NHTSA ID Number: 11028536
Manufacturer Communication Number: No. 50-25
TSB/Document Date: 2026-02-06
Summary
Manufacturers certificate for an Overview of Approved Porsche
C40 GT Engine Oils. MY14-19 affected.
Freigabe/Approval
Manufacturer's Certificate
50/25
ENU
1701
1
Overview of Approved Porsche C40 GT Engine Oils (50/25)
Information
The period of validity for the approved engine oil is between 2 and 3 years. The expiration date of the approval
is given in the last column in the list.
Once this validity period has elapsed, the approval in question is revoked unless an extension is requested by
the relevant manufacturer.
Revision:
This bulletin replaces bulletin Group 1 07/24, dated March 25, 2024.
Model Year:
As of 2014 up to 2019
Vehicle Type:
All Porsche vehicles, up to and including MY 2020, for which Porsche C40 GT engine oils are allocated:
991: 911 GT3, 911 GT3 RS, 911 R, 911 GT-Speedster
Overview:
Manufacturer
EXXONMOBIL
Corporation
Sales Areas:
Viscosity
SAE
Oil designation
Mobile 1 C40 GT
0W-40
Sales area
Worldwide
excluding Russia
and Belarus
valid until
30.06.2026
The respective sales area is also listed in order to clarify where the approved oils are available. Here are the
meanings of the symbols:
WW
Worldwide
ESP
Spain
EU
Europe
FIN
Finland
E-EU
Eastern Europe
FRA
France
USA
United States of America
GB
Great Britain and Northern Ireland
C-America
Central America
IRL
Ireland
N. America
North America
JAP
Japan
S. America
South America
MEX
Mexico
AF
Africa
NOR
Norway
Asia
Asia
NZL
New Zealand
FSU
Former Soviet Union
RUS
Russia
BS
Baltic countries
SCG
Croatia
AfterSales
Jan 14, 2026
Page 1 of 2
1
Freigabe/Approval
1701
Miscibility:
ENU
Manufacturer's Certificate
50/25
AUS
Australia
SVK
Slovakia
AUT
Austria
SWE
Sweden
BRA
Brazil
TWN
Taiwan
CAN
Canada
UAE
United Arab Emirates
CH
Switzerland
UKR
Ukraine
CHN
China
VNM
Vietnam
DEU
Germany
ZA
South Africa
All engine oils approved by Porsche can be mixed provided they are of the same Porsche oil specification.
This means that it is not necessary to flush the engine when the oil is changed if another type of oil is used.
However, since every brand of oil has a specially adapted unique composition, the same brand and type of oil
should be used for topping up between oil change intervals if possible.
Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training courses. They are
written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special tools may be necessary in
order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the safe operation of your vehicle, and
may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and safely. Part numbers listed in these bulletins
are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a discrepancy, the work procedures in the PIWIS Tester
are the ones that must be followed.
© 2026 Porsche Cars North America, Inc.
Jan 14, 2026
Page 2 of 2
AfterSales
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TSB/Document ID: No. 50-25
Replacement Service Bulletin Number:
MFR Communication Date: 2026-01-15
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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