L diesel engine. Always verify your current oil level after a refill.<\/p>\n

Oil Viscosity & Grade<\/h3>\n
\n\n\n\n\n\n\n
Condition<\/th>\nViscosity\/Grade<\/th>\n<\/tr>\n
Preferred (All Temps)<\/td>\nSAE 5W-30<\/td>\n<\/tr>\n
Above -18\u00b0C<\/td>\n10W-30<\/td>\n<\/tr>\n
Above 4\u00b0C<\/td>\n30<\/td>\n<\/tr>\n
Oil Grade<\/td>\nCF-4<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Oil Capacity<\/h3>\n
\n\n\n\n
Description<\/th>\nCapacity<\/th>\n<\/tr>\n
With Filter Change<\/td>\n7 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

Automatic Transmission Fluid Details<\/h2>\n

The 1987 GMC Jimmy utilizes specific automatic transmissions that require careful fluid selection. Note that manufacturer technical service bulletins may have updated specifications.<\/p>\n

THM400 (3-Speed)<\/h3>\n
\n\n\n\n\n
Type<\/th>\nCapacity<\/th>\n<\/tr>\n
Initial Fill<\/td>\n4.3 quarts<\/td>\n<\/tr>\n
Total Fill<\/td>\n10.6 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Note:<\/strong> The AMSOIL lookup notes that this specification has been updated from Dexron II or III to Dexron VI per a manufacturer Technical Service Bulletin.<\/p>\n

THM700-R4 (4-Speed)<\/h3>\n
\n\n\n\n\n
Type<\/th>\nCapacity<\/th>\n<\/tr>\n
Initial Fill<\/td>\n5 quarts<\/td>\n<\/tr>\n
Total Fill<\/td>\n11.5 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Note:<\/strong> The AMSOIL lookup notes that this specification has been updated from Dexron II or III to Dexron VI per a manufacturer Technical Service Bulletin.<\/p>\n

Coolant Specifications<\/h2>\n

Maintaining the cooling system is vital for thermal management in diesel engines. The total capacity for the cooling system is 24.8 quarts.<\/p>\n

\n\n\n\n\n
Product Type<\/th>\nFormulation Note<\/th>\n<\/tr>\n
AMSOIL Passenger Car & Light Truck<\/td>\nEthylene glycol 50\/50 pre-mix<\/td>\n<\/tr>\n
AMSOIL Propylene Glycol<\/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

Diesel engines face unique stresses including soot loading and extreme temperature fluctuations. The following table outlines how specific AMSOIL products can support your maintenance needs.<\/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 combustion creates high pressure and friction.<\/td>\nDHDQT-EA<\/a><\/td>\nDelivers 6X more wear protection based on Detroit Diesel testing.<\/td>\nRequires regular oil changes.<\/td>\n<\/tr>\n
Contaminants<\/td>\nSmall particles can cause abrasive wear.<\/td>\nEAO24-EA<\/a><\/td>\nProvides 99% filtering efficiency at 20 microns.<\/td>\nFilter must be replaced per interval.<\/td>\n<\/tr>\n
Extreme Temps<\/td>\nViscosity changes can affect lubrication during startup or heavy load.<\/td>\nDHDQT-EA<\/a><\/td>\nExcels in extreme temperatures and maintains proper thickness.<\/td>\nNot confirmed for all specific ambient conditions.<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

Owners of 1980s GM diesel engines should prioritize fuel system integrity and cooling system efficiency. These engines are sensitive to fuel quality and require consistent maintenance of glow plugs, fuel filters, and injection components. Because these vehicles were often used for utility or towing, inspecting suspension components and drivetrain seals is a common research topic for long-term preservation.<\/p>\n

Common maintenance concerns for this vehicle<\/h2>\n

Based on owner reports and historical context, the following areas should be monitored:<\/p>\n