Hi,
This is the sixth UOA on Mobil's Delvac 1 5w-40 CH-4/SJ oil used in this engine
Ten UOA's were undertaken over the last three years
Details:
Car - PORSCHE - MY89 - 928S4 Auto (alloy DOHC 32v water cooled V8 @ 320hp)
Speedo - 145168kms (90150miles)
Oil - Mobil Delvac 1 5w-40 CH-4/SJ
Oil/filter change date - 14/9/04
Distance since Oil/filter changed - 8078kms (5016miles)
Time since last UOA - approx. six months
Distance since last UOA - 2491kms (1547miles)
Oil used since fill - nil
Date of this sample - 16/9/05
Use in this period - 5% town,12% urban,83% hiway
Avg speed in this period - 68 km/h (42 mph)
(includes some sustained running at 100+mph @ 33+C)
Fuel economy in this period - 12.1ltr/100km
Ambient in this period - +42C high to -2C low
Humidity in this period - 98% highest
The columns below are as follows;
Col 1 = this UOA
Col 2 = [?] average of the three UOA's at OC point
Oil Condition;
Viscosity @40C 89 [90]
Water 0.08%
Soot Index 0.0
Sodium 3
TAN 3
Lab. Report Summary
ExxonMobil's rating now - "Normal"
Status-Excellent for continued use
Last Report - "Normal"
Elemental ( & wear metal ) Analysis;
Iron 14 [11]
Aluminium 5 [5]
Chromium 1 [1]
Copper 3 [4]
Lead 5 [8]
Silicon 4 [5]
Sodium 3 [5]
Tin
As the oil was 12 months old it was changed at this point
I invite your comments
Regards
Doug
This is the sixth UOA on Mobil's Delvac 1 5w-40 CH-4/SJ oil used in this engine
Ten UOA's were undertaken over the last three years
Details:
Car - PORSCHE - MY89 - 928S4 Auto (alloy DOHC 32v water cooled V8 @ 320hp)
Speedo - 145168kms (90150miles)
Oil - Mobil Delvac 1 5w-40 CH-4/SJ
Oil/filter change date - 14/9/04
Distance since Oil/filter changed - 8078kms (5016miles)
Time since last UOA - approx. six months
Distance since last UOA - 2491kms (1547miles)
Oil used since fill - nil
Date of this sample - 16/9/05
Use in this period - 5% town,12% urban,83% hiway
Avg speed in this period - 68 km/h (42 mph)
(includes some sustained running at 100+mph @ 33+C)
Fuel economy in this period - 12.1ltr/100km
Ambient in this period - +42C high to -2C low
Humidity in this period - 98% highest
The columns below are as follows;
Col 1 = this UOA
Col 2 = [?] average of the three UOA's at OC point
Oil Condition;
Viscosity @40C 89 [90]
Water 0.08%
Soot Index 0.0
Sodium 3
TAN 3
Lab. Report Summary
ExxonMobil's rating now - "Normal"
Status-Excellent for continued use
Last Report - "Normal"
Elemental ( & wear metal ) Analysis;
Iron 14 [11]
Aluminium 5 [5]
Chromium 1 [1]
Copper 3 [4]
Lead 5 [8]
Silicon 4 [5]
Sodium 3 [5]
Tin
As the oil was 12 months old it was changed at this point
I invite your comments
Regards
Doug