{"id":372,"date":"2026-06-05T08:30:35","date_gmt":"2026-06-05T12:30:35","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1984-mercedes-benz-300d-3-0l-5-cyl-diesel-turbo-maintenance-guide\/"},"modified":"2026-06-05T08:30:35","modified_gmt":"2026-06-05T12:30:35","slug":"1984-mercedes-benz-300d-3-0l-5-cyl-diesel-turbo-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1984-mercedes-benz-300d-3-0l-5-cyl-diesel-turbo-maintenance-guide\/","title":{"rendered":"1984 Mercedes Benz 300d 3.0L 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

For the 1984 Mercedes Benz 300d with the 3.0L 5-cylinder diesel turbo engine, the oil capacity is 8.5 quarts (with filter). Recommended viscosities include 0W-30 or 0W-40 for all temperatures, 10W-40 for temperatures above -20\u00b0C, and 5W-30, 5W-40, or 5W-50 for temperatures above -25\u00b0C. AMSOIL recommends AMSOIL 5W-40 FS 100% Synthetic European Motor Oil<\/a> (EFMQT-EA<\/a>) for this application.<\/p>\n

What oil does a 1984 Mercedes Benz 300d take?<\/h2>\n

The 1984 Mercedes Benz 300d requires specific oil viscosities based on operating temperatures. The AMSOIL lookup oil grade is SEO41. For all temperatures, 0W-30 and 0W-40 are suitable. If temperatures remain above -20\u00b0C, 10W-40 is appropriate; for temperatures above -25\u00b0C, you may use 5W-30, 5W-40, or 5W-50.<\/p>\n

The oil capacity is 8.5 quarts when performing a service with the filter. Note that on models equipped with an oil cooler, additional oil may be required if the cooler is drained during service. Always allow 5 minutes after refilling or turning the engine off before checking the oil level.<\/p>\n

AMSOIL product recommendations<\/h2>\n

Based on the vehicle specifications, AMSOIL provides several high-performance lubrication and additive options to support the longevity of your Mercedes diesel engine.<\/p>\n

Engine Oil Recommendations<\/h3>\n
\n\n\n\n\n
Product Name<\/th>\nPart Code<\/th>\n<\/tr>\n
AMSOIL 5W-40 FS 100% Synthetic European Motor Oil<\/td>\nEFMQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL 0W-40 FS 100% Synthetic European Motor Oil<\/td>\nEFOQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant & Brake Fluid<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nPart 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
AMSOIL DOT 3 and DOT 4 100% Synthetic Brake Fluid<\/td>\nBFLVCN-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Transmission & Steering Fluids<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nPart Code<\/th>\n<\/tr>\n
AMSOIL Signature Series Multi-Vehicle ATF<\/td>\nATFPK-EA<\/a><\/td>\n<\/tr>\n
AMSOIL OE Multi-Vehicle ATF<\/td>\nOTFQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL 100% Synthetic Multi-Vehicle Power Steering Fluid<\/td>\nPSFCN-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Diesel Fuel Additives<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nPart Code<\/th>\n<\/tr>\n
AMSOIL Diesel Injector Clean<\/td>\nADFPCN-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Diesel Cetane Boost<\/td>\nACBCN-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Diesel Injector Clean + Cetane Boost<\/td>\nADSCN-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Specifications<\/h3>\n
\n\n\n\n\n\n
Viscosity Range<\/th>\nTemperature Condition<\/th>\n<\/tr>\n
0W-30, 0W-40<\/td>\nAll Temperatures<\/td>\n<\/tr>\n
10W-40<\/td>\nAbove -20\u00b0C<\/td>\n<\/tr>\n
5W-30, 5W-40, 5W-50<\/td>\nAbove -25\u00b0C<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Capacity and Torque<\/h3>\n