Okay call me crazy, but my initial report showed Zinc and Phos at identical levels. The lab generously agreed to redo the test, but the differences in some of the results concern me a bit. Take a look - amended numbers for the most recent test are in [brackets]:
Code:
Oil New M1 TDT Mobil 1 TDT Castrol (GC) Castrol (GC) Univ/Avg
w/supersyn
Weight 5W/40 5W/40 0W/30 0W/30
Makup qts 1.0 0.5 0.5 0.0
Miles on oil 5,235 5,666 4,845 4,998 [5,100]
Miles on engine 84,534 79,299 58,937 54,092 [n/a]
Sample Date 09/01/08 05/24/08 03/03/07 12/01/06
Aluminum 2 [1] 2 3 3 [3]
Chromium 1 [1] 1 1 1 [1]
Iron 8 [7] 11 55 40 [22]
Copper 6 [6] 2 6 10 [5]
Lead 0 [1] 1 10 4 [6]
Tin 1 [0] 0 0 0 [1]
Molybdenm 30 [5] 11 3 6 [52]
Nickel 0 [0] 0 1 1 [1]
Manganese 1 [0] 0 1 1 [1]
Silver 0 [0] 0 0 0 [0]
Titanium 0 [0] 0 0 0 [0]
Potassium 0 [2] 1 0 2 [1]
Boron 15 [24] 30 0 6 [39]
Silicon 0 [12] 7 5 11 [8]
Sodium 1 [7] 8 15 18 [20]
Calcium 2,635 [2640] 2,453 1,588 1,778 [2,130]
Magnesium 514 [616] 446 425 468 [259]
Phosphorus 1,108 [1,180] 980 796 887 [839]
Zinc 1,108 [1,459] 1,304 932 1084 [992]
Barium 0 0 0 0 [5]
*Amended numbers in [brackets]
*for most recent
Sus Visco (210F) 72.2 70.6 64.7 63.4 s/b 65-78
cSt Visco (100C) 13.54 13.10 11.52 11.16 s/b 11.6 - 15.3
Flashpoint (F) 370 405 355 375 s/b >375
Fuel % TR b
Antifreeze % 0.0 0.0 0.0 0.0 s/b 0.0
Water % 0.0 0.0 0.0 0.0 s/b
Insolubles 0.4 0.3 0.3 0.3 s/b
TBN 4.6 4.2 3.8 3.6 S/b >1.0
Most concerning is the jump in silicone - 0 to 12! If the silicone numbers are accurate I know how to address this, but it seems to be a large variance from test to test - with the same oil sample. I know we're talking ppm values, but is this within normal test tolerances?
Moly, Boron and Sodium also show large relative percentage changes ... again, is this within test tolerance?
Code:
Oil New M1 TDT Mobil 1 TDT Castrol (GC) Castrol (GC) Univ/Avg
w/supersyn
Weight 5W/40 5W/40 0W/30 0W/30
Makup qts 1.0 0.5 0.5 0.0
Miles on oil 5,235 5,666 4,845 4,998 [5,100]
Miles on engine 84,534 79,299 58,937 54,092 [n/a]
Sample Date 09/01/08 05/24/08 03/03/07 12/01/06
Aluminum 2 [1] 2 3 3 [3]
Chromium 1 [1] 1 1 1 [1]
Iron 8 [7] 11 55 40 [22]
Copper 6 [6] 2 6 10 [5]
Lead 0 [1] 1 10 4 [6]
Tin 1 [0] 0 0 0 [1]
Molybdenm 30 [5] 11 3 6 [52]
Nickel 0 [0] 0 1 1 [1]
Manganese 1 [0] 0 1 1 [1]
Silver 0 [0] 0 0 0 [0]
Titanium 0 [0] 0 0 0 [0]
Potassium 0 [2] 1 0 2 [1]
Boron 15 [24] 30 0 6 [39]
Silicon 0 [12] 7 5 11 [8]
Sodium 1 [7] 8 15 18 [20]
Calcium 2,635 [2640] 2,453 1,588 1,778 [2,130]
Magnesium 514 [616] 446 425 468 [259]
Phosphorus 1,108 [1,180] 980 796 887 [839]
Zinc 1,108 [1,459] 1,304 932 1084 [992]
Barium 0 0 0 0 [5]
*Amended numbers in [brackets]
*for most recent
Sus Visco (210F) 72.2 70.6 64.7 63.4 s/b 65-78
cSt Visco (100C) 13.54 13.10 11.52 11.16 s/b 11.6 - 15.3
Flashpoint (F) 370 405 355 375 s/b >375
Fuel % TR b
Antifreeze % 0.0 0.0 0.0 0.0 s/b 0.0
Water % 0.0 0.0 0.0 0.0 s/b
Insolubles 0.4 0.3 0.3 0.3 s/b
TBN 4.6 4.2 3.8 3.6 S/b >1.0
Most concerning is the jump in silicone - 0 to 12! If the silicone numbers are accurate I know how to address this, but it seems to be a large variance from test to test - with the same oil sample. I know we're talking ppm values, but is this within normal test tolerances?
Moly, Boron and Sodium also show large relative percentage changes ... again, is this within test tolerance?