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2014 F250 6.7L PSD, 13.5K miles on Amsoil DEO 5w-40. #5199252 08/28/19 07:03 PM
Joined: Feb 2016
Posts: 484
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claluja Offline OP
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Posts: 484
2014 F250 6.7L PSD, 13.5K miles on Amsoil DEO Signature Series Max Duty 5w-40. 175K on engine. Donaldson filter this time.

Sample #s 4, 5 & 6: Amsoil DEO SS 5w-40
Sample #s 2 & 3: Red Line 15w-40

Deleted 1K into #4.

Interesting how iron tracks silicon.

Switched it up and put Amsoil Diesel & Marine AME CI-4+ 15w40 in this time. And changed air filters. Will see how that goes.

[Linked Image]

Last edited by claluja; 08/28/19 07:17 PM.

2014 F250 6.7L PSD
2006 Sequoia 4.7L
2005 E500 5.0L
2018 Jeep Rubicon, Pentastar 3.6L
Re: 2014 F250 6.7L PSD, 13.5K miles on Amsoil DEO 5w-40. [Re: claluja] #5199487 08/29/19 04:07 AM
Joined: May 2007
Posts: 8,300
dnewton3 Offline
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Historically around 2ppm Fe / 1k miles; very good wear rate. All other metals very low as well.
Most interesting is how the fuel dilution has dropped to such low levels; obviously the delete greatly alters the fuel residual. Although wear was not tracking with fuel per say.
Overall there's good reason to expect a long life from your engine!


The act of preventative maintenance, in and of itself, is FAR MORE important than brand/grade/base choices among lubes and filters.
- under maintaining something is akin to abuse/neglect; that can kill equipment by shortening the lifespan
- over maintaining something has never been proven to be anything but a waste of time and money
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