Weather is warming up. Towing travel trailers. 14,500 miles on this OCI.
Polaris comments:
OXIDATION is at a SIGNIFICANT level. Drain interval may be over-extended, or unit may be running too hot. Viscosity is
MODERATELY HIGH. Causes include contamination, oxidation, incorrectly identified viscosity grade, or adding a different
viscosity grade to the component. VISCOSITY INCREASE may be due to lubricant oxidation. Base Number is SLIGHTLY LOW. As
Base Number depletes, the ability to neutralize acids is diminished. Cylinder region metals (pistons, rings, liners etc,) are at a
MINOR LEVEL; Soot is at a MINOR level and is not yet cause for concern. Monitor future samples for increasing levels. Elevated
soot reduces combustion efficiency and may indicate varying load conditions, malfunctioning EGR, exhaust restriction, or a
timing/air-to-fuel ratio imbalance. Maintenance action indicated at time of submission (fluid/filter change , filtration, etc.) will
have corrected the issue this system is exhibiting. No further maintenance action is recommended at this time. Please provide
missing application and sump information.
Polaris has flagged oxidation on this sample as significant. I shortened this interval 20% to reduce oxidation, yet it has increased over the last sample. And KV100 has increased out of grade, even more than the last sample. The Cummins engine has a jacket water oil cooler, and coolant operating temperature has been steady at 200F regardless of whether I am towing or not. I need to start reading oil temperature separately. Maybe a Scangauge?
Soot at 2.2% should have been lower than the previous sample, but it was the same despite the shorter OCI. I have been getting an intermittent error code complaining about Low EGR Valve voltage.
I supplemented the new fill of RT6 with 5.5 oz of Redline ZDDP additive to see if it could reduce the oxidation. But based on this UOA, I don't think it will help much. The oxidation problem seems to be trending worse.
Polaris comments:
OXIDATION is at a SIGNIFICANT level. Drain interval may be over-extended, or unit may be running too hot. Viscosity is
MODERATELY HIGH. Causes include contamination, oxidation, incorrectly identified viscosity grade, or adding a different
viscosity grade to the component. VISCOSITY INCREASE may be due to lubricant oxidation. Base Number is SLIGHTLY LOW. As
Base Number depletes, the ability to neutralize acids is diminished. Cylinder region metals (pistons, rings, liners etc,) are at a
MINOR LEVEL; Soot is at a MINOR level and is not yet cause for concern. Monitor future samples for increasing levels. Elevated
soot reduces combustion efficiency and may indicate varying load conditions, malfunctioning EGR, exhaust restriction, or a
timing/air-to-fuel ratio imbalance. Maintenance action indicated at time of submission (fluid/filter change , filtration, etc.) will
have corrected the issue this system is exhibiting. No further maintenance action is recommended at this time. Please provide
missing application and sump information.
Polaris has flagged oxidation on this sample as significant. I shortened this interval 20% to reduce oxidation, yet it has increased over the last sample. And KV100 has increased out of grade, even more than the last sample. The Cummins engine has a jacket water oil cooler, and coolant operating temperature has been steady at 200F regardless of whether I am towing or not. I need to start reading oil temperature separately. Maybe a Scangauge?
Soot at 2.2% should have been lower than the previous sample, but it was the same despite the shorter OCI. I have been getting an intermittent error code complaining about Low EGR Valve voltage.
I supplemented the new fill of RT6 with 5.5 oz of Redline ZDDP additive to see if it could reduce the oxidation. But based on this UOA, I don't think it will help much. The oxidation problem seems to be trending worse.