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

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.
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.
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.
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.
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.
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.
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.
Helmsey
Explorer
Jul 15, 2016
Another Rotella T6 fan here.
I get mine wherever its on sale :)
geneeich
Explorer
Jul 15, 2016
Thanks everyone, looks like Rotella T6, 5W-40 is the way to go.
Traver8
Explorer
Jul 15, 2016
I don't have a newer engine, mine is a 7.3 but I would like to second the comment from Hank85713 about the oil analysis. I have been doing that and based on the analysis results have extended my change interval to 10K miles with no issues. Also would concur with Tiger02 and say only Motorcraft filters.