Here is my latest sample including my sample history. So running the oil longer + a track day could lead to higher lead number? What about the silicon number? Shouldn't it have dropped down from the previous oil change (on the previous oil change I changed my camshafts)
could be related to the two track events you listed on the slip, as well as the longer oil usage. Lead is
also found in some additives, if you have used one. We think the potassium and sodium are from the
Red Line oil, and not from antifreeze. The TBN read 3.5, showing some (not a lot) additive remaining.
If the lead is related to the track event or an additive, you could run more miles on your oil, if you
aren't racing. Try 6,500 miles next time and we will monitor lead.
DAVID: Lead increased quite a bit in this sample. Lead normally comes from the bearings, so thiscode:
Mi/Hr on Oil 3500 5162 5138 1949 6225
Mi/Hr on Unit 30500 35662 40800 42749 48974
Sample Date 8/13/2003 10/21/2003 1/18/2004 2/23/2004 6/15/2004
Aluminum 2 2 3 6 4
Chromium 1 1 1 1 1
Iron 6 10 6 12 13
Copper 4 6 4 3 6
Lead 3 2 0 2 8
Tin 0 0 0 1 0
Molybdenum 623 594 430 588 627
Nickel 0 1 0 0 0
Manganese 0 0 0 0 0
Silver 0 0 0 0 0
Titanium 0 0 0 0 0
Potassium 20 17 13 5 4
Boron 20 5 59 14 9
Silicon 13 13 12 21 20
Sodium 16 15 13 25 30
Calcium 3072 3113 2893 3045 3103
Magnesium 7 8 9 6 7
Phophorus 1275 1160 990 1197 1172
Zinc 1405 1261 1193 1312 1326
Barium 1 1 1 1 1
Viscosity 68.6 69.4 65.5 66.3 68.2
Flashpoint in F 445 400 430 460 440
Fuel % 0.5 0.5 0.5 0.5 0.5
Antifreeze % 0 0 0 0 0
Water % 0 0 0 0 0
Insolubules % 0.2 0.2 0.3 0.3 0.4
TBN 5.2 3.7 4.6 6.3 3.5
could be related to the two track events you listed on the slip, as well as the longer oil usage. Lead is
also found in some additives, if you have used one. We think the potassium and sodium are from the
Red Line oil, and not from antifreeze. The TBN read 3.5, showing some (not a lot) additive remaining.
If the lead is related to the track event or an additive, you could run more miles on your oil, if you
aren't racing. Try 6,500 miles next time and we will monitor lead.