Service bulletin No. 18-23

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10243587
Published by NHTSA	2023-10-05
Manufacturer's number	No. 18-23
Manufacturer's date	2023-09-05
NHTSA component	ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION

NHTSA's summary

Manufacturers certificate for an overview of approved Porsche C40 engine oils.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Engine oil and lubrication

Vehicles listed
PORSCHE 718	2017
PORSCHE 718 BOXSTER	2016
PORSCHE 718 BOXSTER	2017, 2018, 2019, 2020
PORSCHE 718 BOXSTER S	2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 718 CAYMAN	2016
PORSCHE 718 CAYMAN	2017, 2018, 2019, 2020
PORSCHE 718 CAYMAN S	2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 718 SPYDER	2018 to 2019
PORSCHE 718 SPYDER	2020
PORSCHE 911	1984
PORSCHE 911	1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
PORSCHE 911	2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
PORSCHE 911 (997)	2005, 2006, 2007, 2008, 2009, 2010, 2011 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA	1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA	2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 4	2009 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 4	2012, 2013 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 4 CABRIOLET	1995, 1996, 1997, 1998 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 4 CABRIOLET	2003 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 4 GTS	2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 4S	2003 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 4S	2009 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 4S	2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA CABRIOLET	1995, 1996, 1997, 1998 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA CABRIOLET	2003 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA GTS	2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA S	2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA S CABRIOLET	2005, 2006 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT2	2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT2	2019 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT2 RS	2010, 2011 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT2 RS	2018, 2019 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT3	2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT3	2018, 2019 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT3 RS	2008 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT3 RS	2010, 2011 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT3 RS	2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT3 RS	2019 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 R	2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 SPEEDSTER	2011 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TARGA	2003 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TARGA 4	2009 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TARGA 4	2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TARGA 4S	2009 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TARGA 4S	2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TARGA 4S	2014 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TURBO	1997 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TURBO	2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TURBO S	2005 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TURBO S	2010, 2011, 2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911SC	2000 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 918	2015
PORSCHE 918 SPYDER	2015 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 918 SPYDER	2016
PORSCHE 924	1987, 1988
PORSCHE 928	1984
PORSCHE 928	1985 to 1988
PORSCHE 928	1989, 1990, 1991, 1992, 1993, 1994
PORSCHE 928	1995
PORSCHE 944	1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991
PORSCHE 944	1992 to 1993
PORSCHE 944 TURBO	1986, 1987, 1988 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 944S	1987, 1988 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 968	1991
PORSCHE 968	1992, 1993, 1994
PORSCHE 968	1995
PORSCHE 968	1997
PORSCHE 968	2001
PORSCHE 987 CAYMAN	2009
PORSCHE 996 TURBO	2002
PORSCHE 997 (911)	2008
PORSCHE BOXSTER	1996
PORSCHE BOXSTER	1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
PORSCHE BOXSTER	2012, 2013, 2014, 2015
PORSCHE BOXSTER (987)	2005, 2006, 2007, 2008, 2009, 2010, 2011 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE BOXSTER S	2000, 2001, 2002, 2003, 2004, 2005 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE BOXSTER S	2011, 2012, 2013, 2014 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE BOXSTER SPYDER	2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CABRIO	1990
PORSCHE CABRIOLET	1999
PORSCHE CARRERA	1987 to 1993
PORSCHE CARRERA	1995 to 1999
PORSCHE CARRERA	2001
PORSCHE CARRERA 2	1990
PORSCHE CARRERA 4	1989 to 1990
PORSCHE CARRERA GT	2004 to 2005
PORSCHE CARRERRA GT	2006
PORSCHE CAYENNE	2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
PORSCHE CAYENNE (E2)	2011 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE DIESEL	2013, 2014, 2015 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE E-HYBRID	2014 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE E-HYBRID	2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE GT	2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE GTS	2006, 2007, 2008, 2009, 2010 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE GTS	2013, 2014 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE GTS	2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S	2003, 2004, 2005, 2006, 2007, 2008, 2009 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S	2011, 2012, 2013, 2014, 2015 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S	2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S E-HYBRID	2015, 2016, 2017, 2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S E-HYBRID	2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S HYBRID	2011, 2012, 2013 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TRANSSYBERIA	2010 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO	2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO	2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO COUPE	2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO S	2006, 2007, 2008, 2009, 2010 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO S	2014 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO S	2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO S E-HYBRID	2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO S HYB COUPE	2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYMAN	2005
PORSCHE CAYMAN	2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
PORSCHE CAYMAN	2020
PORSCHE CAYMAN GT4	2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYMAN GT4	2020
PORSCHE CAYMAN GTS	2020
PORSCHE CAYMAN R	2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYMAN S	2005
PORSCHE CAYMAN S	2006 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYMAN S	2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYMAN S	2014 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE COUPE	1990
PORSCHE GT2	2002
PORSCHE MACAN	2014
PORSCHE MACAN	2015, 2016, 2017, 2018, 2019, 2020
PORSCHE MACAN GTS	2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE MACAN S	2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE MACAN SPORT EDITION	2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE MACAN TURBO	2015, 2016, 2017, 2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE MACAN TURBO	2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA	2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
PORSCHE PANAMERA 4	2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4 E-HYBRID	2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4 EXECUTIVE	2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4 HYBRID	2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4 HYBRID EXECUTI	2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4 HYBRID SPORT T	2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4 SPORT TURISMO	2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4S	2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4S E-HYBRID	2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4S EXECUTIVE	2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4S SPORT TURISMO	2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA GTS	2010, 2011, 2012, 2013, 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA GTS	2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA GTS SPORT TURISM	2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA S	2010, 2011, 2012, 2013, 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA S E-HYBRID	2011, 2012, 2013, 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA S HYBRID	2011, 2012, 2013, 2014 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO	2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO EXECUTIVE	2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO S	2012, 2013, 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO S E-HYBRID	2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO S HYBRID	2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO S HYBRID E	2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO S HYBRID S	2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO SPORT TURI	2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PORSCHE	1989 to 1991
PORSCHE PORSCHE	1993
PORSCHE TARGA	1990
PORSCHE TARGA	1996
PORSCHE TAYCAN	2020
PORSCHE TAYCAN 4S	2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN CROSS TURISMO	2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN TURBO	2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN TURBO S	2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE redundant BOXSTER	2017
PORSCHE redundant BOXSTER	2020
PORSCHE redundant CAYENNE E-HYBRID	2020
PORSCHE redundant CAYENNE S HYBRID	2014

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
No. 166-21-1	2024-02-08. Service bulletin. Technical information for Oil Leakage on Cylinder Head Cover: Insert Micro-Self-Locking Screw
No. 88-20	2024-02-08. Service bulletin. Technical information for a complaint - oil leaks on double clutch transmission
No. 147-18	2024-02-08. Service bulletin. Technical information for the complaint - rattling noise from around the crank drive
No. 19-23	2023-10-05. Service bulletin. Manufacturers certificate for an overview of approved Porsche A40 engine oils.
No. 17-23	2023-10-05. Service bulletin. Manufacturers certificate for an overview of approved Porsche C30 engine oils.
No. 16-23	2023-10-05. Service bulletin. Manufacturers certificate for an overview of approved Porsche C20 engine oils.
No. D647	2023-09-09. Service bulletin. Parts information on parts withdrawal for the oil pump
No. 31-20	2020-10-01. Service bulletin. List of approved engine oils for all Porsche models since 2003.
No. 88-20	2020-10-01. Service bulletin. Procedure instructions on how to address oil leaking from the double clutch transmission on the new 992.
No. 502	2020-09-02. Service bulletin. Information on parts withdrawal of outdated oil.