Diesel Oil Recommendation
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I mention 15w40 products in this thread but you can use 10w30, 5w-40, or 15w40 that meets Ford F1 Specification. Recommend higher grade than 10w30 if towing heavy though. Nice truck!
Here's an AI overview:
When referring to a "Ford CK-4 6.7 Powerstroke," it means a Ford 6.7L Powerstroke diesel engine in a Super Duty truck that requires an oil meeting the API CK-4 standard, which is the recommended oil type for modern diesel engines, but Ford specifically advises against using standard CK-4 oils in their 6.7 Powerstroke engines and instead recommends their own formulated oil meeting the WSS-M2C171-F1 specification for optimal protection and performance; essentially, while CK-4 is technically suitable, Ford prefers their own blend for their diesel engines.
When referring to a "Ford CK-4 6.7 Powerstroke," it means a Ford 6.7L Powerstroke diesel engine in a Super Duty truck that requires an oil meeting the API CK-4 standard, which is the recommended oil type for modern diesel engines, but Ford specifically advises against using standard CK-4 oils in their 6.7 Powerstroke engines and instead recommends their own formulated oil meeting the WSS-M2C171-F1 specification for optimal protection and performance; essentially, while CK-4 is technically suitable, Ford prefers their own blend for their diesel engines.
Great info, thank you sir!I mention 15w40 products in this thread but you can use 10w30, 5w-40, or 15w40 that meets Ford F1 Specification. Recommend higher grade than 10w30 if towing heavy though. Nice truck!
So what is the Ford preferred oil and weight for this?
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From the HotShot's Secret website:
Use motor oil meeting Ford Specification WSS-M2C171-F1. The manufacturer recommends 10w30 for normal usage and 5W-40 for severe operations. If biodiesel fuel (B20 max) is used the use of 5W-40 or 15w40 oil is recommended.
Any Xw40 HDEO off the shelf that meets Ford’s spec given your climate you’ll be driving in and is changed regularly will work fine.
I used some of the mentioned oils in this thread but ended up settling on Amsoil 15w40 Signature Series.
It runs way quieter and smoother in my 160k mi swapped Duramax - probably because it's higher viscosity and beefy add pack compared to the others.
It runs way quieter and smoother in my 160k mi swapped Duramax - probably because it's higher viscosity and beefy add pack compared to the others.
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I used T6 15w40 recently in our 5.9
I would use 5w40 full syn. There was speculation by some engine (re)builders that 15w40 contributed to spun bearings in the earlier scorpion motors with tighter crank journal clearances.
The Delo 5w-40 doesn't meet F1, so I'd be looking hard at T6 or Delvac Extreme.
The Delo 5w-40 doesn't meet F1, so I'd be looking hard at T6 or Delvac Extreme.
Motorcraft 10w30 SD
If you can run a 15-40 oil in your particular climate, I strongly recommend the Mobil Delvac Extreme. I ran it in an 18’ Ram CTD and if I could run it in the 22’ I have now, I would not hesitate to use it. Truck just seemed smoother and quieter on the Extreme than any other 15-40 I tried in it.
Let me correct myself. ESP.
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