Dear All,
Please find below the results of the latest and the previous (Mobil 1 Peak Life 5W-50, BMW E39 540iA, 17762 km, LM Top Tec 5W-40, BMW E39 540iA, 7200 km) oil analyses for my BMW.
During this oil change interval I again used 100 % E85 fuel with a modified ECU mapping. Except for a slightly higher value of Iron wear, the wear figures are the same as in the previous analyses or changed linearily with the oil usage (e.g. Copper). The only values that are worrying me are the Nitration value and the base number BN as also stated by the engineer performing the analysis. The BN value is considerably lower, although in my opinion still in a range which should not be of any concern?!
For the current oil change interval I am planning not to exceed the 20000 km.
What are your opinions?
Philipp
Code:
REPORT #3:
Subject : Mobil 1 Peak Life 5W-50, BMW E39 540iA, 22081 km (oil), 99893 km (total)
Machine : M62B44TU (E39 540iA, YoC 2002)
Oil : Mobil 1 Peak Life 5W-50
Additive : Wynn's Oil Stop Leak (as sealant maintenance)
Additive : Liqui Moly Visco-Stabil (VI improver) (added several times over oil usage, 1 liter in total)
Oil Usage : 6 month
Comments : [of the engineer performing the analyses]
The values of wear increased only slightly. This minimal wear is within normal range.
The nitration value (NOx) is increased. Possible causes: increased blow-by,
mostly caused by poor combustion, insufficient sealing between pistons and
cylinder walls or valve problems. The gasoline quality or a non-optimal
engine configuration may also have an influence.
The base number BN is considerably lower than expected.
REPORT #2:
Subject : Mobil 1 Peak Life 5W-50, BMW E39 540iA, 17762 km (oil), 77812 km (total)
Machine : M62B44TU (E39 540iA, YoC 2002)
Oil : Mobil 1 Peak Life 5W-50
Additive : Wynn's Oil Stop Leak (as sealant maintenance)
Additive : Liqui Moly Visco-Stabil (VI improver) (added after 12500 km usage)
Oil Usage : 4 month
Comments : [of the engineer performing the analyses]
The values of wear are within normal range.
The base number BN is slightly lower compared to the fresh oil reference.
All other values are within normal or expected range.
REPORT #1:
Subject : LM Top Tec 5W-40, BMW E39 540iA, 7200 km (oil), 60050 km (total)
Machine : M62B44TU (E39 540iA, YoC 2002)
Oil : Liqui Moly Top Tec 4100 5W-40
Additive : Wynn's Oil Stop Leak (as sealant maintenance)
Oil Usage : 5 month
Comments : [of the engineer performing the analyses]
The values of wear metals have risen only slightly.
This low wear is within the normal range.
The values of additives differ from the values of the fresh oil reference in our database.
The fuel content is negligible and is below the detection limit.
REPORT #3 #2 #1
CURRENT PREVIOUS PREVIOUS
WEAR
Iron Fe mg/kg 27 17 15
Chromium Cr mg/kg 0 0 1
Tin Sn mg/kg 0 0 2
Aluminium Al mg/kg 6 3 3
Nickel Ni mg/kg 0 0 0
Copper Cu mg/kg 16 13 6
Lead Pb mg/kg 4 3 3
Manganese Mn mg/kg 1 - 1
PQ-Index - OK 26 OK
CONTAMINATION
Silicon Si mg/kg 10 10 15
Potassium K mg/kg 3 2 1
Sodium Na mg/kg 6 7 0
Silver Ag mg/kg 1 - -
Water % < 0.10 < 0.10 < 0.10
IR-Glykol - negative negative negative
Fuel % < 0.30 < 0.30 < 0.30
OIL CONDITION
Viscosity @ 40°C mm²/s 111.26 110.95 80.50
Viscosity @ 100°C mm²/s 17.12 16.90 13.43
Viscosity Index - 169 166 170
Oxidation A/cm 9 11 18
Nitration A/cm 16 9 8
Sulfation A/cm 6 5 9
Dispersing Power % 95 97 92
ADDITIVES
Calzium Ca mg/kg 2475 2703 2179
Magnesium Mg mg/kg 134 94 249
Boron B mg/kg 16 34 32
Zinc Zn mg/kg 938 1072 1009
Phosphorus P mg/kg 666 821 826
Barium Ba mg/kg 0 0 0
Molybdenum Mo mg/kg 60 61 2
Sulfur S mg/kg 2179 2482 3420
ADDITIONAL TESTS
BN mgKOH/g 6.50 8.00 7.27
Please find below the results of the latest and the previous (Mobil 1 Peak Life 5W-50, BMW E39 540iA, 17762 km, LM Top Tec 5W-40, BMW E39 540iA, 7200 km) oil analyses for my BMW.
During this oil change interval I again used 100 % E85 fuel with a modified ECU mapping. Except for a slightly higher value of Iron wear, the wear figures are the same as in the previous analyses or changed linearily with the oil usage (e.g. Copper). The only values that are worrying me are the Nitration value and the base number BN as also stated by the engineer performing the analysis. The BN value is considerably lower, although in my opinion still in a range which should not be of any concern?!
For the current oil change interval I am planning not to exceed the 20000 km.
What are your opinions?
Philipp
Code:
REPORT #3:
Subject : Mobil 1 Peak Life 5W-50, BMW E39 540iA, 22081 km (oil), 99893 km (total)
Machine : M62B44TU (E39 540iA, YoC 2002)
Oil : Mobil 1 Peak Life 5W-50
Additive : Wynn's Oil Stop Leak (as sealant maintenance)
Additive : Liqui Moly Visco-Stabil (VI improver) (added several times over oil usage, 1 liter in total)
Oil Usage : 6 month
Comments : [of the engineer performing the analyses]
The values of wear increased only slightly. This minimal wear is within normal range.
The nitration value (NOx) is increased. Possible causes: increased blow-by,
mostly caused by poor combustion, insufficient sealing between pistons and
cylinder walls or valve problems. The gasoline quality or a non-optimal
engine configuration may also have an influence.
The base number BN is considerably lower than expected.
REPORT #2:
Subject : Mobil 1 Peak Life 5W-50, BMW E39 540iA, 17762 km (oil), 77812 km (total)
Machine : M62B44TU (E39 540iA, YoC 2002)
Oil : Mobil 1 Peak Life 5W-50
Additive : Wynn's Oil Stop Leak (as sealant maintenance)
Additive : Liqui Moly Visco-Stabil (VI improver) (added after 12500 km usage)
Oil Usage : 4 month
Comments : [of the engineer performing the analyses]
The values of wear are within normal range.
The base number BN is slightly lower compared to the fresh oil reference.
All other values are within normal or expected range.
REPORT #1:
Subject : LM Top Tec 5W-40, BMW E39 540iA, 7200 km (oil), 60050 km (total)
Machine : M62B44TU (E39 540iA, YoC 2002)
Oil : Liqui Moly Top Tec 4100 5W-40
Additive : Wynn's Oil Stop Leak (as sealant maintenance)
Oil Usage : 5 month
Comments : [of the engineer performing the analyses]
The values of wear metals have risen only slightly.
This low wear is within the normal range.
The values of additives differ from the values of the fresh oil reference in our database.
The fuel content is negligible and is below the detection limit.
REPORT #3 #2 #1
CURRENT PREVIOUS PREVIOUS
WEAR
Iron Fe mg/kg 27 17 15
Chromium Cr mg/kg 0 0 1
Tin Sn mg/kg 0 0 2
Aluminium Al mg/kg 6 3 3
Nickel Ni mg/kg 0 0 0
Copper Cu mg/kg 16 13 6
Lead Pb mg/kg 4 3 3
Manganese Mn mg/kg 1 - 1
PQ-Index - OK 26 OK
CONTAMINATION
Silicon Si mg/kg 10 10 15
Potassium K mg/kg 3 2 1
Sodium Na mg/kg 6 7 0
Silver Ag mg/kg 1 - -
Water % < 0.10 < 0.10 < 0.10
IR-Glykol - negative negative negative
Fuel % < 0.30 < 0.30 < 0.30
OIL CONDITION
Viscosity @ 40°C mm²/s 111.26 110.95 80.50
Viscosity @ 100°C mm²/s 17.12 16.90 13.43
Viscosity Index - 169 166 170
Oxidation A/cm 9 11 18
Nitration A/cm 16 9 8
Sulfation A/cm 6 5 9
Dispersing Power % 95 97 92
ADDITIVES
Calzium Ca mg/kg 2475 2703 2179
Magnesium Mg mg/kg 134 94 249
Boron B mg/kg 16 34 32
Zinc Zn mg/kg 938 1072 1009
Phosphorus P mg/kg 666 821 826
Barium Ba mg/kg 0 0 0
Molybdenum Mo mg/kg 60 61 2
Sulfur S mg/kg 2179 2482 3420
ADDITIONAL TESTS
BN mgKOH/g 6.50 8.00 7.27