Top 7 Best Oil for 7.3 Powerstroke
A diesel engine is a high-compression combustion engine, which needs to operate in the correct environment for optimal performance. An oil’s viscosity governs how well it can withstand this high compression.
The 7.3 PowerStroke engine in heavy duty trucks and commercial vehicles is well known to many truckers and fleets who use it for its reliability and longevity. It has been a favorite among the Ford Motor Company line-up since its introduction, but it can be difficult to maintain with all of the different variations from year to year. The oil weight needs also change depending on what type of driving you do or how often you tow. In this blog post we will review some of the best oils for your 7.3 PowerStroke engine so that you have a reference point when shopping around at your local parts store or online retailer!
Click here to skip to our recommended pick!

- SAE: 15W-40
- API: CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4
- Brand: Shell Rotella
- Value for money: π₯π₯π₯π₯π₯
- Purchase link: Buy your Shell Rotella Synthetic Blend 15W-40 Diesel Engine Oil at Amazon!

- SAE: 15W-40
- Brand: Motorcraft
- Value for money: π₯π₯π₯π₯
- Purchase link: Buy your Motorcraft - Ford Oil at Amazon!

- SAE: 15W-40
- API: CK-4, CJ-4, CI-4, CH-4, CG-4, CF-4, CF, SN
- Brand: Castrol
- Value for money: π₯π₯π₯π₯
- Purchase link: Buy your Castrol GTX Diesel 15W-40 CK-4 Motor Oil at Amazon!

- SAE: 15W-40
- API: CK-4
- Brand: Schaeffer
- Value for money: π₯π₯π₯π₯
- Purchase link: Buy your Schaeffer Manufacturing SynShield Durability Advantage 15W-40 Diesel Engine Oil at Amazon!

- SAE: 15W-40
- API: all API-SN/RC and GF5
- Brand: Valvoline
- Value for money: π₯π₯π₯π₯
- Purchase link: Buy your Valvoline Premium Blue One Solution SAE 15W-40 Diesel Engine Oil at Amazon!

- SAE: 15W-40
- API: CK-4, CI-4 Plus, CJ-4
- Brand: Royal Purple
- Value for money: π₯π₯π₯π₯
- Purchase link: Buy your Royal Purple Duralec Super SAE 15W-40 API High Performance Diesel Motor Oil at Amazon!

- SAE: 15W-40
- API: API-Licensed
- Brand: Mobil
- Value for money: π₯π₯π₯π₯
- Purchase link: Buy your Mobil Delvac MX 15W-40, Diesel at Amazon!
Our Overall #1 Rated Pick

Shell Rotella Synthetic Blend 15W-40 Diesel Engine Oil
Key Features
- Protects against wear, deposits, and oil breakdown
- 15W-40 formula
- Ideal for on-highway fleets, construction and diesel pickup trucks
- Improves low-temperature flow
- Improved oxidation performance for increased resistance to oil breakdown
If you want the best protection for your equipment and engine, Shell Rotella T5 15W-40 Synthetic Blend heavy duty diesel oil with Triple Protection Plus technology is exactly what you need. This unique combination provides excellent wear prevention as well as maintaining viscosity control under high temperatures; it also delivers all of those benefits weβve come to expect from regular old βShell” style oils but then some more!
Shell Rotella T5 15W-40 Synthetic Blend is a high quality, long lasting oil that provides excellent wear protection and exceptional deposit control. It also keeps your engine clean by removing harmful deposits before they have time to damage anything.
With its durable system of emissions controls in particulate filters & aftertreatment systems for diesel vehicles on every hardworking need.
Oil For 7.3 Powerstroke Recommended by Manufacturer
Oil weights are measured in terms of viscosity or thickness. The lower the weight number, the thinner the oil. Thinner oils flow more easily at low temperatures and are less likely to cause wear on engine parts. However, they donβt provide as much protection against wear and tear as thicker oils.
SPECIFICATION
Follow Fordβs specifications when it comes to picking an oil brand. Nearly any will do as long as theyβre the correct weight; however for Ford Motor Company wants its customers use only their own branded product β Motorcraft.
VISCOSITY GRADE
Ford recommends a 15W-40 multigrade oil as the best default oil for 7.3 engines. Many Ford dealerships only use this oil for 7.3 Powerstroke Diesel Engine.
CAPACITY
Ford F-150 needs 8 quarts of oil, F-250 7.3 has the capacity of 15 quarts and Ford-350 needs 15 quarts.
Oil For 7.3 Powerstroke by Mileage
As a diesel truck owner, you know that your 7.3 Powerstroke engine needs the best oil to run smoothly and last long. But with so many oils on the market, which one should you choose?
The answer depends on how much mileage you put on your truck each year. Here is a guide to help you choose the best oil for your 7.3 Powerstroke:
If you drive less than 10,000 miles per year, any quality 15W-40 diesel oil will work well in your truck. However, if you drive more than 10,000 miles per year, we recommend using a heavier-duty oil, such as a 40W or 50W.
Best Oil For 7.3 Powerstroke
The top best product [hide]
Shell Rotella Synthetic Blend 15W-40 Diesel Engine Oil

Motorcraft - Ford Oil

Castrol GTX Diesel 15W-40 CK-4 Motor Oil

Schaeffer Manufacturing SynShield Durability Advantage 15W-40 Diesel Engine Oil

Valvoline Premium Blue One Solution SAE 15W-40 Diesel Engine Oil

Royal Purple Duralec Super SAE 15W-40 API High Performance Diesel Motor Oil

Mobil Delvac MX 15W-40, Diesel

Oil For 7.3 Powerstroke β Buyerβs Guide
The Ford 7.3L Powerstroke is a diesel engine that was produced from 1994 to 2003. When it comes to choosing the right oil for your 7.3L Powerstroke, there are a few things you need to take into account.
The first consideration is the type of oil. The most common types of oil are mineral, synthetic, and blends. Mineral oil is made from refined crude oil, while synthetic oil is made from chemicals. Blends are a combination of the two.
Synthetic oils tend to be more expensive than mineral oils, but they offer several benefits. They have a higher viscosity index, which means they flow better in cold weather.
HOW MUCH DOES 7.3 Powerstroke TAKE?
Depending on the model, Ford F-150 needs 8 quarts of oil, F-250 7.3 has the capacity of 15 quarts and Ford-350 needs 15 quarts.
SERVICE INTERVALS
The 7.3L Powerstroke is a tough engine that can withstand some serious mileage without faltering in its performance or lifespan; however, as with any vehicle it pays off to have proper maintenance done on time! Change your oil and filter every 5k miles for best results.
HOW TO CHANGE OIL IN 7.3 Powerstroke
There are a few simple steps to follow in order to change the oil in a 7.3 Powerstroke diesel engine.
- Park the truck on a level surface and set the parking brake.
- Place an oil pan or bucket under the engine to catch the old oil.
- Remove the drain plug from the bottom of the engine and allow the old oil to drain into the pan or bucket.
- Reinstall the drain plug and tighten it by hand. Do not use tools, as you may damage the plug.
- Locate the oil filter and remove it by unscrewing it counter-clockwise. Be careful not to spill any of the old oil inside the engine.
- Install the new oil filter by screwing it clockwise until it is tight.
- Pour the new oil into the engine through the fill hole. Fill to the “full” mark on the dipstick.
- Start the engine and check for leaks. Allow the engine to run for a few minutes, then check the dipstick again to make sure that the oil level is correct.
- Shut off the engine and remove the cap from the oil fill hole.Allow any excess oil to drain back into the container before replacing the cap.
That’s all there is to it! Changing the oil in a 7.3 Powerstroke diesel engine is a relatively
Tips
- Replace oil drain plug and make sure youβve tighten it securely
- Replace only with the new filter
- Always clean everything around after youβve done the step
- Apply a thin layer of clean engine oil to the gasket of the new filter
- Install new filter and torque to specifications
- Pour in recommended amount of engine oil
- Start engine and check for leaks
- Repeat steps as necessary at scheduled intervals