From Polaris Labs.
Truck Odometer: 322167 mi
Miles on oil: 37000
9 quarts of makeup oil added during OCI.
Fleetguart Stratapore filter used through entire OCI.
Wear Metals:
(Element (ppm); 235k, 322k)
Iron; 42, 52
Chromium; 3, 3
Al; 4, 5
Cu; 3, 4
Lead; 9, 31
Contaminants:
Silicon; 6, 13
Sodium; 8, 6
Potassium; 62, 0
Multi-source metals:
Moly; 75, 76
Boron; 83, 38
Additive metals:
Mag; 1333, 1198
Calcium; 960, 1111
Phos; 1138, 1104
Zinc; 1439, 1471
Fuel Dilution; Soot; Water;
KV100 (cSt); 15.1, 15.1
TBN; 6.54, 6.99
Oxidation; 15, 16
Nitration; 10, 10
Polaris' Comments: Flagged data does not indicate an immediate need for maintenance action. Continue to observe the trend and monitor equipment and fluid conditions. LEAD is at a MODERATE level and may be overlay metal from main/rod bearings.
I installed this oil and filter last August and put 12k miles on running my normal duty cycle of 80% daily driver/ 20% race car trailer tower. Then in late December, I started towing travel trailers all over the place, and put 25k miles on with a more aggressive duty cycle of 50% towing/ 50% deadheading back to base. I should have changed the oil a month earlier, but it got away from me.
Iron wear is actually lower than the previous sample, with an average rate of 1.4 ppm/kmile versus 1.75 ppm/kmile back in 2013.
The worst reading is a spike in Lead, going from 9 to 31. There was one instance of using ether to start the engine on a cold day, and maybe that boumced the crank and rods around a bit. Hopefully the lead will drop over the next couple of samples. Fortunately there in no spike in Copper going along with the lead, so probably no bearing lining distress.
The previous sample showed a large spike in Potassium, and that has dropped off to 0.
I was using new bottle RT6 to top off the oil which was old bottle RT6 at initial fill. I put in a total of 9 quarts in over the 37k miles. It seems that the new formula has less Mg, more Ca, less B, and basically the same ZDDP as the old RT6.
Fuel dilution, soot, and water content are same as always. KV100 and Nitration are the same, and a slight increase in Oxidation.
There was plenty of TBN left, no doubt due to the 9 quarts of makeup oil.
I'll do the next oil change at 24k miles to monitor the Lead, then start thinking about how long to actually go for future OCI's.
Truck Odometer: 322167 mi
Miles on oil: 37000
9 quarts of makeup oil added during OCI.
Fleetguart Stratapore filter used through entire OCI.
Wear Metals:
(Element (ppm); 235k, 322k)
Iron; 42, 52
Chromium; 3, 3
Al; 4, 5
Cu; 3, 4
Lead; 9, 31
Contaminants:
Silicon; 6, 13
Sodium; 8, 6
Potassium; 62, 0
Multi-source metals:
Moly; 75, 76
Boron; 83, 38
Additive metals:
Mag; 1333, 1198
Calcium; 960, 1111
Phos; 1138, 1104
Zinc; 1439, 1471
Fuel Dilution; Soot; Water;
KV100 (cSt); 15.1, 15.1
TBN; 6.54, 6.99
Oxidation; 15, 16
Nitration; 10, 10
Polaris' Comments: Flagged data does not indicate an immediate need for maintenance action. Continue to observe the trend and monitor equipment and fluid conditions. LEAD is at a MODERATE level and may be overlay metal from main/rod bearings.
I installed this oil and filter last August and put 12k miles on running my normal duty cycle of 80% daily driver/ 20% race car trailer tower. Then in late December, I started towing travel trailers all over the place, and put 25k miles on with a more aggressive duty cycle of 50% towing/ 50% deadheading back to base. I should have changed the oil a month earlier, but it got away from me.
Iron wear is actually lower than the previous sample, with an average rate of 1.4 ppm/kmile versus 1.75 ppm/kmile back in 2013.
The worst reading is a spike in Lead, going from 9 to 31. There was one instance of using ether to start the engine on a cold day, and maybe that boumced the crank and rods around a bit. Hopefully the lead will drop over the next couple of samples. Fortunately there in no spike in Copper going along with the lead, so probably no bearing lining distress.
The previous sample showed a large spike in Potassium, and that has dropped off to 0.
I was using new bottle RT6 to top off the oil which was old bottle RT6 at initial fill. I put in a total of 9 quarts in over the 37k miles. It seems that the new formula has less Mg, more Ca, less B, and basically the same ZDDP as the old RT6.
Fuel dilution, soot, and water content are same as always. KV100 and Nitration are the same, and a slight increase in Oxidation.
There was plenty of TBN left, no doubt due to the 9 quarts of makeup oil.
I'll do the next oil change at 24k miles to monitor the Lead, then start thinking about how long to actually go for future OCI's.
Last edited:
