Hi,
this is the latest Used Oil Analysis result from my Porsche Boxster (986) 2.7ltr Tiptronic
Engine data
M9622 & Tiptronic @ 126658 kms (78655 miles)
Operation over 15410 kms (9570 miles) - 17+ months
A number of long high speed trips (80%) and a small amount (20%) of Urban running. Revs rarely above 6500. An on-road water pump failure occurred. The water pump was replaced but the oil was not changed
The car is located in the Australian Tropics - humidity up to 98%, minimum temperature in period -4C, highest temperature 42C. Normal cold start range 15-27C
While I was in Europe the car stood idle for about 7 weeks
No top up lubricant was added
Laboratory: Mobil, Yarraville Melbourne
Lubricant: Mobil's Delvac 1 5w-40 (CI-4/SL)
(Previous Report's results shown in brackets - oldest to right)
Lubricant condition:
Water = 0.00 (0.00) (NA)
Fuel = 0.00 (0.00) (NA)
Viscosity @ 40C = 89 (87) (88) cSt
TBN = NA (NA) (6.4)
TAN = 4.7 (3.3) (NA)
Soot Index = 0.1 (0.1) (NA)
PQ Index =
Elemental analysis:
Iron = 14 (3) (12)
Aluminium = 7 ( Chromium = 1 ( Copper = 16 ( Lead = 1 ( Potassium = 3 (2) (6)
Silicon = 14 (8) (18 due to gasket sealant)
Sodium = 1 (1) (5)
Tin =
Summary
Mobil's Lab has not taken 100C viscosity readings now for some years - in their opinion only viscosity at 40C is relevant. They only use TAN instead of TBN in UOAs
Whilst the lubricant was obviously still suitable for continued use I changed it and the filter due to an impending long (3500kms/2173miles) high speed journey next week
this is the latest Used Oil Analysis result from my Porsche Boxster (986) 2.7ltr Tiptronic
Engine data
M9622 & Tiptronic @ 126658 kms (78655 miles)
Operation over 15410 kms (9570 miles) - 17+ months
A number of long high speed trips (80%) and a small amount (20%) of Urban running. Revs rarely above 6500. An on-road water pump failure occurred. The water pump was replaced but the oil was not changed
The car is located in the Australian Tropics - humidity up to 98%, minimum temperature in period -4C, highest temperature 42C. Normal cold start range 15-27C
While I was in Europe the car stood idle for about 7 weeks
No top up lubricant was added
Laboratory: Mobil, Yarraville Melbourne
Lubricant: Mobil's Delvac 1 5w-40 (CI-4/SL)
(Previous Report's results shown in brackets - oldest to right)
Lubricant condition:
Water = 0.00 (0.00) (NA)
Fuel = 0.00 (0.00) (NA)
Viscosity @ 40C = 89 (87) (88) cSt
TBN = NA (NA) (6.4)
TAN = 4.7 (3.3) (NA)
Soot Index = 0.1 (0.1) (NA)
PQ Index =
Elemental analysis:
Iron = 14 (3) (12)
Aluminium = 7 ( Chromium = 1 ( Copper = 16 ( Lead = 1 ( Potassium = 3 (2) (6)
Silicon = 14 (8) (18 due to gasket sealant)
Sodium = 1 (1) (5)
Tin =
Summary
Mobil's Lab has not taken 100C viscosity readings now for some years - in their opinion only viscosity at 40C is relevant. They only use TAN instead of TBN in UOAs
Whilst the lubricant was obviously still suitable for continued use I changed it and the filter due to an impending long (3500kms/2173miles) high speed journey next week