2017 F250 ~13.6k miles Kirkland 15w40
- Thread starter BeerCan
- Start date
Is that mileage on the oil right? 13.6 miles? Or is that supposed to be 13.6k miles?
dnewton3
Staff member
Looks good. Just a hair under 3ppm/1k of Fe with lots of towing is decent. Contamination low and fuel not bad.
Keep on motoring!
note: I fixed the thread title to read correct miles
Keep on motoring!
note: I fixed the thread title to read correct miles
Winter vs summer? probably more fuel dilution
Probably don't have the latest flash, my truck has not been to the dealer in awhile.
Towing miles about the same, only difference is this truck saw a lot more below freezing starts as it no longer resides in FL
dnewton3
Staff member
Looking at his UOAs in series ...
Vis ..... Fe ppm/1k
13.4 ...... 2.5
13.9 .......2.9
13.6 .......1.8
14.0 .......1.9
12.7 .......2.7
This vis in this UOA was much lower than the first two, and yet was right in line with those first two wear rates. The highest vis didn't have the lowest wear rate; though very close. Also, the highest wear rate sample came with the second highest vis value. If vis was proportional to wear, we'd see easily predicated values. But the reality is that we can't predict wear on vis because there is no correlation here whatsoever. And without correlation, you cannot have causation. Simply put, VIS IS NOT AFFECTING WEAR RATES!
My point? Vis isn't shown to matter at these durations. Wear rates will always move up and down a little; normal variation of life. Don't focus to much on the inputs; vis, FP, TBN/TAN, fuel dilution, etc. Those are interesting only in the fact that they are talking points heading to nowhere. The WEAR RATES are what matters, and they are perfectly "normal" in this UOA series.
Vis ..... Fe ppm/1k
13.4 ...... 2.5
13.9 .......2.9
13.6 .......1.8
14.0 .......1.9
12.7 .......2.7
This vis in this UOA was much lower than the first two, and yet was right in line with those first two wear rates. The highest vis didn't have the lowest wear rate; though very close. Also, the highest wear rate sample came with the second highest vis value. If vis was proportional to wear, we'd see easily predicated values. But the reality is that we can't predict wear on vis because there is no correlation here whatsoever. And without correlation, you cannot have causation. Simply put, VIS IS NOT AFFECTING WEAR RATES!
My point? Vis isn't shown to matter at these durations. Wear rates will always move up and down a little; normal variation of life. Don't focus to much on the inputs; vis, FP, TBN/TAN, fuel dilution, etc. Those are interesting only in the fact that they are talking points heading to nowhere. The WEAR RATES are what matters, and they are perfectly "normal" in this UOA series.
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Great point, Sir!
I think this next change will be close to 15kTypical hard working F250.
@BeerCan — you planning to increase the OCI further towards 15k miles or what? We need an interesting UOA for a change.
I plan on changing in the next 2 weeks and right now I am at 13.8k so I might get there 
