I have a 2015, F-250, 6.7 Diesel and want to know what oil most people are using? Manual says CJ-4, 10W-30 regular use, 5W-40 when towing. I asked dealer at last oil change whether I should change to 5W-40 for 12,000 mile trip west. He said 10W-30 should be fine, but I was not sure he said that because they didn't have the 5W-40 on hand. Also, should I use a syn blend or regular heavy duty diesel oil?What are your thoughts?

I use shell rotella t6 in my 6.0 psd. Most reports I have read all almost recommend the synthetics over dino oil. Yes it will be a little more per oil change but you can extend the interval if ya do oil analysis. I go about 5000 mile per oil change but you have the common rail engine so you can go a little further depending on what the manual recommends.

Seems quite of few of the 6.7 folks are running Rotella T6 5w-40 following break in. Easy to find on sale at Walmart. Make sure to use only Motorcraft filters.

geneeich wrote:I have a 2015, F-250, 6.7 Diesel and want to know what oil most people are using? Manual says CJ-4, 10W-30 regular use, 5W-40 when towing. I asked dealer at last oil change whether I should change to 5W-40 for 12,000 mile trip west. He said 10W-30 should be fine, but I was not sure he said that because they didn't have the 5W-40 on hand. Also, should I use a syn blend or regular heavy duty diesel oil?What are your thoughts?I use 5-40 in mine.

Ran Rotella 15W-40 in my old 6.0 for quite some time then switched over to Rotella T6. Been using that ever since. Very happy w/it. Don't have the 6.0 anymore, but T6 is all I've used in the 6.7. Overboard I know, but I change it every 5,000 miles anyways.

I'm at 96k miles running T6 Rotella. I did run 1 oci using 10w30 delo synblend and my truck actually dropped a little in fuel economy so I switched back to T6.

F-250 6.7 PowerStroke Oil | Good Sam Community

Helmsey
Explorer
Jul 15, 2016
Another Rotella T6 fan here.
I get mine wherever its on sale :)
Travlingman
Explorer II
Jul 15, 2016
Another Rotella T6 5W-40 in mine. Buy mine at Tractor Supply, they usually have a $5 rebate per gallon form there. Take to dealer and let them change using Motorcraft filter.
IdaD
Explorer
Jul 15, 2016
Hank85713 wrote:
I use shell rotella t6 in my 6.0 psd. Most reports I have read all almost recommend the synthetics over dino oil. Yes it will be a little more per oil change but you can extend the interval if ya do oil analysis. I go about 5000 mile per oil change but you have the common rail engine so you can go a little further depending on what the manual recommends.

I have a Cummins rather than a Powerstroke but I use Rotella T6 too. Good stuff. Best price I've found is Amazon subscribe and save for $18/gallon. With the Fleetguard filter a change runs a little over $60, which is a good deal for full synthetic.
FishOnOne
Nomad
Jul 15, 2016
I'm at 96k miles running T6 Rotella. I did run 1 oci using 10w30 delo synblend and my truck actually dropped a little in fuel economy so I switched back to T6.
ACZL
Explorer
Jul 15, 2016
Ran Rotella 15W-40 in my old 6.0 for quite some time then switched over to Rotella T6. Been using that ever since. Very happy w/it. Don't have the 6.0 anymore, but T6 is all I've used in the 6.7. Overboard I know, but I change it every 5,000 miles anyways.
DanNJanice
Explorer
Jul 15, 2016
geneeich wrote:
I have a 2015, F-250, 6.7 Diesel and want to know what oil most people are using? Manual says CJ-4, 10W-30 regular use, 5W-40 when towing. I asked dealer at last oil change whether I should change to 5W-40 for 12,000 mile trip west. He said 10W-30 should be fine, but I was not sure he said that because they didn't have the 5W-40 on hand. Also, should I use a syn blend or regular heavy duty diesel oil?

What are your thoughts?

I use 5-40 in mine.
Tiger02
Explorer
Jul 15, 2016
Seems quite of few of the 6.7 folks are running Rotella T6 5w-40 following break in. Easy to find on sale at Walmart. Make sure to use only Motorcraft filters.
Hank85713
Explorer
Jul 15, 2016
I use shell rotella t6 in my 6.0 psd. Most reports I have read all almost recommend the synthetics over dino oil. Yes it will be a little more per oil change but you can extend the interval if ya do oil analysis. I go about 5000 mile per oil change but you have the common rail engine so you can go a little further depending on what the manual recommends.

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