{"id":871,"date":"2026-07-10T06:34:24","date_gmt":"2026-07-10T10:34:24","guid":{"rendered":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2018-ford-f-250-hd-pickup-6-7l-8-cyl-diesel-turbo-maintenance-guide\/"},"modified":"2026-07-10T06:34:24","modified_gmt":"2026-07-10T10:34:24","slug":"2018-ford-f-250-hd-pickup-6-7l-8-cyl-diesel-turbo-maintenance-guide","status":"publish","type":"post","link":"https:\/\/www.worldsbestdieseloil.com\/oil-guide\/2018-ford-f-250-hd-pickup-6-7l-8-cyl-diesel-turbo-maintenance-guide\/","title":{"rendered":"2018 Ford F-250 HD 6.7L Diesel Oil & Filter Guide: Capacity and Recommendations"},"content":{"rendered":"
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AMSOIL diesel oil guide for trucks, vans, SUVs and diesel engines<\/figcaption><\/figure>\n

For the 2018 Ford F-250 HD Pickup with the 6.7L 8-cylinder Engine Code [T] O Diesel Turbo, the engine oil capacity is 13 quarts<\/strong> (including filter replacement). The manufacturer recommends 10W-30 for normal usage and 5W-40 for severe operations. AMSOIL recommends using Signature Series Max-Duty Synthetic Diesel Oil<\/strong> in either 10W-30 or 5W-40 viscosity to ensure superior engine protection.<\/p>\n

What oil does a 2018 Ford F-250 HD 6.7L Diesel take?<\/h2>\n

The 2018 Ford F-250 with the 6.7L diesel engine requires specific viscosities depending on your operating environment and fuel type. The AMSOIL lookup oil grade is SEO84. For normal usage, the manufacturer recommends 10W-30, while 5W-40 is recommended for severe operations. If you are using biodiesel blends (up to B20), it is recommended to use 5W-40 or 15W-40 oil.<\/p>\n

AMSOIL product recommendations<\/h2>\n

To simplify your maintenance, AMSOIL provides high-performance lubrication and filtration options specifically suited for the Ford Power Stroke diesel engine. Below are the recommended products based on your vehicle’s requirements.<\/p>\n

Engine Oil Recommendations<\/h3>\n
\n\n\n\n\n\n\n\n\n
Product Name<\/th>\nViscosity<\/th>\nPart Number<\/th>\n<\/tr>\n<\/thead>\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<\/tbody>\n<\/table>\n<\/div>\n

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

Air Filter Recommendation<\/h3>\n
\n\n\n\n\n\n
Product Name<\/th>\nPart Number<\/th>\n<\/tr>\n<\/thead>\n
WIX Air Filter<\/td>\nWA10679-EA<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Engine Oil Viscosity Guide<\/h3>\n
\n\n\n\n\n\n\n\n\n
Viscosity<\/th>\nTemperature Range \/ Usage Note<\/th>\n<\/tr>\n<\/thead>\n
0W-30, 0W-40<\/td>\nAll Temperatures<\/td>\n<\/tr>\n
10W-30<\/td>\nAbove -18\u00b0C (Normal usage)<\/td>\n<\/tr>\n
15W-40<\/td>\nAbove -7\u00b0C<\/td>\n<\/tr>\n
5W-40<\/td>\nAbove -29\u00b0C (Severe operations)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Note: If biodiesel fuel blends (B20 max) are used, the use of 5W-40 or 15W-40 oil is recommended.<\/em><\/p>\n

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

For a complete service on the 6.7L diesel engine, you will need 13 quarts<\/strong> of oil when replacing the filter. It is essential to check the oil level after refilling to ensure accuracy. Additionally, when performing an oil change, ensure the oil drain plug is tightened to 19 ft\/lbs<\/strong>.<\/p>\n

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

Maintaining a Power Stroke diesel requires attention to detail to manage high-stress environments. Key areas of focus include fuel system integrity, turbocharger health, and managing emissions systems common in modern diesels. Because these engines are designed for heavy-duty hauling, following precise service intervals is critical for long-term reliability.<\/p>\n

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

Diesel engines face unique challenges such as soot loading and extreme temperature fluctuations. The following table outlines how specific AMSOIL products can support your maintenance needs.<\/p>\n

\n\n\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<\/thead>\n
Engine Wear<\/td>\nHigh pressure in diesel engines can cause component scuffing.<\/td>\nSignature Series Diesel Oil<\/td>\nDelivers up to 6X more wear protection based on Detroit Diesel DD13 testing.<\/td>\nRequires proper service intervals.<\/td>\n<\/tr>\n
Contaminants<\/td>\nSmall particles can cause abrasive wear.<\/td>\nAMSOIL Oil Filter<\/td>\nProvides 99% filtering efficiency at 20 microns.<\/td>\nDoes not replace regular filter changes.<\/td>\n<\/tr>\n
Extreme Temperatures<\/td>\nViscosity changes can affect lubrication during starts or heavy loads.<\/td>\nSignature Series Diesel Oil<\/td>\nExcels in extreme temperatures and maintains proper viscosity.<\/td>\nMust match manufacturer viscosity recommendations.<\/td>\n<\/tr>\n
Fuel Dilution\/Biodiesel<\/td>\nB20 blends may require different oil viscosities.<\/td>\n5W-40 or 15W-40 Heavy-Duty Oils<\/td>\nSupports the use of biodiesel fuel blends (up to B20).<\/td>\nVerify specific blend requirements in owner’s manual.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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

Owners of the 6.7L Power Stroke should regularly monitor several key systems:<\/p>\n