I still can't find where the silicon is coming from. As mentioned in all previous posts, we do get the occasional MAF code thrown. So far I've gone from K&N, to Wix, and even Amsoil air filters. I've also replaced the air box itself, cleaned the MAF multiple times, and gone through the entire intake tube looking for holes and blowing out/cleaning the inside. Still seeing high silicon and the occasional code for MAF being thrown.
Make/Model: GM 5.3L V-8
Vehicle: 2004 Chevy Tahoe
Code:
OIL Ams ASL Ams ASL Ams ASL Ams ASL Ams ASL Ams ASL
MILES IN USE 9,213 10,045 9,037 9,246 8,124 6,069
MILES ON UNIT 214,977 205,764 195,719 186,682 177,436 175,381
SAMPLE TAKEN 1/2/17 7/15/16 12/14/15 6/29/15 11/30/14 10/23/14
MAKE UP OIL 0 0 0 0 0 0
ALUMINUM 3 4 3 4 3 2
CHROMIUM 1 1 0 0 0 0
IRON 12 15 11 12 9 7
COPPER 13 11 12 10 12 10
LEAD 11 22 13 30 7 6
TIN 0 0 0 5 0 0
MOLYBDENUM 138 130 143 160 144 139
NICKEL 1 1 2 1 0 1
MANGANESE 0 0 1 0 0 0
SILVER 0 0 0 0 0 0
TITANIUM 0 0 0 0 0 0
POTASSIUM 1 2 4 4 0 0
BORON 39 42 36 61 45 53
SILICON 28 30 35 28 31 25
SODIUM 9 11 10 9 9 8
CALCIUM 3191 2928 3570 3461 3247 3475
MAGNESIUM 13 13 17 14 12 15
PHOSPHORUS 648 558 655 627 702 658
ZINC 748 628 773 800 801 767
BARIUM 0 0 0 0 0 0
SUS @ 210F 63.8 68.8 66.0 62.6 64.6 63.8
Visc @ 100C 11.29 12.64 11.88 10.94 11.51 11.29
Flashpoint 445 400 410 420 430 435
Fuel %
Antifreeze % 0.0 0.0 0.0 0.0 0.0 0.0
Water % 0.0 0.0 0.0 0.0 0.0 0.0
Insolubles % 0.4 0.5 0.3 0.2 0.4 0.3
TBN 3.0 2.2 3.3 3.3 3.1 3.4
Blackstone Inc Comments:
There's half the amount of lead here that we saw back in July, suggesting the spike was temporary, just from something like a particle streak through a bearing. Other metals haven't really budged, or at least the changes are no greater than we expect to see from normal variation. The viscosity was able to stay within spec this time as well, and the TBN is about the same as usual at 3.0, which is a strong reading. With lead in better shape and everything else in order, we think you could go for 11K miles next time. Lead should stay low on the longer run.
Make/Model: GM 5.3L V-8
Vehicle: 2004 Chevy Tahoe
Code:
OIL Ams ASL Ams ASL Ams ASL Ams ASL Ams ASL Ams ASL
MILES IN USE 9,213 10,045 9,037 9,246 8,124 6,069
MILES ON UNIT 214,977 205,764 195,719 186,682 177,436 175,381
SAMPLE TAKEN 1/2/17 7/15/16 12/14/15 6/29/15 11/30/14 10/23/14
MAKE UP OIL 0 0 0 0 0 0
ALUMINUM 3 4 3 4 3 2
CHROMIUM 1 1 0 0 0 0
IRON 12 15 11 12 9 7
COPPER 13 11 12 10 12 10
LEAD 11 22 13 30 7 6
TIN 0 0 0 5 0 0
MOLYBDENUM 138 130 143 160 144 139
NICKEL 1 1 2 1 0 1
MANGANESE 0 0 1 0 0 0
SILVER 0 0 0 0 0 0
TITANIUM 0 0 0 0 0 0
POTASSIUM 1 2 4 4 0 0
BORON 39 42 36 61 45 53
SILICON 28 30 35 28 31 25
SODIUM 9 11 10 9 9 8
CALCIUM 3191 2928 3570 3461 3247 3475
MAGNESIUM 13 13 17 14 12 15
PHOSPHORUS 648 558 655 627 702 658
ZINC 748 628 773 800 801 767
BARIUM 0 0 0 0 0 0
SUS @ 210F 63.8 68.8 66.0 62.6 64.6 63.8
Visc @ 100C 11.29 12.64 11.88 10.94 11.51 11.29
Flashpoint 445 400 410 420 430 435
Fuel %
Antifreeze % 0.0 0.0 0.0 0.0 0.0 0.0
Water % 0.0 0.0 0.0 0.0 0.0 0.0
Insolubles % 0.4 0.5 0.3 0.2 0.4 0.3
TBN 3.0 2.2 3.3 3.3 3.1 3.4
Blackstone Inc Comments:
There's half the amount of lead here that we saw back in July, suggesting the spike was temporary, just from something like a particle streak through a bearing. Other metals haven't really budged, or at least the changes are no greater than we expect to see from normal variation. The viscosity was able to stay within spec this time as well, and the TBN is about the same as usual at 3.0, which is a strong reading. With lead in better shape and everything else in order, we think you could go for 11K miles next time. Lead should stay low on the longer run.