These are the last two analysis' on my mother's Monte Carlo. I've read on here before that when your lead number is higher than your iron that is a sign your engine might need a thicker oil to protect the bearings? Her 3.8L now has 92000 miles and runs perfectly but I was thinking on going with Schaeffer's 15W-40 PAO Blend on the next interval to see if the lead number drops.
1998 Chevrolet Monte Carlo Z34 3.8L
Schaeffer 10W-30 PAO Blend
4,130 miles on oil
87,127 Miles on Engine
Oversize Wix oil Filter 51036
[email protected] Panel Air Filter
Car is driven everyday around 50 interstate miles.
1st number is new analysis 2nd number is previous sample same interval only with M1 10W-30
code:
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Aluminum 4 4
Chromium 0 1
Iron 7 15
Copper 18 17
lead 12 6
Tin 0 2
Molybdenum 88 63
Nickel 0 0
Manganese 0 0
Silver 0 0
Titanium 0 0
Potassium 9 34
Boron 8 120
Silicon 9 9
Sodium 11 9
Calcium 2147 2822
Magnesium 7 41
Phosphorus 809 814
Zinc 973 1036
Barium 1 1
SUS Viscosity= 60.5 59.2
Flashpoint in deg.F=415 425
Fule-0.5 .5
Antifreeze=0.0 0
Water=0.0 0
Insolubles%0.5 0.4
TBN= 2.6 5 -Old Method
I did do an AutoRx flush before the run with Schaeffer's oil above. Could the AutoRX cleaning cause the higher insolubles and lead count? Any opinions on what to do?