6.7L Power Stroke Oil Change Guide

6.7L Power Stroke Oil Requirements, Recommendations, & Oil Change Procedures

Applicable Models:

2011 - current Ford F-250, F-350, F-450, F-550 Super Duty

Applicable Engine(s):

6.7L Power Stroke diesel

Engine Oil Capacity:

13.0 quarts with filter change

Engine Oil Viscosity Spec:

See full viscosity chart below for options and requirements

Oil Change Intervals:

Change engine oil and oil filter when prompted by the oil life monitor system; do not exceed 10,000 miles between oil change intervals

6.7L Power Stroke Oil Change Parts List


Part Number(s)


Engine oil filter

Motorcraft FL2051S


Engine oil pan drain plug

Ford F75Z-6730-BA


Engine oil fill cap

Motorcraft EC786


Engine oil level indicator (dipstick)

Ford BC3Z-6750-C


[1] Ford/Motorcraft lube oil filter is highly recommended, features silicone anti-drainback valve.
[2] Reusable; examine threads and o-ring seal, replace as necessary.
[3] Reusable; examine condition of o-ring seal and replace as necessary, or replace if top of cap begins to deteriorate.
[4] Replace if dipstick is kinked, does not enter/exit dipstick tube smoothly, or if becomes damaged.

Motor Oil Requirements & Recommendations

The engine oil requirements for the 6.7L Power Stroke are somewhat confusing, so let's begin with a brief history lesson. When the 6.7L Power Stroke was introduced for the 2011 model year, Ford required an API CJ-4 engine oil. This is a low ash formulation with performance characteristics that, amongst other things, provide protections against DPF clogging and minimizes deposits in EGR coolers and valves. In 2016, the American Petroleum Institute introduced the API CK-4 specification, which is assumed to exceed the performance characteristics of the CJ-4 spec. In testing CK-4 oil formulations, however, Ford Motor Company found that they did not always meet Ford's wear protection criteria and CJ-4 formulations were superior in this category (you can view the memo from Ford here).

For the 2011 model year, Ford required an engine oil that met WSS-M2C171-D specifications, but this spec is used synonymously with API CJ-4 in the owners manual. For 2012 to 2016 model years, Ford required an engine oil that met WSS-M2C171-E specifications, but this spec is used synonymously with API CJ-4 in the owners manual. For the 2017 - current model year, Ford has required an engine oil that meets WSS-M2C171-F1 specification; again, this spec is used synonymously with API CJ-4 in the owners manual.

The takeaway here is that Ford WSS-M2C171-F1 spec engine oils meet CK-4 standards, but CK-4 standards do not necessarily meet the Ford WSS specification. In summary, all 6.7L Power Stroke diesel owners should be using a motor oil that meets the Ford WSS-M2C171-F1 specification, which supersedes the previous Ford specs and will ensure maximum engine wear protection in addition to exhaust aftertreatment system compatibility. We highly recommend Amsoil Max Duty Signature series 5W-40 for all applications within its temperature range; it meets Ford specifications and provides additional protections against fuel dilution and engine wear while providing superior cold flow characteristics.

6.7L Power Stroke Engine Oil Viscosity Chart

Ambient Temperature Range

Viscosity & Spec


Expected ambient temp > 0° F

SAE 10W-30 API CJ-4 meeting WSS-M2C171-F1 specifications

Viscosity grade for normal driving and usage

Expected ambient temp > -20° F

SAE 5W-40 API CJ-4 meeting WSS-M2C171-F1 specifications

Viscosity grade required for vehicles falling under the "severe" duty category and vehicles using biodiesel blends

Expected ambient temp > 20° F

SAE 15W-40 API CJ-4 meeting WSS-M2C171-F1 specifications

Acceptable viscosity for vehicles using biodiesel blends; not a substitute for 5W-40 under "severe" duty service conditions

All ambient temps

SAE 0W-30/0W-40 API CJ-4 meeting WSS-M2C171-F1 specifications

Viscosity grades required for operation in ambient temperatures less than -20° F; not advised in warmer temperatures.

A vehicle that meets any of the following criteria is categorized under the "severe duty" service category:

• Engine is idled more than 10 minutes within a 60 minute drive period, is operated at low speeds (under 25 mph) for extended periods of time, or is frequently operated stationary.

• Vehicle makes short trips with frequent stops and/or engine is frequently operated in a manner that prevents it from reaching full operating temperature.

• Vehicle is driven off-road or in dusty conditions.

• Vehicle is driven/operated in temperatures below -9° F or above 100° F.

• Vehicle performs light to medium towing exceeding 1,000 miles between normal oil change intervals.

• Vehicles performs heavy trailer towing.

• Vehicle hauls cargo at or near it's maximum payload capacity for extended periods of time.

• Engine is run on fuels other than ULSD, including all biodiesel blends.

Most Super Duty pickup trucks will fall under the severe duty service category; recommend 5W-40 full synthetic engine oil so long as vehicle is operated in ambient temperatures greater than -20° F.

6.7L Power Stroke Engine Oil Recommendations

Diesel Hub recommends the following Amsoil products for Super Duty trucks equipped with the 6.7L Power Stroke V-8:

Amsoil synthetic engine oils offer:

• Superior protection against fuel dilution and oil consumption

• Superior resilience against thermal, mechanical, and chemical breakdown of engine oil

• Improved oil flow and engine protection in sub-zero temperatures and during cold starts

• All listed products meet Ford engineering specification WSS-M2C171-F1

Amsoil is a leading manufacturer of synthetic oils and lubricants, including a line of engine oils engineered to meet the stringent demands specific to diesel engines.

6.7L Power Stroke Ticking After Oil Change

It is not uncommon for a 6.7L Power Stroke to produce a typewriter-like ticking noise following an oil change. Ford technical service bulletin (TSB) 10-19-2 addresses this concern and assures that it is completely normal. In fact, it is not uncommon for this sound to come-and-go under various conditions. There's no reason to be alarmed if your engine begins producing this noise, even for extended periods of time. The TSB can be viewed here: Ford TSB 10-19-2

6.7L Power Stroke Oil Change Procedures

Click any thumbnail to view fullsize, detailed image

oil pan and oil filter

• Locate the engine oil drain plug and filter. The drain plug is located near the bottom of the engine oil pan and points towards the rear of the vehicle. The lube oil filter is located near the passenger side of the engine oil pan.

engine oil draining through drain plug hole

• Place a suitable container (minimum 13 quarts capacity) beneath the engine oil pan to collect the used oil as it is drained.

• Remove the drain plug (16 mm socket or box end wrench) from the engine oil pan and allow the engine oil to drain.

Note that 2011 model year engines had a plastic lower oil pan and a 1/4 turn style drain plug, differing from that pictured.

dipstick and oil fill cap location

• Locate the engine oil fill cap on top of the engine towards the driver side near the dipstick and dipstick tube.

• Loosen the engine oil fill cap to allow the oil to drain from the oil pan freely (the cap does not need to be removed, just loosened to allow the crankcase to vent).

oil filter removal

• Remove the engine oil filter by rotating it counterclockwise. An oil filter wrench can be used as necessary.

oil filter adapter base

• Verify that the engine oil filter gasket did not stick to the oil filter adapter base. Note that in the filter adapter pictured, the gasket has separated from the filter and stuck to the base of the adapter; it is imperative that this is removed before attempting to install the new oil filter.

• Clean the engine oil filter adapter base/flange with a clean, lint free cloth.

inspecting engine oil pan drain plug

• Carefully examine the condition of the engine oil drain plug, ensuring that the threads are not damaged and that the o-ring seal is in good condition. If the seal appears flattened or has a rip, tear, etc, replace the drain plug.

• Clean the drain plug with a lint free cloth. Do not clean the drain plug with a chemical or solvent (i.e. brake cleaner) as it may compromise the o-ring seal.

• Reinstall the drain plug in the engine oil pan; torque to 19 lb-ft. Clean the area around the drain plug so leaks can be easily detected.

pre-filling engine oil filter and lubricating filter gasket

• Pre-fill the new oil filter and lubricate the gasket with clean engine oil. Pre-filling the filter prevents an entirely dry start, which over time will cause undesirable wear. Do not overfill the filter as it will spill during installation (approximately 3/4 of a quart of oil is sufficient and allows the filter to be maneuvered without spilling).

new oil filter installed

• Install the new oil filter snug to the oil filter adapter base. Clean any new or used engine oil that may have spilled so that leaks can be easily detected.

filling engine with new oil

• Add 13 quarts (minus what was added to the engine oil filter) of new motor oil through the oil fill using a clean funnel. When selecting oil, be mindful of the compatible ambient temperature ranges listed in the oil viscosity chart above.

• Reinstall the engine oil fill cap once the crankcase has been refilled.

• Check for oil leaks at the oil drain plug now that that crankcase has been filled.

verifying engine oil level on dipstick

• Remove the engine oil level indicator (dipstick) from its tube, wipe it clean with a lint free cloth, then reinsert completely and remove again. Verify that the engine oil level is correct.

resetting engine oil life monitor

• Start the engine and check for leaks at the oil drain plug and around the base of the oil filter.

• Reset the engine oil life monitor through the instrument panel display by first scrolling to "Truck Info", then "Maintenance Monitor", and finally "Oil Life" using the buttons on the steering wheel. Hold the "OK" button on the steering wheel to reset to 100%.

engine oil sample collected

• Every oil change is an opportunity to collect a sample for oil analysis. Oil analyses detect and report important information such as the concentration of wear metals in the engine oil, total fuel dilution, and detect contaminants such as engine coolant.

• We highly recommend the oil analysis services provided through Oil Analyzers Inc for prompt service and comprehensive reporting.

6.7L Power Stroke engine oil analysis results

• Our oil analysis results indicated moderate levels of wear metals in the engine oil. Since this is the vehicle's first oil change, this is to be expected due to engine break-in. Fuel dilution was approaching 5%, which is moderately high. The oil will be re-sampled at the next oil change to determine whether or not this is also due to engine break-in, or if it will be considered a normal baseline for future samples. Although the oil life monitor suggested the oil had 30% life left, the fuel dilution rate tells us that the oil should be changed regularly at 6,000 mile intervals for this vehicle.