{"id":513,"date":"2026-06-17T12:38:26","date_gmt":"2026-06-17T16:38:26","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2008-ford-f-550-pickup-6-4l-8-cyl-diesel-turbo-maintenance-guide\/"},"modified":"2026-06-17T12:38:26","modified_gmt":"2026-06-17T16:38:26","slug":"2008-ford-f-550-pickup-6-4l-8-cyl-diesel-turbo-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2008-ford-f-550-pickup-6-4l-8-cyl-diesel-turbo-maintenance-guide\/","title":{"rendered":"2008 Ford F-550 6.4L Power Stroke 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 2008 Ford F-550 6.4L Power Stroke take?<\/h2>\n

The 2008 Ford F-550 with the 6.4L 8-cylinder Engine Code R Diesel Turbo requires an oil capacity of 15 quarts (including the filter). Recommended viscosities depend on ambient temperature: 0W-30 or 0W-40 for temperatures below 10\u00b0C; 10W-30 for -18 to 10\u00b0C; and 5W-40 or 15W-40 for temperatures above -29\u00b0C. For heavy-duty driving and trailer towing, 5W-40 or 15W-40 must be used.<\/p>\n

AMSOIL product recommendations<\/h2>\n

Based on the AMSOIL lookup data, the following products are recommended for your 2008 Ford F-550 6.4L diesel engine to support performance and longevity.<\/p>\n

Engine Oil Options<\/h3>\n
\n\n\n\n\n\n\n
Product Name<\/th>\nViscosity<\/th>\nPart Number<\/th>\n<\/tr>\n
AMSOIL Signature Series Max-Duty Diesel Oil<\/td>\n10W-30<\/a><\/td>\nDTTQT-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
AMSOIL Heavy-Duty Synthetic Diesel Oil<\/td>\n10W-30<\/a><\/td>\nADNQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL Heavy-Duty Synthetic Diesel Oil<\/td>\n5W-40<\/a><\/td>\nADOQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Oil Filter Options<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nPart Number<\/th>\n<\/tr>\n
AMSOIL Oil Filter [1]<\/td>\nEA15K88-EA<\/a><\/td>\n<\/tr>\n
WIX XP Oil Filter<\/td>\n57312XP-EA<\/a><\/td>\n<\/tr>\n
AMSOIL SDF88 Oil Filter<\/td>\nSDF88-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Other Essential Fluids & Filters<\/h3>\n
\n\n\n\n\n\n
Component<\/th>\nProduct Name<\/th>\nPart Number<\/th>\n<\/tr>\n
Air Filter<\/td>\nDonaldson P-Series Heavy Duty<\/td>\nP613522-EA<\/a><\/td>\n<\/tr>\n
Coolant<\/td>\nAMSOIL Passenger Car & Light Truck Antifreeze<\/td>\nANTPC1G-EA<\/a><\/td>\n<\/tr>\n
Coolant<\/td>\nAMSOIL Propylene Glycol Antifreeze<\/td>\nANT1G-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

Proper lubrication is critical for the 6.4L Power Stroke engine, especially under heavy loads. Always verify your specific operating temperature to select the correct viscosity.<\/p>\n

Oil Viscosity Guide<\/h3>\n
\n\n\n\n\n\n\n
Temperature Range<\/th>\nRecommended Viscosity<\/th>\n<\/tr>\n
Below 10\u00b0C<\/td>\n0W-30, 0W-40<\/td>\n<\/tr>\n
-18 to 10\u00b0C<\/td>\n10W-30<\/td>\n<\/tr>\n
Above -29\u00b0C<\/td>\n5W-40 (Use 5W-40 or 15W-40 for heavy duty\/towing)<\/td>\n<\/tr>\n
Above -7\u00b0C<\/td>\n15W-40 (Use 5W-40 or 15W-40 for heavy duty\/towing)<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Maintenance Specifications<\/h3>\n