dnewton3
Staff member
Originally Posted By: Slowrider5
I decided to come back and update this post with my final recorded result. I ended up extending the interval up to 13K after doing some more UOA's. The final one I did suggested I could easily go to 15K. So I did it before trading it in just over 300K miles. Had trouble getting any buyer interest in selling a truck with that many miles despite being one-owner and meticulously maintained. It was a badge of honor but not sure I will do that again if I can get better resale value at 150-200K miles.
Code:
Code:
OIL m15w30
MILES IN USE 6k 13k
MILES 230k 286k
SAMPLE TAKEN 7/1/2013 2/2/2016
ALUMINUM 3 3
CHROMIUM 1 1
IRON 12 13
COPPER 4 6
LEAD 7 12
TIN 0 3
MOLYBDENUM 67 75
NICKEL 1 2
MANGANESE 0 1
SILVER 0 0
TITANIUM 0 0
POTASSIUM 1 3
BORON 44 30
SILICON 12 15
SODIUM 4 5
CALCIUM 1010 997
MAGNESIUM 669 716
PHOSPHORUS 789 906
ZINC 880 1039
BARIUM 0 0
INSOLUBLES 0.2 0.3
WATER 0 0
FLASHPOINT ºF 410 385
SUS VIS 210ºF 60.5 60.3
cSt @ 212ºF 10.37 10.29
Blackstone comments:
We logged this sample in as the high-mileage formula and the oil's physical properties look great. The additives aren't much different from what we found last time, although there is more zinc here than the last two reports. That's just an additive in the oil, and having more or less isn't an issue. We're really happy to see less lead in the oil. It's still elevated, but it's not high enough to show a bearing problem. The TBN was strong at 3.2, so there's lots of active additive remaining for a longer run. 15K miles would be okay, but this interval works too.
So you doubled your OCI, and the wear rates were at or lower than the shorter OCI, as several of us predicted, and well within statistical normalcy.
Congratulations!
Also - your comments about selling it are spot on. When high-mileage units are for sale, the purchaser really could not care less about what oil you used, how often you changed it, etc. Frankly, high-mile units are not easily sold, and simply don't command a high dollar because of the potential for catastrophic failure regardless of previous care! Just because you used Mobil 1 lube, does not mean the crank won't snap, or the camshaft retainer bolts will not back out, or .... whatever. It's very common for people to say "I use a synthetic lube because I'll get more money back when I sell may car some day". Bovine Manure! Buyers of high-mile typically could not care less what brand/grade lube was used. If the car got regular service, that's what they expected. If not, they might DETRACT money from the paid price, but they will never ADD money to a price paid, just because the previous owner had a love affair with Brand X Super-Duper syn lube. When you sell a high-mile unit, it will take a long time, and you'll get a very low price, regardless of how well you loved on that ride all those years.
I decided to come back and update this post with my final recorded result. I ended up extending the interval up to 13K after doing some more UOA's. The final one I did suggested I could easily go to 15K. So I did it before trading it in just over 300K miles. Had trouble getting any buyer interest in selling a truck with that many miles despite being one-owner and meticulously maintained. It was a badge of honor but not sure I will do that again if I can get better resale value at 150-200K miles.
Code:
Code:
OIL m15w30
MILES IN USE 6k 13k
MILES 230k 286k
SAMPLE TAKEN 7/1/2013 2/2/2016
ALUMINUM 3 3
CHROMIUM 1 1
IRON 12 13
COPPER 4 6
LEAD 7 12
TIN 0 3
MOLYBDENUM 67 75
NICKEL 1 2
MANGANESE 0 1
SILVER 0 0
TITANIUM 0 0
POTASSIUM 1 3
BORON 44 30
SILICON 12 15
SODIUM 4 5
CALCIUM 1010 997
MAGNESIUM 669 716
PHOSPHORUS 789 906
ZINC 880 1039
BARIUM 0 0
INSOLUBLES 0.2 0.3
WATER 0 0
FLASHPOINT ºF 410 385
SUS VIS 210ºF 60.5 60.3
cSt @ 212ºF 10.37 10.29
Blackstone comments:
We logged this sample in as the high-mileage formula and the oil's physical properties look great. The additives aren't much different from what we found last time, although there is more zinc here than the last two reports. That's just an additive in the oil, and having more or less isn't an issue. We're really happy to see less lead in the oil. It's still elevated, but it's not high enough to show a bearing problem. The TBN was strong at 3.2, so there's lots of active additive remaining for a longer run. 15K miles would be okay, but this interval works too.
So you doubled your OCI, and the wear rates were at or lower than the shorter OCI, as several of us predicted, and well within statistical normalcy.
Congratulations!
Also - your comments about selling it are spot on. When high-mileage units are for sale, the purchaser really could not care less about what oil you used, how often you changed it, etc. Frankly, high-mile units are not easily sold, and simply don't command a high dollar because of the potential for catastrophic failure regardless of previous care! Just because you used Mobil 1 lube, does not mean the crank won't snap, or the camshaft retainer bolts will not back out, or .... whatever. It's very common for people to say "I use a synthetic lube because I'll get more money back when I sell may car some day". Bovine Manure! Buyers of high-mile typically could not care less what brand/grade lube was used. If the car got regular service, that's what they expected. If not, they might DETRACT money from the paid price, but they will never ADD money to a price paid, just because the previous owner had a love affair with Brand X Super-Duper syn lube. When you sell a high-mile unit, it will take a long time, and you'll get a very low price, regardless of how well you loved on that ride all those years.
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