This is a car with 70,000 miles, but the engine was rebuilt 4,000 miles ago. Old cylinders, but new rings and bearings. Most of the miles are track miles at Drivers Education events. I am an instructor so they tend to be pretty hard miles.
The car has high performance valve springs. About 800 miles into this oil change I got nervous about the ZDDP in the oil and added a bottle of GM EOS which probably accounts for the high numbers in this sample. I have switched this oil out for Brad Penn 20W-50.
Sample Date
ALUMINUM 3
CHROMIUM 2
IRON 20
COPPER 8
LEAD 216
TIN 0
MOLYBDENUM 398
NICKEL 3
SILVER 0
TITANIUM 0
POTASSIUM 1
BORON 65
SILICON 13
SODIUM 53
CALCIUM 2656
MAGNESIUM 67
PHOSPHORUS 1329
ZINC 1510
BARIUM 1
cSt Viscosity @ 100°C 95.8
SUS Viscosity @ 210°F 19.3
Flashpoint in °F 410
Fuel % Antifreeze % ?
Water % 0
Insolubles % 0.2
TBN
TAN
ISO Code
These are the comments from Blackstone;
The track events are one reason for the high iron, from steel parts. It's due to the stress the engine endures. That's why it was good that you changed this oil to get rid of those excess metals. The high lead is from leaded (racing) gasoline - not from bearings. Redline 20W/50 starts out with ~25 ppm of sodium
and ~12 ppm of silicon as additive plus a lot of moly. They may be using more sodium now given the amount we found in your oil. That additive will mask sodium from coolant if your engine isn't air-cooled. Suggest 500-mile oil changes to keep iron down
Thanks,
rickdm
The car has high performance valve springs. About 800 miles into this oil change I got nervous about the ZDDP in the oil and added a bottle of GM EOS which probably accounts for the high numbers in this sample. I have switched this oil out for Brad Penn 20W-50.
Sample Date
ALUMINUM 3
CHROMIUM 2
IRON 20
COPPER 8
LEAD 216
TIN 0
MOLYBDENUM 398
NICKEL 3
SILVER 0
TITANIUM 0
POTASSIUM 1
BORON 65
SILICON 13
SODIUM 53
CALCIUM 2656
MAGNESIUM 67
PHOSPHORUS 1329
ZINC 1510
BARIUM 1
cSt Viscosity @ 100°C 95.8
SUS Viscosity @ 210°F 19.3
Flashpoint in °F 410
Fuel % Antifreeze % ?
Water % 0
Insolubles % 0.2
TBN
TAN
ISO Code
These are the comments from Blackstone;
The track events are one reason for the high iron, from steel parts. It's due to the stress the engine endures. That's why it was good that you changed this oil to get rid of those excess metals. The high lead is from leaded (racing) gasoline - not from bearings. Redline 20W/50 starts out with ~25 ppm of sodium
and ~12 ppm of silicon as additive plus a lot of moly. They may be using more sodium now given the amount we found in your oil. That additive will mask sodium from coolant if your engine isn't air-cooled. Suggest 500-mile oil changes to keep iron down
Thanks,
rickdm