B-S labs.
1 qt makeup.
90% highway, 50+ mile commute 1 way, female driven.
Al 2
Cr 1
Fe 6
Cu 3
Pb 5
Sn 0
Moly 67
Ni/Mn/Ag/Ti/K 0
Boron 16
Si 5
Na 47 (down from last sample where oil was drained into a butter tub)
Ca 932
Mg 1330
Ph 1050
Zn 1322
Sus V @210F 72.6
cSt @100C 13.63
FP 380
Fuel Glycol ?
H20 0
Insol .2
TBN 3.8
Sodium dropped here as well, so it looks like anti-freeze contamination isn’t a problem for your
Subaru either. We know Shell Rotella T 5W/40 doesn't use sodium, so most of this is residual form the last
fill and should read even lower next time. Wear metals continue to look great and show no mechanical
problems developing at 123,762 total miles. Some wear actually improved with the longer oil run and with
the TBN still plenty strong at 3.8 we think the next oil can go even longer still. Try 10,500-11,000 miles and
check back then to see how things look.
1 qt makeup.
90% highway, 50+ mile commute 1 way, female driven.
Al 2
Cr 1
Fe 6
Cu 3
Pb 5
Sn 0
Moly 67
Ni/Mn/Ag/Ti/K 0
Boron 16
Si 5
Na 47 (down from last sample where oil was drained into a butter tub)
Ca 932
Mg 1330
Ph 1050
Zn 1322
Sus V @210F 72.6
cSt @100C 13.63
FP 380
Fuel Glycol ?
H20 0
Insol .2
TBN 3.8
Sodium dropped here as well, so it looks like anti-freeze contamination isn’t a problem for your
Subaru either. We know Shell Rotella T 5W/40 doesn't use sodium, so most of this is residual form the last
fill and should read even lower next time. Wear metals continue to look great and show no mechanical
problems developing at 123,762 total miles. Some wear actually improved with the longer oil run and with
the TBN still plenty strong at 3.8 we think the next oil can go even longer still. Try 10,500-11,000 miles and
check back then to see how things look.
