{"id":846,"date":"2026-07-09T09:58:28","date_gmt":"2026-07-09T13:58:28","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2021-ford-f-350-pickup-6-7l-8-cyl-diesel-turbo-maintenance-guide\/"},"modified":"2026-07-09T09:58:28","modified_gmt":"2026-07-09T13:58:28","slug":"2021-ford-f-350-pickup-6-7l-8-cyl-diesel-turbo-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2021-ford-f-350-pickup-6-7l-8-cyl-diesel-turbo-maintenance-guide\/","title":{"rendered":"2021 Ford F-350 6.7L Power Stroke Diesel Oil & Filter Guide"},"content":{"rendered":"
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\"AMSOIL
AMSOIL diesel oil guide for trucks, vans, SUVs and diesel engines<\/figcaption><\/figure>\n

For the 2021 Ford F-350 Pickup with the 6.7L 8-cylinder Engine Code [T] X Diesel Turbo, the oil capacity is 13 quarts<\/strong> (including filter replacement). Recommended viscosities vary by temperature and usage: 0W-40 for all temperatures, or 10W-30\/5W-40 depending on manufacturer recommendations for normal versus severe operations. AMSOIL recommends using Signature Series 10W-30 Max-Duty Diesel Oil<\/a> (DTTQT-EA<\/a>) paired with an AMSOIL Oil Filter<\/a> (EAO98-EA<\/a>).<\/p>\n

What oil does a 2021 Ford F-350 6.7L Diesel take?<\/h2>\n

The viscosity required for your engine depends on ambient temperatures and operating conditions. The manufacturer recommends 10W-30 for normal usage and 5W-40 for severe operations. If you are using biodiesel fuel blends (up to B20 max), the use of 5W-40 or 15W-40 oil is recommended.<\/p>\n

The total engine oil capacity for the 2021 Ford F-350 6.7L Diesel is 13 quarts<\/strong> when replacing the oil filter. It is essential to check the oil level after refilling to ensure accuracy.<\/p>\n

AMSOIL product recommendations<\/h2>\n

To simplify maintenance for your Ford Power Stroke, AMSOIL provides high-performance synthetic options and complete oil change kits designed to meet or exceed heavy-duty requirements.<\/p>\n

Engine Oil Recommendations<\/h3>\n
\n\n\n\n\n
Product Name<\/th>\nPart Number<\/th>\n<\/tr>\n
AMSOIL Signature Series 10W-30 100% Synthetic Max-Duty Diesel Oil<\/td>\nDTTQT-EA<\/a><\/td>\n<\/tr>\n
AMSOIL 10W-30 Heavy-Duty 100% Synthetic Diesel Oil<\/td>\nADNQT-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Filter Recommendations<\/h3>\n
\n\n\n\n\n
Product Name<\/th>\nPart Number<\/th>\n<\/tr>\n
AMSOIL Oil Filter<\/td>\nEAO98-EA<\/a><\/td>\n<\/tr>\n
WIX Oil Filter<\/td>\n57151-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Air Filter Recommendations<\/h3>\n
\n\n\n\n\n
Product Name<\/th>\nPart Number<\/th>\n<\/tr>\n
WIX Air Filter (Rectangular Panel)<\/td>\nWA10905-EA<\/a><\/td>\n<\/tr>\n
WIX Air Filter (Foam Insert)<\/td>\nWA11053-EA<\/a><\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Engine Oil Viscosity Guide<\/h3>\n
\n\n\n\n\n\n\n
Temperature Range<\/th>\nRecommended Viscosity<\/th>\n<\/tr>\n
All Temperatures<\/td>\n0W-40<\/td>\n<\/tr>\n
Above -18\u00b0C<\/td>\n10W-30<\/td>\n<\/tr>\n
Above -7\u00b0C<\/td>\n15W-40<\/td>\n<\/tr>\n
Above -29\u00b0C<\/td>\n5W-40<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Note: For severe operations, the manufacturer recommends 5W-40.<\/em><\/p>\n

How much oil does it take with a filter change?<\/h2>\n

Oil Change Specifications<\/h3>\n
\n\n\n\n\n\n
Specification<\/th>\nValue<\/th>\n<\/tr>\n
Capacity (with filter)<\/td>\n13 Quarts<\/td>\n<\/tr>\n
Oil Drain Plug Torque<\/td>\n19 ft\/lbs<\/td>\n<\/tr>\n
AMSOIL Lookup Oil Grade<\/td>\nSEO84<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

Common diesel oil-related concerns and how AMSOIL products may help<\/h2>\n

Diesel engines operating under heavy loads face unique lubrication challenges. The following table outlines how specific AMSOIL products can support engine longevity.<\/p>\n

\n\n\n\n\n\n
Concern<\/th>\nWhy it matters<\/th>\nAMSOIL Product<\/th>\nHow it may help<\/th>\nLimitation<\/th>\n<\/tr>\n
Engine Wear<\/td>\nHigh-pressure diesel environments cause friction.<\/td>\nDTTQT-EA<\/a><\/td>\nDelivers up to 6X more wear protection.<\/td>\nRequires regular oil changes.<\/td>\n<\/tr>\n
Contaminants<\/td>\nSmall particles can cause abrasive wear.<\/td>\nEAO98-EA<\/a><\/td>\n99% efficiency at 20 microns.<\/td>\nFilter must be replaced per schedule.<\/td>\n<\/tr>\n
Extreme Temperatures<\/td>\nViscosity changes can affect lubrication.<\/td>\nDTTQT-EA<\/a><\/td>\nExcels in extreme temperatures.<\/td>\nNot a substitute for correct viscosity selection.<\/td>\n<\/tr>\n<\/table>\n<\/div>\n

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

Maintaining a 6.7L Power Stroke requires attention to several key systems. Owners should focus on the integrity of the diesel fuel system, turbocharger components, and cooling systems. Because these engines are designed for rigorous duty cycles in construction or heavy towing, regular inspections of suspension and braking systems are also standard practice due to the increased weight of the F-350.<\/p>\n

Common maintenance concerns for this vehicle<\/h2>\n

While specific defects are not listed in the provided research, owners of high-capacity diesel trucks should routinely monitor:<\/p>\n