{"id":795,"date":"2026-07-07T00:22:41","date_gmt":"2026-07-07T04:22:41","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1985-chevrolet-blazer-6-2l-8-cyl-diesel-maintenance-guide\/"},"modified":"2026-07-07T00:22:41","modified_gmt":"2026-07-07T04:22:41","slug":"1985-chevrolet-blazer-6-2l-8-cyl-diesel-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1985-chevrolet-blazer-6-2l-8-cyl-diesel-maintenance-guide\/","title":{"rendered":"1985 Chevrolet Blazer 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 1985 Chevrolet Blazer 6.2L Diesel take?<\/h2>\n

For the 1985 Chevrolet Blazer with the 6.2L 8-cylinder diesel engine (Engine Code C), the recommended oil capacity is 7 quarts with a filter change. Preferred viscosity is SAE 10W-30 for temperatures above -18\u00b0C. AMSOIL recommends using Signature Series 10W-30 100% Synthetic Max-Duty Diesel Oil<\/a> (DTTQT-EA<\/a>) or Signature Series 5W-30<\/a> (DHDQT-EA<\/a>) depending on ambient temperatures.<\/p>\n

AMSOIL product recommendations<\/h2>\n

The following AMSOIL products are listed for the 1985 Chevrolet Blazer 6.2L Diesel to support engine longevity and performance.<\/p>\n

Engine Oil Options<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nViscosity<\/th>\nCode<\/th>\n<\/tr>\n
Signature Series Max-Duty Diesel Oil<\/a><\/td>\n10W-30<\/a><\/td>\nDTTQT-EA<\/a><\/td>\n<\/tr>\n
Heavy-Duty Synthetic Diesel Oil<\/a><\/td>\n10W-30<\/a><\/td>\nADNQT-EA<\/a><\/td>\n<\/tr>\n
Signature Series Max-Duty Diesel Oil<\/a><\/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
Product Name<\/th>\nCode<\/th>\n<\/tr>\n
AMSOIL Oil Filter<\/a><\/td>\nEAO24-EA<\/a><\/td>\n<\/tr>\n
WIX Oil Filter<\/a><\/td>\n51061-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant & Transmission Fluids<\/h3>\n
\n\n\n\n\n\n\n
Product Name<\/th>\nCode<\/th>\n<\/tr>\n
Passenger Car & Light Truck Antifreeze<\/a><\/td>\nANTPC1G-EA<\/a><\/td>\n<\/tr>\n
Propylene Glycol Antifreeze<\/a><\/td>\nANT1G-EA<\/a><\/td>\n<\/tr>\n
Signature Series Fuel-Efficient ATF<\/a><\/td>\nATLPK-EA<\/a><\/td>\n<\/tr>\n
OE Fuel-Efficient ATF<\/a><\/td>\nOTLQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Note: Air filter recommendations are not available from the source data.<\/em><\/p>\n

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

Maintaining correct oil viscosity is critical for the 6.2L diesel engine to ensure proper lubrication across varying temperature ranges.<\/p>\n

Oil Viscosity Guide<\/h3>\n
\n\n\n\n\n\n\n\n
Temperature Range<\/th>\nRecommended Viscosity<\/th>\n<\/tr>\n
Above -18\u00b0C<\/td>\n10W-30 (SAE 10W-30 preferred)<\/td>\n<\/tr>\n
Above -12\u00b0C<\/td>\n15W-40<\/td>\n<\/tr>\n
Above -7\u00b0C<\/td>\n20W-20<\/td>\n<\/tr>\n
Above 4\u00b0C<\/td>\n30<\/td>\n<\/tr>\n
Below 16\u00b0C<\/td>\n5W-30<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Oil Specification:<\/strong> The AMSOIL lookup note specifies an oil grade of CF-4 for this application.<\/p>\n

Service Capacities & Torque<\/h3>\n
\n\n\n\n\n
Component<\/th>\nCapacity \/ Spec<\/th>\n<\/tr>\n
Engine Oil Capacity<\/td>\n7 quarts (with filter)<\/td>\n<\/tr>\n
Oil Drain Plug Torque<\/td>\n13-20 ft\/lbs<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

Transmission Fluid Specifications<\/h2>\n

The 1985 Chevrolet Blazer utilizes different automatic transmissions requiring specific fluid types and capacities.<\/p>\n

THM400 Transmission<\/h3>\n