{"id":735,"date":"2026-07-03T00:51:27","date_gmt":"2026-07-03T04:51:27","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2008-gmc-savana-3500-6-6l-8-cyl-diesel-turbo-maintenance-guide\/"},"modified":"2026-07-03T00:51:27","modified_gmt":"2026-07-03T04:51:27","slug":"2008-gmc-savana-3500-6-6l-8-cyl-diesel-turbo-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2008-gmc-savana-3500-6-6l-8-cyl-diesel-turbo-maintenance-guide\/","title":{"rendered":"2008 GMC Savana 3500 6.6L LMM Diesel Maintenance Guide & Oil Specs"},"content":{"rendered":"
\n
\n
\"AMSOIL
AMSOIL diesel oil guide for trucks, vans, SUVs and diesel engines<\/figcaption><\/figure>\n

What oil does a 2008 GMC Savana 3500 6.6L LMM Diesel take?<\/h2>\n

The 2008 GMC Savana 3500 with the 6.6L LMM diesel engine requires an oil viscosity of SAE 15W-40 for temperatures above -18\u00b0C (0\u00b0F). For improved cold starting in ambient temperatures below 0\u00b0F (-18\u00b0C), use 5W-40. The engine oil capacity is 10 quarts with a filter change, and the oil drain plug should be torqued to 62 ft\/lbs.<\/p>\n

AMSOIL product recommendations<\/h2>\n

Based on the AMSOIL lookup for your 2008 GMC Savana 3500, here are the recommended fluids and filters to maintain peak performance.<\/p>\n

Engine Oil Recommendations<\/h3>\n
\n\n\n\n\n
Product Name<\/th>\nCode<\/th>\n<\/tr>\n
AMSOIL Signature Series 15W-40 100% Synthetic Max-Duty Diesel Oil<\/td>\nDMEQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL 15W-40 Heavy-Duty 100% Synthetic Diesel Oil<\/td>\nADPQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Oil Filter Options<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nCode<\/th>\n<\/tr>\n
AMSOIL Oil Filter<\/td>\nEAO52-EA<\/a><\/td>\n<\/tr>\n
WIX XP Oil Filter<\/td>\n57202XP-EA<\/a><\/td>\n<\/tr>\n
WIX Oil Filter<\/td>\n57202-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Coolant & Transmission Fluid<\/h3>\n
\n\n\n\n\n\n\n
Component<\/th>\nProduct Name<\/th>\nCode<\/th>\n<\/tr>\n
Coolant<\/td>\nAMSOIL Passenger Car & Light Truck Antifreeze & Coolant<\/td>\nANTPC1G-EA<\/a><\/td>\n<\/tr>\n
Coolant<\/td>\nAMSOIL Propylene Glycol Antifreeze and Engine Coolant<\/td>\nANT1G-EA<\/a><\/td>\n<\/tr>\n
ATF<\/td>\nAMSOIL Signature Series Fuel-Efficient 100% Synthetic ATF<\/td>\nATLPK-EA<\/a><\/td>\n<\/tr>\n
ATF<\/td>\nAMSOIL OE Fuel-Efficient 100% Synthetic ATF<\/td>\nOTLQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

Proper lubrication is critical for the LMM diesel engine to prevent wear and manage soot. Always verify your specific requirements against the owner’s manual.<\/p>\n

Oil Viscosity & Grade<\/h3>\n
\n\n\n\n\n
Condition<\/th>\nRecommended Viscosity<\/th>\n<\/tr>\n
Above -18\u00b0C<\/td>\nSAE 15W-40 (Preferred)<\/td>\n<\/tr>\n
Below -18\u00b0C (0\u00b0F)<\/td>\n5W-40 (For improved cold starting)<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Oil Specification:<\/strong> CJ-4<\/p>\n

Oil Capacity & Torque<\/h3>\n
\n\n\n\n\n
Metric<\/th>\nValue<\/th>\n<\/tr>\n
Capacity (with filter)<\/td>\n10 quarts<\/td>\n<\/tr>\n
Oil Drain Plug Torque<\/td>\n62 ft\/lbs<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

Automatic Transmission Fluid (ATF) Specifications<\/h2>\n

The 2008 GMC Savana 3500 utilizes specific transmission configurations that require appropriate fluid for smooth shifting and heat management.<\/p>\n

Transmission Capacities<\/h3>\n
\n\n\n\n\n
Transmission Type<\/th>\nTotal Fill Capacity<\/th>\nInitial Fill<\/th>\n<\/tr>\n
4L85-E<\/td>\n13.5 quarts<\/td>\n7.7 quarts<\/td>\n<\/tr>\n
4L80-E<\/td>\n13.5 quarts<\/td>\n7.7 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Fluid Specification:<\/strong> The AMSOIL lookup note references AF6 for these applications.<\/p>\n

Coolant Specifications<\/h2>\n

Maintaining the cooling system is vital for heavy-duty diesel operation to prevent corrosion and overheating.<\/p>\n

\n\n\n\n\n
Configuration<\/th>\nCapacity<\/th>\n<\/tr>\n
With AUX Heater<\/td>\n22.5 quarts<\/td>\n<\/tr>\n
Without AUX Heater<\/td>\n21 quarts<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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