Originally wanted to do 10,000 km, but ended up going to 16,000 km on oil change for friends work van. Oil was 1/2 litre low, was not topped up between oil changes. The lab actually messed up the results they sent me first and when I phoned and asked why the TAN/TBN was only for the new oil they ran the oil again, went from a normal "rank" to critical. What do you guys things? From the reading I've done the higher copper is a acceptable thing with the LSx series motors? What about the NOx and COx?
Code:
2007 Chevrolet Express 2500 4.8L
OIL Valvoline Maxlife Synthetic 5w30
MILES IN USE 15,941 km
MILES 152,941 km
SAMPLE DATE 03 JUL 2015
New Used
Al 0 3
Cr 0 1
Cu 0 55
Fe 0 28
Sn 0 1
Pb 0 5
Si 0 3
Mo 0 24
Ni 0 1
Ag 0 0
K 0 2
Na 299 271
B 0 9
Ba 0 1
Ca 2083 1930
Mg 8 13
Mn 0 2
P 704 594
Zn 896 804
Glycol N
H2O N
Viscosity 40°C 61.3 64.0
Viscosity 100°C 10.3 10.7
SOOT 0.0
OXD 24
NOX 30
COX 30
SO4 6
ZDDP 0
TAN 1.62 2.45
TBN 8.1 4.1
Significance of Result / Recommended Action
Higher than expected levels of oil oxidation products may indicate that the fluid has reached
the end of its useful lifetime. Identify and evaluate the source. Consider changing the oil.
Resample to monitor. Higher than expected copper levels may indicate normal or abnormal wear
depending on what other elements are flagged. If copper is the only element flagged, continued
normal monitoring is adequate. In cases where other wear elements are flagged, this may indicate
the presence of abnormal wear. High copper levels may also indicate the presence of cooling
water leaks or scaling compounds. Identify and evaluate the source. Consider filtering or
changing the oil. Higher than expected levels of nitration may indicate that the fluid has
reached the end of its useful lifetime. Identify and evaluate the source. Consider changing the
oil. Resample to monitor.
Code:
2007 Chevrolet Express 2500 4.8L
OIL Valvoline Maxlife Synthetic 5w30
MILES IN USE 15,941 km
MILES 152,941 km
SAMPLE DATE 03 JUL 2015
New Used
Al 0 3
Cr 0 1
Cu 0 55
Fe 0 28
Sn 0 1
Pb 0 5
Si 0 3
Mo 0 24
Ni 0 1
Ag 0 0
K 0 2
Na 299 271
B 0 9
Ba 0 1
Ca 2083 1930
Mg 8 13
Mn 0 2
P 704 594
Zn 896 804
Glycol N
H2O N
Viscosity 40°C 61.3 64.0
Viscosity 100°C 10.3 10.7
SOOT 0.0
OXD 24
NOX 30
COX 30
SO4 6
ZDDP 0
TAN 1.62 2.45
TBN 8.1 4.1
Significance of Result / Recommended Action
Higher than expected levels of oil oxidation products may indicate that the fluid has reached
the end of its useful lifetime. Identify and evaluate the source. Consider changing the oil.
Resample to monitor. Higher than expected copper levels may indicate normal or abnormal wear
depending on what other elements are flagged. If copper is the only element flagged, continued
normal monitoring is adequate. In cases where other wear elements are flagged, this may indicate
the presence of abnormal wear. High copper levels may also indicate the presence of cooling
water leaks or scaling compounds. Identify and evaluate the source. Consider filtering or
changing the oil. Higher than expected levels of nitration may indicate that the fluid has
reached the end of its useful lifetime. Identify and evaluate the source. Consider changing the
oil. Resample to monitor.
Last edited:
