Changed it back in June '11 with Rotella T6 5W-40 and put on a new Mobil 1 oil filter.
The previous fill was the exact same thing, also for 5k miles approx. The fill before that was a short run of PU 5W-30. I skipped UOA's on both of those.
See previous UOA here.
Sixth sample of 09/07/10 was PP 5W30 with a new Amsoil filter.
Fifth sample of 10/17/09 was Rotella T 10W-30 with a new Amsoil Filter.
Fourth sample of 8/20/09 was Rotella T 10W-30 and did not get a new filter, left the Amsoil filter on for 2 runs.
Third sample of 5/15/09 was Rotella T 10W-30 and a new Amsoil filter.
Second sample of 7/28/08 was GC with a UPF-52 filter.
First sample of 9/2/07 was Valvoline 10W-30 most likely with a cheap oil filter from my mechanic after fixing some oil leaks.
Napa Gold or Wix air filters used, changed at 10k mile increments (140k, 150k, etc.)
The Blackstone comments don't completely make sense because I forgot to correct the slip and it already had printed on it Mobil 1 10W-30 so that is what they thought I was running instead of the T6.
Blackstone Coments:
Now that's better. Both lead and silicon dropped nicely in this sample. If you found a leak and fixed it, it seems to have done the trick. Other wear metals look fine, too. Maybe the shorter oil run is to thank; it's hard to say for sure. Interestingly, the viscosity read quite high in this sample (in the 5W/40 or 15W/40 range). It doesn't look to have been caused by heat, so we're not sure what explains that. Still, with wear improving we can't get too excited about it. This is a good sample; hopefully these nice trends continue even if you go back up to 7K miles.
Things look pretty good this time, finally, so I think I'll probably stick to this oil and 5k mile OCI's. I still did plenty of towing this summer as well. We hauled the travel trailer to KY and back plus some more shorter trips so we weren't any easier on it. It seems to like the older 10W-30 Rotella (haven't tried T5 yet) and it really seems to like the T6. It sure didn't like the PP at all. 4 ppm less of Silicon couldn't possibly make that much difference even with the extra miles. Hard to say though. I'm not sure it is worth doing any more UOAs, this might be my last one.
Comments welcome.
Code:
OIL T6 5W-40 PP 5W-30 RT 10W-30 RT 10W-30 RT 10W-30 GC 0W-30 Valv. 10W-30
MILES IN USE 5.0k 7.6k 2.6k 5.0k 5.0k 5.6k 4.6k Uni Avg
MILES 155k 142.6k 132.5k 130k 125k 118k 108k
SAMPLE TAKEN 10/21/11 9/7/10 10/17/09 8/20/09 5/15/09 7/28/08 9/2/07
ALUMINUM 4 7 10 34 7 6 6 4
CHROMIUM 1 1 1 1 1 1 1 1
IRON 14 23 11 22 26 19 22 21
COPPER 2 3 2 4 3 4 5 6
LEAD 13 29 5 15 10 32 19 9
TIN 0 0 0 0 3 0 0 2
MOLYBDENUM 59 42 3 7 8 7 15 65
NICKEL 1 1 1 1 1 1 1 1
MANGANESE 0 0 0 0 0 1 0 1
SILVER 0 0 0 0 0 0 0 0
TITANIUM 0 0 0 0 0 0 0 0
POTASSIUM 6 0 6 5 4 2 1 1
BORON 24 23 19 19 14 5 7 52
SILICON 22 26 17 18 26 29 94 22
SODIUM 6 6 3 9 7 7 8 9
CALCIUM 938 2441 2282 2188 1864 1648 1701 2143
MAGNESIUM 1042 22 20 49 152 526 66 190
PHOSPHORUS 921 642 960 894 876 868 616 716
ZINC 1056 765 1155 1189 1076 1054 737 854
BARIUM 0 0 0 0 0 0 2 0
SUS VIS 210ºF 75.6 63.4 64.4 69.7 65.6 66.2 59.3
cSt @ 212ºF 14.41 11.16 11.45 12.88 11.78 11.95 10.02
FLASHPOINT ºF 395 400 390 400 385 385 390
FUEL %
ANTIFREEZE % 0.0 0.0 0.0 0.0 0 0 0
WATER % 0 0 0 0 0 0 0
INSOLUBLES % 0.3 0.4 0.3 0.3 0.4 0.3 0.3
TBN n/a 2.0 n/a 2.3 2.7 3.6 2.6
The previous fill was the exact same thing, also for 5k miles approx. The fill before that was a short run of PU 5W-30. I skipped UOA's on both of those.
See previous UOA here.
Sixth sample of 09/07/10 was PP 5W30 with a new Amsoil filter.
Fifth sample of 10/17/09 was Rotella T 10W-30 with a new Amsoil Filter.
Fourth sample of 8/20/09 was Rotella T 10W-30 and did not get a new filter, left the Amsoil filter on for 2 runs.
Third sample of 5/15/09 was Rotella T 10W-30 and a new Amsoil filter.
Second sample of 7/28/08 was GC with a UPF-52 filter.
First sample of 9/2/07 was Valvoline 10W-30 most likely with a cheap oil filter from my mechanic after fixing some oil leaks.
Napa Gold or Wix air filters used, changed at 10k mile increments (140k, 150k, etc.)
The Blackstone comments don't completely make sense because I forgot to correct the slip and it already had printed on it Mobil 1 10W-30 so that is what they thought I was running instead of the T6.
Blackstone Coments:
Now that's better. Both lead and silicon dropped nicely in this sample. If you found a leak and fixed it, it seems to have done the trick. Other wear metals look fine, too. Maybe the shorter oil run is to thank; it's hard to say for sure. Interestingly, the viscosity read quite high in this sample (in the 5W/40 or 15W/40 range). It doesn't look to have been caused by heat, so we're not sure what explains that. Still, with wear improving we can't get too excited about it. This is a good sample; hopefully these nice trends continue even if you go back up to 7K miles.
Things look pretty good this time, finally, so I think I'll probably stick to this oil and 5k mile OCI's. I still did plenty of towing this summer as well. We hauled the travel trailer to KY and back plus some more shorter trips so we weren't any easier on it. It seems to like the older 10W-30 Rotella (haven't tried T5 yet) and it really seems to like the T6. It sure didn't like the PP at all. 4 ppm less of Silicon couldn't possibly make that much difference even with the extra miles. Hard to say though. I'm not sure it is worth doing any more UOAs, this might be my last one.
Comments welcome.
Code:
OIL T6 5W-40 PP 5W-30 RT 10W-30 RT 10W-30 RT 10W-30 GC 0W-30 Valv. 10W-30
MILES IN USE 5.0k 7.6k 2.6k 5.0k 5.0k 5.6k 4.6k Uni Avg
MILES 155k 142.6k 132.5k 130k 125k 118k 108k
SAMPLE TAKEN 10/21/11 9/7/10 10/17/09 8/20/09 5/15/09 7/28/08 9/2/07
ALUMINUM 4 7 10 34 7 6 6 4
CHROMIUM 1 1 1 1 1 1 1 1
IRON 14 23 11 22 26 19 22 21
COPPER 2 3 2 4 3 4 5 6
LEAD 13 29 5 15 10 32 19 9
TIN 0 0 0 0 3 0 0 2
MOLYBDENUM 59 42 3 7 8 7 15 65
NICKEL 1 1 1 1 1 1 1 1
MANGANESE 0 0 0 0 0 1 0 1
SILVER 0 0 0 0 0 0 0 0
TITANIUM 0 0 0 0 0 0 0 0
POTASSIUM 6 0 6 5 4 2 1 1
BORON 24 23 19 19 14 5 7 52
SILICON 22 26 17 18 26 29 94 22
SODIUM 6 6 3 9 7 7 8 9
CALCIUM 938 2441 2282 2188 1864 1648 1701 2143
MAGNESIUM 1042 22 20 49 152 526 66 190
PHOSPHORUS 921 642 960 894 876 868 616 716
ZINC 1056 765 1155 1189 1076 1054 737 854
BARIUM 0 0 0 0 0 0 2 0
SUS VIS 210ºF 75.6 63.4 64.4 69.7 65.6 66.2 59.3
cSt @ 212ºF 14.41 11.16 11.45 12.88 11.78 11.95 10.02
FLASHPOINT ºF 395 400 390 400 385 385 390
FUEL %
ANTIFREEZE % 0.0 0.0 0.0 0.0 0 0 0
WATER % 0 0 0 0 0 0 0
INSOLUBLES % 0.3 0.4 0.3 0.3 0.4 0.3 0.3
TBN n/a 2.0 n/a 2.3 2.7 3.6 2.6
