{"id":727,"date":"2026-07-02T11:31:40","date_gmt":"2026-07-02T15:31:40","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2018-gmc-terrain-1-6l-4-cyl-diesel-turbo-maintenance-guide\/"},"modified":"2026-07-02T11:31:40","modified_gmt":"2026-07-02T15:31:40","slug":"2018-gmc-terrain-1-6l-4-cyl-diesel-turbo-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2018-gmc-terrain-1-6l-4-cyl-diesel-turbo-maintenance-guide\/","title":{"rendered":"2018 GMC Terrain 1.6L Diesel Maintenance Guide: Oil, Filters & Fluids"},"content":{"rendered":"
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AMSOIL diesel oil guide for trucks, vans, SUVs and diesel engines<\/figcaption><\/figure>\n

Quick Summary for 2018 GMC Terrain 1.6L Diesel Owners<\/h2>\n

For the 2018 GMC Terrain with the 1.6L 4-cylinder diesel engine (Engine Code [U] LH7 U), the oil capacity is 5.3 quarts<\/strong> with a filter change. The recommended viscosity for all temperatures is 5W-30<\/strong>, though 0W-40 is suggested for temperatures below -29\u00b0C. AMSOIL recommends using AMSOIL 5W-30 100% Synthetic Diesel Oil<\/a> (DP530QT-EA<\/a>) paired with an AMSOIL Oil Filter<\/a> (EA15K35-EA<\/a>) for optimal protection.<\/p>\n

What oil does a 2018 GMC Terrain 1.6L Diesel take?<\/h2>\n

The 2018 GMC Terrain with the 1.6L diesel engine requires an oil grade of SEOA5. For standard operation across all temperatures, a 5W-30 viscosity is recommended. If you are operating in extreme cold (below -29\u00b0C), 0W-40 is suggested. The AMSOIL lookup note mentions that vehicles originally using GM Dexos2 may use a GM Dexos D licensed engine oil of the appropriate viscosity grade.<\/p>\n

AMSOIL Product Recommendations<\/h2>\n

Based on the AMSOIL lookup data, the following products are recommended for your 2018 GMC Terrain diesel engine and related components:<\/p>\n

Engine Oil & Filter<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nPart Number<\/th>\n<\/tr>\n
AMSOIL 5W-30 100% Synthetic Diesel Oil<\/td>\nDP530QT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Oil Filter<\/td>\nEA15K35-EA<\/a><\/td>\n<\/tr>\n
WIX Oil Filter<\/td>\nWL10331-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>\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

Transfer Case Lubricant<\/h3>\n
\n\n\n\n
Product Name<\/th>\nPart Number<\/th>\n<\/tr>\n
AMSOIL SEVERE GEAR\u00ae 75W-90 100% Synthetic Gear Lube<\/td>\nSVGPK-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Specifications<\/h3>\n
\n\n\n\n\n
Viscosity<\/th>\nCondition\/Note<\/th>\n<\/tr>\n
5W-30<\/td>\nAll Temperatures<\/td>\n<\/tr>\n
0W-40<\/td>\nBelow -29\u00b0C<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

AMSOIL lookup oil grade:<\/strong> SEOA5<\/p>\n

Engine Oil Capacity & Torque<\/h3>\n
\n\n\n\n\n
Description<\/th>\nValue<\/th>\n<\/tr>\n
Oil Capacity (with filter)<\/td>\n5.3 quarts<\/td>\n<\/tr>\n
Oil Drain Plug Torque<\/td>\n18 ft\/lbs<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

How much transmission and coolant fluid is required?<\/h2>\n

The automatic transmission (6T45) requires a total fill of 9 quarts, with an initial fill capacity of approximately 4.2 quarts (actual capacity ranges between 4.0-6.0 liters). The engine cooling system has a capacity of 7.9 quarts.<\/p>\n

Automatic Transmission Fluid (6T45)<\/h3>\n
\n\n\n\n\n
Fill Type<\/th>\nCapacity<\/th>\n<\/tr>\n
Total Fill<\/td>\n9 quarts<\/td>\n<\/tr>\n
Initial Fill<\/td>\n4.2 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant Capacity<\/h3>\n
\n\n\n\n
Component<\/th>\nCapacity<\/th>\n<\/tr>\n
Engine Coolant<\/td>\n7.9 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Transfer Case Maintenance<\/h2>\n

For vehicles equipped with the AAM transfer case (AAM….SL136), the capacity is 1.7 pints. It is critical to replace the drain plug with a new one after each removal.<\/p>\n

\n\n\n\n\n\n
Specification<\/th>\nValue<\/th>\n<\/tr>\n
Transfer Case Capacity<\/td>\nAAM 1.7 pints<\/td>\n<\/tr>\n
Drain Plug Torque<\/td>\n30 ft\/lbs<\/td>\n<\/tr>\n
Fill Plug Torque<\/td>\n30 ft\/lbs<\/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 such as high soot loading and thermal extremes. 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>\nImportant Limitation<\/th>\n<\/tr>\n
Engine Wear<\/td>\nHigh-pressure diesel environments cause friction.<\/td>\nDP530QT-EA<\/a><\/td>\nDelivers up to 6X more wear protection than leading industry standards.<\/td>\nRequires regular oil changes.<\/td>\n<\/tr>\n
Contaminants<\/td>\nSmall particles can cause abrasive wear.<\/td>\nEA15K35-EA<\/a><\/td>\n99% filtering efficiency at 20 microns.<\/td>\nFilter must be replaced per service interval.<\/td>\n<\/tr>\n
Extreme Temps<\/td>\nViscosity changes affect lubrication.<\/td>\nDP530QT-EA<\/a><\/td>\nExcels in hot and cold temperature extremes.<\/td>\nNot a substitute for correct viscosity selection.<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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