6.0 Powerstroke 5w40 Vs 15w40: Which One to Go With!

What is the difference between the oil from Powerstroke 5w40 and 15w40? The common difference is that 5w40 performs better in comparatively cooler conditions. On the other hand, the 15w40 will be suitable for warmer conditions.

There are also too many circumstances that you need to consider while choosing oil for 6.0 Powerstroke 5w40 vs 15w40. So here, we will try to go through some essential factors like; oil type, temperature tolerance, viscosity, and yes the performance output.

So, without further ado. Let’s jump in!

Debate For 6.0 Powerstroke 5w40 Vs 15w40

ViscosityLess viscosity, thinner oilComparatively higher viscosity in lower temperature
Temperature ToleranceSuitable for the colder regionSuitable for a relatively warmer environment
Best UseGood heat resistance with an aggressive driving styleBest cranking and cold start
Wear & TearMore wear but economic fuel consumptionLess wear with not good at fuel economy
PriceCan be a bit expensive varying brandsReasonable compared with the 5w-40

We hope you start getting comparison facts more clearly here once you have noticed the column. Therefore, we will move to further discussion so that you can get the comparison points even more clearly as we have been discussing finding the best oil for 6.0 Powerstroke.

Note: Here, the number before and after “w” indicates the oil viscosity at a lower and higher temperature.

Viscosity Difference to 5w Vs 15w oil

You should look for the viscosity first when buying oil for your vehicle. There are slight differences between these two oils. For example, with 5w-40, the Kinematic average viscosity is nearly 9.3-12.5mm2/S. On the other hand, you will get 12.5-16.3mm2/S with the 15w-40 oil.

So, when you intend to buy oil for your vehicle, make sure there’s enough thickness in the oil. A more viscous oil increases the performance of the oil. In addition, your vehicle’s engine will run smoothly with a longer velocity weight.

Choosing Oil type From 5w40 & 15w40

The foremost difference here is that the 5w40 fully synthetic oil would be ideal for 6.0 Powerstroke. At the same time, you will find the semi-synthetic type of oil with the 15w40. Therefore, the fully synthetic oil provides your truck’s engine with better performance.

However, for 6.0 Powerstroke engines, fully synthetic can run the engine well. Besides, if you are going for the conventional type, choosing 15 W40 will be ideal.

Temperature Tolerance Of 5w40 and 15w40 Oils

If you ask us the most crucial segment of this discussion, we will talk about this. Therefore, you should keep the temperature circumstances in your mind while buying the oil for your engine or vehicle.

If you have to drive your vehicle in comparatively cooler weather, the 5w-40 will be more suitable for you. Besides, the 15w-40 will be ideal for the warmer winter. Therefore, if you choose the 15w40, you need to change the oil twice. Hence, 15w40 may not be suitable for all temperatures.

Best Use Of Two Oils

If we talk about the usability of these oils, you will be pretty much satisfied. But, you have to choose one at the end of the day. So, let’s make things a bit clear to you.

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The 5w40 oil has the best heat resistance system. You may not find it with the 15w40 oil. The 15w40 will provide more economical fuel consumption. But 5w40 in 6.0 Powerstroke will be more suitable for aggressive driving style.

Therefore, switching from 15w40 to 5w40 won’t be a wrong decision either.

Price Difference Between 5w40 and 15w40

As shown in the column, you have to pay a bit more if you tend to buy the 5w40 oil for the Powerstroke engine. Therefore, you need to spend less money with the 15w4o oil. So. If you are thinking about the budget more than anything else, the 15w40 will be a better choice for you.

The price range can vary depending on brands and the stores.

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Frequently Asked Questions (FAQs)

Is it Okay to Use 5w40 Instead of 15w40?

Yes, using 5w40 instead of 15w40 is fine. You can use the 5w40 if your Ford engine has still not reached 60,000 kilometers. As a result, using 5w40 engine weight oil will lead to faster oil circulation. Plus, if you live in a colder region, you can use the 5w40.

Should I Run 15w40 or 5w40?

It entirely helps reliant on the situation. Going with the 5w40 will be considerably better if you’re looking for an excellent heat-resistant oil. Furthermore, if you drive your vehicle in a cooler area, you should use 5w40 oil. However, you may be concerned about the cost. The 5w40 Powerstroke engine oil is more pricey than the 15w40 Powerstroke engine oil.

What Oil Should You Run in a 6.0 Powerstroke?

You should choose the engine based on the ambient temperature. Both 5w-40 and the 15w-40 will be suitable for the 6.0 Powerstroke engine. But, when it comes to picking one, if you use the 15w-40, you need to change it in the winter as the 5w-40 will be more compatible in this case. Besides, if you have a warmer environment, you should go with the 15w-50 Powerstroke oil.

Which Oil Should You Recommend for Powerstroke Engines?

There are many oils for Powerstroke engines. Shell Rotella T6 Full Synthetic has a viscosity rating of 15w-40. The recommendation is based on the climate, Mobil 1 Turbo Diesel Truck Full Synthetic Motor Oil. Here, you can get the oil viscosity rating of 5w-40. Besides, you must decide to buy based on the facts mentioned above.

How Often Should You Change the Oil in 6.0 Powerstroke?

You should change the oil in your 6.0 Powerstroke in regular intervals. The best thing would be to change the oil in every 7500 miles you drive your vehicle. It’s essential to change the engine. If you don’t do so, it will cause unusual engine problems. The number of miles will come down to 5000 in severe operating conditions.

Final Words

We presented some essential factors regarding 6.0 Powerstroke 5w40 Vs 15w40 oil. Therefore, you will be able to make a proper decision when you tend to choose the best oil for your truck. It will be better if you know your circumstances and choose the best one. 

Both these types of oils will provide you with some significant benefits. If you talk about the 5w40, you will find some advantages and some disadvantages. The same thing will be for the 15w40 oil. However, your money won’t go into vain buying these types of oils.

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D Conroy

Meet our senior writer and content manager of Automasterx. He has worked in several mechanical garages and mastered different vehicle diagnoses and parts repair. He never stops until finding out the ultimate solutions for any vehicle fault code. However, ensuring the only solid solutions for each vehicle malfunction is his core part of the duty, alongside analyzing fault codes and signals.

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