Delo 400
Lead Driver
Joined: Dec 2006
Posts: 7,092
Likes: 145
From: San Diego, CA
For the latest list of "approved" oils you can go here: https://www.fcsdchemicalsandlubrican...ry=Motor%20Oil
For the 7.3L you are looking for the CJ-4 rating if it's not on the approved list.
For the 7.3L you are looking for the CJ-4 rating if it's not on the approved list.
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FTE-Spread The Knowledge
Joined: Feb 2008
Posts: 2,285
Likes: 240
Thanks, Delo still isn’t on it. Was using Valvoline but can’t find it, and I don’t even see it on the list anymore. It was on there. Went with Rotella T4. Almost went with Castro, but was not sure if it was on the list. It is........!
Lead Driver
Joined: Dec 2006
Posts: 7,092
Likes: 145
From: San Diego, CA
I was a die hard Mobil Delvac guy. They switched over to CK-4 and I ran out of my stockpile of CJ-4 shortly before I was force retired from the active 7.3L world.
I have read of people going with Triax, Rotella, and good ol' Supertech (Wal-Mart) with good results.
I have read of people going with Triax, Rotella, and good ol' Supertech (Wal-Mart) with good results.
Tuned
Joined: Apr 2009
Posts: 394
Likes: 1
From: DFW
I always use oil that exceeds specs. Take a look at Lubrication Engineers 8700. After it cleaned the rings out the truck stopped
using oil between changes and the engine runs so much more quiet. They ship to your door, I am close so I get it next day on the porch.
using oil between changes and the engine runs so much more quiet. They ship to your door, I am close so I get it next day on the porch.
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