2001 Ford F350 7.3l 5000 miles Rotella T 15w40

[tallpaul68]

I bought this truck used with about 200k on it and this is the first analysis I've done. I ran the oil for 5k and have now switch to a John Deere 0w40 synthetic, but may try a w30 in the future based on the info I've read here.
I haven't done much oil analysis, so I'm not sure about most of the numbers, but nothing is worrying me.

Silicon 4.6
Potassium 2.0
Sodium 3.1
Fuel (%) Glycol ---
Water (%) Soot (%) 0.4
Sulfation 58
Nitration 67
Boron 34
Barium 0.0
Calcium 2167
Magnesium 12
Molybdenum 5.3
Sodium 3.1
Phosphorus 1076
Sulfur 3003
Zinc 1145
Visc@40°C ---
Visc@100°C 13.78
VI ---
Oxidation 60
TAN ---
TBN 11.14
PQ ---
Iron 12
Nickel 1.1
Chromium 2.2
Titanium 0.0
Copper 4.3
Aluminum 3.0
Tin 0.0
Lead 4.5

 

[Brons2]

Great results. You could run the oil longer if you wanted. If the TBN is really 11.14 you could run it A LOT longer, but I don't think the TBN is really that high.

 

[JGW]

Nice run, though I doubt the TBN is the correct value.

 

[chubbs1]

My goodness what an excellent engine! Oil looks somewhat oxidized and nitration is on the high side but you could easily run 7.5-9k intervals.

 

[roadrunner1]

Was there any make-up oil added? This looks like an older CI-4 Plus formulation. If the reported values are correct this is absolutely the best report I have seen with Rotella in a 7.3.

 

[Donald]

The fuel seems high. The TBN is not correct. I am not sure its that high on a VOA for this dino oil.

 

[Rand]

I wouldnt go below a 40wt in that engine.

 

[tallpaul68]

I didn't add any new oil over the 5000 miles, but I would guess it was around a half quart or so down. I just checked the jug and its the triple T CJ-4. I was suspicious of the TBN too, but that's what the report said.
What would cause the higher oxidation and nitration?