{"id":186,"date":"2026-05-19T20:59:35","date_gmt":"2026-05-20T00:59:35","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/?p=186"},"modified":"2026-05-19T20:59:37","modified_gmt":"2026-05-20T00:59:37","slug":"1981-toyota-land-cruiser-3-4l-4-cyl-diesel-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/1981-toyota-land-cruiser-3-4l-4-cyl-diesel-maintenance-guide\/","title":{"rendered":"1981 Toyota Land Cruiser 3.4L 4-Cyl Diesel (3B D) 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 1981 Toyota Land Cruiser 3.4L Diesel take?<\/h2>\n

For the 1981 Toyota Land Cruiser with the 3.4L 4-cylinder 3B D Diesel engine, the required oil capacity is 7.1 quarts<\/strong> (including filter). Recommended viscosities depend on ambient temperature: use 5W-30 for temperatures below 10\u00b0C, and 10W-30, 10W-40, or 10W-50 for temperatures above -23\u00b0C. AMSOIL recommends using high-quality synthetic diesel oils like Signature Series 10W-30<\/a> or Signature Series 5W-40<\/a> for superior protection.<\/p>\n

AMSOIL product recommendations<\/h2>\n

The following AMSOIL products are recommended for your 1981 Toyota Land Cruiser 3B D Diesel engine and maintenance needs based on available application data.<\/p>\n

Engine Oil Options<\/h3>\n
\n\n\n\n\n\n\n
Product Name<\/th>\nViscosity<\/th>\nProduct Code<\/th>\n<\/tr>\n
AMSOIL Signature Series 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 Max-Duty Diesel Oil<\/td>\n5W-30<\/a><\/td>\nDHDQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Signature Series Max-Duty Diesel Oil<\/td>\n5W-40<\/a><\/td>\nDEOQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Oil Specification:<\/strong> CF (AMSOIL lookup oil grade)<\/p>\n

Oil Filter Options<\/h3>\n
\n\n\n\n\n
Product Name<\/th>\nProduct Code<\/th>\n<\/tr>\n
AMSOIL Oil Filter<\/td>\nEAO15-EA<\/a><\/td>\n<\/tr>\n
WIX Oil Filter<\/td>\n51515-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant & Antifreeze<\/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

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

Proper lubrication is critical for the longevity of the 3B D diesel engine. Below are the confirmed technical details for your oil service.<\/p>\n

Oil Viscosity Guide<\/h3>\n
\n\n\n\n\n\n
Temperature Range<\/th>\nRecommended Viscosity<\/th>\n<\/tr>\n
Above -23\u00b0C<\/td>\n10W-30, 10W-40, 10W-50<\/td>\n<\/tr>\n
Above -12\u00b0C<\/td>\n15W-40, 20W-40, 20W-50<\/td>\n<\/tr>\n
Below 10\u00b0C<\/td>\n5W-30<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Oil Capacity<\/h3>\n
\n\n\n\n
Description<\/th>\nCapacity<\/th>\n<\/tr>\n
Total capacity with filter change<\/td>\n7.1 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

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