The 991 911, 2011 to 2019, covering the 991.1 (model years 2012 to 2016) and 991.2 (model years 2017 to 2019) Carrera, Targa, Turbo and GT models.
Shown: 991 911 GT3 in Lava Orange
Which 991 is yours?
Choose your car for its tyre pressures, tyre sizes and oil on one sheet.
Choose your car above. Its pressures, tyre sizes and oil appear here, on one sheet.
991.1 · 2011–2015
Carrera
Cold tyres, full load · check the label in your door frame
Tyre pressures
19-inch
Front2.4bar34 psiTyre235/40 ZR19
Rear2.9bar42 psiTyre285/35 ZR19
20-inch
Front2.5bar36 psiTyre245/35 ZR20
Rear3.1bar44 psiTyre295/30 ZR20
Engine oil
Grade0W-40, 5W-40 or 5W-50
3.4 litre flat-six, or 3.8 litre in the S, 4S and GTS
Porsche approval
Porsche A40
Oil and filter change
About 7.5 litres with filterspecialist figure
Notes and sources
19-inch
Carrera 4 and Targa 4 rear: 295/35 ZR19. Full-load figure. Part load: 2.1 bar (30 psi) front, 2.5 bar (36 psi) rear. Comfort pressure, only where the menu offers it, up to 270 km/h: 2.0 bar (29 psi) and 2.3 bar (33 psi) part load, 2.2 bar (31 psi) and 2.7 bar (39 psi) full load.
GTS rear: 305/30 ZR20. Full-load figure. Part load: 2.2 bar (31 psi) front, 2.7 bar (39 psi) rear. Comfort pressure, only where the menu offers it, part load: 2.2 bar (31 psi) and 2.4 bar (34 psi) on the Carrera and Carrera S, 2.1 bar (30 psi) and 2.3 bar (33 psi) on the GTS.
Approval from Porsche's current approved-oil list (October 2025). Specialist and owner sources quoting the handbook give approx. 7.5 litres with filter; not yet confirmed from a Porsche document.
3.4 litre flat-six, or 3.8 litre in the S, 4S and GTS
Porsche approval
Porsche A40
Oil and filter change
About 7.5 litres with filterspecialist figure
Notes and sources
Tyres
GTS rear: 305/30 ZR20. Full-load figure. Part load: 2.2 bar (31 psi) front, 2.7 bar (39 psi) rear. Comfort pressure, only where the menu offers it, part load: 2.2 bar (31 psi) and 2.4 bar (34 psi) on the Carrera and Carrera S, 2.1 bar (30 psi) and 2.3 bar (33 psi) on the GTS.
Approval from Porsche's current approved-oil list (October 2025). Specialist and owner sources quoting the handbook give approx. 7.5 litres with filter; not yet confirmed from a Porsche document.
Cold tyres, full load · check the label in your door frame
Tyre pressures
19-inch
Front2.4bar34 psiTyre235/40 ZR19
Rear2.9bar42 psiTyre285/35 ZR19
20-inch
Front2.5bar36 psiTyre245/35 ZR20
Rear3.1bar44 psiTyre305/30 ZR20
Engine oil
Grade0W-40, 5W-40 or 5W-50
3.4 litre flat-six, or 3.8 litre in the S, 4S and GTS
Porsche approval
Porsche A40
Oil and filter change
About 7.5 litres with filterspecialist figure
Notes and sources
19-inch
Carrera 4 and Targa 4 rear: 295/35 ZR19. Full-load figure. Part load: 2.1 bar (30 psi) front, 2.5 bar (36 psi) rear. Comfort pressure, only where the menu offers it, up to 270 km/h: 2.0 bar (29 psi) and 2.3 bar (33 psi) part load, 2.2 bar (31 psi) and 2.7 bar (39 psi) full load.
Full-load figure. Part load: 2.2 bar (31 psi) front, 2.6 bar (37 psi) rear. Comfort pressure, only where the menu offers it: 2.1 bar (30 psi) and 2.3 bar (33 psi) part load, 2.2 bar (31 psi) and 2.7 bar (39 psi) full load.
Approval from Porsche's current approved-oil list (October 2025). Specialist and owner sources quoting the handbook give approx. 7.5 litres with filter; not yet confirmed from a Porsche document.
Cold tyres, full load · check the label in your door frame
Tyre pressures
20-inch
Front2.5bar36 psiTyre245/35 ZR20
Rear3.1bar44 psiTyre305/30 ZR20
Engine oil
Grade0W-40, 5W-40 or 5W-50
3.4 litre flat-six, or 3.8 litre in the S, 4S and GTS
Porsche approval
Porsche A40
Oil and filter change
About 7.5 litres with filterspecialist figure
Notes and sources
Tyres
Full-load figure. Part load: 2.2 bar (31 psi) front, 2.6 bar (37 psi) rear. Comfort pressure, only where the menu offers it: 2.1 bar (30 psi) and 2.3 bar (33 psi) part load, 2.2 bar (31 psi) and 2.7 bar (39 psi) full load.
Approval from Porsche's current approved-oil list (October 2025). Specialist and owner sources quoting the handbook give approx. 7.5 litres with filter; not yet confirmed from a Porsche document.
Cold tyres, full load · check the label in your door frame
Tyre pressures
20-inch
Front2.6bar37 psiTyre245/35 ZR20
Rear3.3bar47 psiTyre305/30 ZR20
Engine oil
Grade0W-40, 5W-40 or 5W-50
3.8 litre twin-turbo flat-six
Porsche approval
Porsche A40
Oil and filter change
Approx. 7.5 litres with filter
Notes and sources
Tyres
Full-load figure. Part load: 2.4 bar (34 psi) front, 3.0 bar (43 psi) rear. Comfort pressure, only where the menu offers it: 2.2 bar (31 psi) and 2.5 bar (36 psi) part load, 2.3 bar (33 psi) and 2.8 bar (40 psi) full load.
3.8 litre (GT3) or 4.0 litre (RS, R) flat-six, separate oil tank
Porsche approval
Porsche A40, or Porsche C40 GT
Oil and filter change
Not published by Porschesources give 6 to 7.5 litres
Notes and sources
Tyres
GT3 RS: 265/35 ZR20 front, 325/30 ZR21 rear. Single standard figure, no part-load or comfort values. Winter tyres: 2.2 bar (32 psi) front, 2.4 bar (35 psi) rear on the GT3 and 911 R; 2.3 bar (33 psi) and 2.5 bar (36 psi) on the GT3 RS.
C40 GT was added to Porsche's list after 2022; the current list (October 2025) allows it alongside A40. Porsche's oil-level procedure for these cars differs from the Carrera; see the questions and answers for this model.
Cold tyres, full load · check the label in your door frame
Tyre pressures
19-inch
Front2.4bar34 psiTyre235/40 ZR19
Rear3.0bar43 psiTyre295/35 ZR19
20-inch
Front2.4bar34 psiTyre245/35 ZR20
Rear3.1bar44 psiTyre305/30 ZR20
Engine oil
Grade0W-40, 5W-40 or 5W-50
3.0 litre twin-turbo flat-six
Porsche approval
Porsche A40C40 for a GTS fitted with a petrol particulate filter
Oil and filter change
Approx. 8 litres with filter
Notes and sources
19-inch
Full-load figure. Part load: 2.1 bar (30 psi) front, 2.5 bar (36 psi) rear on the Carrera, 2.6 bar (37 psi) rear on the Carrera 4 and Targa 4. Not for cars with ceramic brakes (PCCB). Comfort pressure, only where the menu offers it, part load: 2.0 bar (29 psi) front, 2.2 bar (31 psi) rear on the Carrera, 2.3 bar (33 psi) rear on the Carrera 4 and Targa 4.
Full-load figure. Part load: 2.2 bar (31 psi) front, 2.6 bar (37 psi) rear. A Carrera S with the Powerkit uses the Carrera 4S figures (part-load rear 2.7 bar, 39 psi), per the handbook. Comfort pressure, only where the menu offers it: 2.0 bar (29 psi) and 2.2 bar (31 psi) part load, 2.2 bar (31 psi) and 2.7 bar (39 psi) full load.
No 991 is listed for Porsche C30. Porsche's current list gives C40 instead of A40 only for a GTS with a petrol particulate filter; a Porsche Centre can confirm from the VIN. The Carrera T shares the Carrera's 3.0-litre engine but is not named separately in the handbook.
Cold tyres, full load · check the label in your door frame
Tyre pressures
20-inch
Front2.4bar34 psiTyre245/35 ZR20
Rear3.1bar44 psiTyre305/30 ZR20
Engine oil
Grade0W-40, 5W-40 or 5W-50
3.0 litre twin-turbo flat-six
Porsche approval
Porsche A40C40 for a GTS fitted with a petrol particulate filter
Oil and filter change
Approx. 8 litres with filter
Notes and sources
Tyres
Full-load figure. Part load: 2.2 bar (31 psi) front, 2.6 bar (37 psi) rear. A Carrera S with the Powerkit uses the Carrera 4S figures (part-load rear 2.7 bar, 39 psi), per the handbook. Comfort pressure, only where the menu offers it: 2.0 bar (29 psi) and 2.2 bar (31 psi) part load, 2.2 bar (31 psi) and 2.7 bar (39 psi) full load.
No 991 is listed for Porsche C30. Porsche's current list gives C40 instead of A40 only for a GTS with a petrol particulate filter; a Porsche Centre can confirm from the VIN. The Carrera T shares the Carrera's 3.0-litre engine but is not named separately in the handbook.
Cold tyres, full load · check the label in your door frame
Tyre pressures
19-inch
Front2.4bar34 psiTyre235/40 ZR19
Rear3.0bar43 psiTyre295/35 ZR19
20-inch
Front2.4bar34 psiTyre245/35 ZR20
Rear3.1bar44 psiTyre305/30 ZR20
Engine oil
Grade0W-40, 5W-40 or 5W-50
3.0 litre twin-turbo flat-six
Porsche approval
Porsche A40C40 for a GTS fitted with a petrol particulate filter
Oil and filter change
Approx. 8 litres with filter
Notes and sources
19-inch
Full-load figure. Part load: 2.1 bar (30 psi) front, 2.5 bar (36 psi) rear on the Carrera, 2.6 bar (37 psi) rear on the Carrera 4 and Targa 4. Not for cars with ceramic brakes (PCCB). Comfort pressure, only where the menu offers it, part load: 2.0 bar (29 psi) front, 2.2 bar (31 psi) rear on the Carrera, 2.3 bar (33 psi) rear on the Carrera 4 and Targa 4.
Full-load figure. Part load: 2.2 bar (31 psi) front, 2.7 bar (39 psi) rear. Comfort pressure, only where the menu offers it: 2.0 bar (29 psi) and 2.3 bar (33 psi) part load, 2.2 bar (31 psi) and 2.7 bar (39 psi) full load.
No 991 is listed for Porsche C30. Porsche's current list gives C40 instead of A40 only for a GTS with a petrol particulate filter; a Porsche Centre can confirm from the VIN. The Carrera T shares the Carrera's 3.0-litre engine but is not named separately in the handbook.
Cold tyres, full load · check the label in your door frame
Tyre pressures
20-inch
Front2.4bar34 psiTyre245/35 ZR20
Rear3.1bar44 psiTyre305/30 ZR20
Engine oil
Grade0W-40, 5W-40 or 5W-50
3.0 litre twin-turbo flat-six
Porsche approval
Porsche A40C40 for a GTS fitted with a petrol particulate filter
Oil and filter change
Approx. 8 litres with filter
Notes and sources
Tyres
Full-load figure. Part load: 2.2 bar (31 psi) front, 2.7 bar (39 psi) rear. Comfort pressure, only where the menu offers it: 2.0 bar (29 psi) and 2.3 bar (33 psi) part load, 2.2 bar (31 psi) and 2.7 bar (39 psi) full load.
No 991 is listed for Porsche C30. Porsche's current list gives C40 instead of A40 only for a GTS with a petrol particulate filter; a Porsche Centre can confirm from the VIN. The Carrera T shares the Carrera's 3.0-litre engine but is not named separately in the handbook.
Cold tyres, full load · check the label in your door frame
Tyre pressures
20-inch
Front2.6bar37 psiTyre245/35 ZR20
Rear3.3bar47 psiTyre305/30 ZR20
Engine oil
Grade0W-40, 5W-40 or 5W-50
3.8 litre twin-turbo flat-six
Porsche approval
Porsche A40
Oil and filter change
Approx. 7.5 litres with filter
Notes and sources
Tyres
Full-load figure. Part load: 2.4 bar (34 psi) front, 3.0 bar (43 psi) rear. Comfort pressure, only where the menu offers it: 2.2 bar (31 psi) and 2.5 bar (36 psi) part load, 2.3 bar (33 psi) and 2.8 bar (40 psi) full load.
GT3 RS: 265/35 ZR20 front, 325/30 ZR21 rear. Single standard figure. GT3 RS on Cup 2 R tyres: 2.2 bar (32 psi) front, 2.5 bar (36 psi) rear. Winter tyres on either car: 2.3 bar (33 psi) front, 2.5 bar (36 psi) rear. The 911 Speedster shares the GT3 figures.
Porsche's list shows the particulate filter version for the GT3 RS and 911 Speedster only; those take C40 GT alone. Porsche's workshop manual, as quoted by an owner, and a specialist give approx. 6.4 litres with filter; not yet confirmed from a Porsche document.
Not published by Porscheone specialist gives 7.5 litres
Notes and sources
Tyres
Porsche's standard pressure. It also lists a lower performance pressure of 2.0 bar (29 psi) front and 2.3 bar (33 psi) rear. On Cup 2 R tyres: 2.5 bar (36 psi) and 2.8 bar (41 psi) standard, 2.2 bar (32 psi) and 2.5 bar (36 psi) performance. Winter tyres: 2.3 bar (33 psi) and 2.5 bar (36 psi).
OilDoes the turbocharged 991.2 need a different oil from the 991.1?
For UK cars, no. Porsche's current approved-oil list (October 2025) gives Porsche A40 for both the naturally aspirated 991.1 Carreras and the 3.0-litre turbocharged 991.2 Carreras, and for every 991 Turbo. A40 covers 0W-40, 5W-40 and 5W-50. No 991 is listed for C30. The exceptions are a 991.2 GTS fitted with a petrol particulate filter, which is listed for C40, and the GT3 family, which may also use C40 GT.
Source: Porsche Manufacturer's Certificate 12/25, Allocation of approved engine oils until MY2020 (October 2025); Great Britain is in its Group I.
OilHow do I check the oil level on a 991 GT3?
Porsche's procedure for the 991.1 GT3 and GT3 RS is different from the Carrera. With the engine at 80°C or more, the car stationary on level ground and the selector in P, D or N, let it idle for at least three minutes without touching the accelerator, then read Vehicle, then Oil measurement. Opening the engine lid for 20 seconds clears the last reading so a fresh one is taken. Before a track day Porsche advises setting the level three segments above minimum, because the oil expands when hot. Porsche treats use of up to 0.8 litres per 1,000 km as normal, and more during the first 10,000 km.
Source: Porsche Technical Information 22/15, 911 GT3: Information on measuring engine-oil level and engine oil consumption (991 GT3 and GT3 RS, from MY2014).
TyresWhere do I find the correct tyre pressures for my car?
On the tyre pressure label on the car itself, in the driver's door frame, and in the owner's handbook. The figures are for cold tyres, so check them before a drive rather than after one.
TyresWhy do some rows give more than one pressure?
Many of these cars have two sets of figures: part load, for up to two people and a little luggage, and full load. Where Porsche gives both, the main figures here are the full-load ones and the note under the row gives part load, and the Comfort pressure where the car has one. Use the figure that matches how the car is loaded, and check again when that changes.
OilWhy does the oil depend on which model I have?
Because the engine does. Most generations were built with more than one engine, and each has its own oil grade, Porsche approval and capacity. Two cars from the same year that look alike can need different oil, so look for your exact model in the oil section, not just the generation.
OilIs the oil grade all I need to check?
No. The viscosity grade (for example 0W-40 or 5W-40) is only half of it. The oil also needs the Porsche approval listed for your engine (A40, C40 or C40 GT, for example), which is printed on the bottle. Two oils with the same grade can carry different approvals.
OilHow often should the oil be changed?
Follow the service schedule in your handbook or service booklet. Many owners change it more often when the car is used on track, or does lots of short journeys that never let the oil get fully up to temperature.
GeneralWhere do the figures on this 991 page come from?
From Porsche's own documents, named and linked under each figure. Where Porsche's documents disagree, or no Porsche figure could be found, the page says To be confirmed rather than guess. If a figure here ever disagrees with the label on your car or your handbook, the car and the handbook are right.
Choosing tyresSizes, the Porsche N mark and what to ask for
Every 991 runs staggered tyres, wider at the rear. The 991.1 Carrera runs 235/40 ZR19 front with 285/35 ZR19 rear, and the Carrera and Carrera S 245/35 ZR20 with 295/30 ZR20. The 991.1 Carrera 4, Targa 4, GTS and Turbo models take 295/35 ZR19 or 305/30 ZR20 at the rear. On the 991.2, the Carrera, Carrera 4 and Targa 4 could run 235/40 ZR19 with 295/35 ZR19, and every 20-inch Carrera, Targa and Turbo uses 245/35 ZR20 with 305/30 ZR20. The GT3 and 911 R use 245/35 ZR20 and 305/30 ZR20, while the GT3 RS and GT2 RS have 265/35 ZR20 front and 325/30 ZR21 rear.
Porsche approves tyres by make, type and a specification code moulded on the sidewall next to the tyre name: N0, N1, N2 and so on. Porsche says to fit tyres of the same make, type, speed index and N code on the car, and the load index and speed letter in the size, such as 91Y, are minimums. Porsche advises replacing tyres more than six years old. After fitting new tyres, set the tyre pressure monitoring menu to the tyre type fitted and, where the menu offers it, to part or full load, because Porsche gives different pressures for each.
The 991.1 GT3, GT3 RS and 911 R, and the 991.2 GT3 RS and GT2 RS, left the factory on sports tyres developed for motorsport. Porsche notes they have reduced tread depth and warns of aquaplaning on wet roads, so reduce speed in standing water. Porsche also approves 20-inch winter tyres for these cars, which run at their own pressures, given in the notes to the pressure table.
Every 991, side by sideAll the pressures and oils on one page, with their notes
Tyre pressures
Cold pressures for summer tyres from Porsche's figures, shown at full load with part-load values in the notes; check the label on your car.
911 Carrera, Carrera 4 and Targa 4 (991.1), 19-inch
Carrera 4 and Targa 4 rear: 295/35 ZR19. Full-load figure. Part load: 2.1 bar (30 psi) front, 2.5 bar (36 psi) rear. Comfort pressure, only where the menu offers it, up to 270 km/h: 2.0 bar (29 psi) and 2.3 bar (33 psi) part load, 2.2 bar (31 psi) and 2.7 bar (39 psi) full load.
GTS rear: 305/30 ZR20. Full-load figure. Part load: 2.2 bar (31 psi) front, 2.7 bar (39 psi) rear. Comfort pressure, only where the menu offers it, part load: 2.2 bar (31 psi) and 2.4 bar (34 psi) on the Carrera and Carrera S, 2.1 bar (30 psi) and 2.3 bar (33 psi) on the GTS.
Full-load figure. Part load: 2.2 bar (31 psi) front, 2.6 bar (37 psi) rear. Comfort pressure, only where the menu offers it: 2.1 bar (30 psi) and 2.3 bar (33 psi) part load, 2.2 bar (31 psi) and 2.7 bar (39 psi) full load.
Full-load figure. Part load: 2.4 bar (34 psi) front, 3.0 bar (43 psi) rear. Comfort pressure, only where the menu offers it: 2.2 bar (31 psi) and 2.5 bar (36 psi) part load, 2.3 bar (33 psi) and 2.8 bar (40 psi) full load.
GT3 RS: 265/35 ZR20 front, 325/30 ZR21 rear. Single standard figure, no part-load or comfort values. Winter tyres: 2.2 bar (32 psi) front, 2.4 bar (35 psi) rear on the GT3 and 911 R; 2.3 bar (33 psi) and 2.5 bar (36 psi) on the GT3 RS.
Full-load figure. Part load: 2.1 bar (30 psi) front, 2.5 bar (36 psi) rear on the Carrera, 2.6 bar (37 psi) rear on the Carrera 4 and Targa 4. Not for cars with ceramic brakes (PCCB). Comfort pressure, only where the menu offers it, part load: 2.0 bar (29 psi) front, 2.2 bar (31 psi) rear on the Carrera, 2.3 bar (33 psi) rear on the Carrera 4 and Targa 4.
Full-load figure. Part load: 2.2 bar (31 psi) front, 2.6 bar (37 psi) rear. A Carrera S with the Powerkit uses the Carrera 4S figures (part-load rear 2.7 bar, 39 psi), per the handbook. Comfort pressure, only where the menu offers it: 2.0 bar (29 psi) and 2.2 bar (31 psi) part load, 2.2 bar (31 psi) and 2.7 bar (39 psi) full load.
Full-load figure. Part load: 2.2 bar (31 psi) front, 2.7 bar (39 psi) rear. Comfort pressure, only where the menu offers it: 2.0 bar (29 psi) and 2.3 bar (33 psi) part load, 2.2 bar (31 psi) and 2.7 bar (39 psi) full load.
Full-load figure. Part load: 2.4 bar (34 psi) front, 3.0 bar (43 psi) rear. Comfort pressure, only where the menu offers it: 2.2 bar (31 psi) and 2.5 bar (36 psi) part load, 2.3 bar (33 psi) and 2.8 bar (40 psi) full load.
GT3 RS: 265/35 ZR20 front, 325/30 ZR21 rear. Single standard figure. GT3 RS on Cup 2 R tyres: 2.2 bar (32 psi) front, 2.5 bar (36 psi) rear. Winter tyres on either car: 2.3 bar (33 psi) front, 2.5 bar (36 psi) rear. The 911 Speedster shares the GT3 figures.
Porsche's standard pressure. It also lists a lower performance pressure of 2.0 bar (29 psi) front and 2.3 bar (33 psi) rear. On Cup 2 R tyres: 2.5 bar (36 psi) and 2.8 bar (41 psi) standard, 2.2 bar (32 psi) and 2.5 bar (36 psi) performance. Winter tyres: 2.3 bar (33 psi) and 2.5 bar (36 psi).
3.4 litre flat-six, or 3.8 litre in the S, 4S and GTS
Grade0W-40, 5W-40 or 5W-50
Porsche approval
Porsche A40
Capacity
About 7.5 litres with filter (specialist figure)
Approval from Porsche's current approved-oil list (October 2025). Specialist and owner sources quoting the handbook give approx. 7.5 litres with filter; not yet confirmed from a Porsche document.
3.8 litre (GT3) or 4.0 litre (RS, R) flat-six, separate oil tank
Grade0W-40, 5W-40 or 5W-50 (A40); 0W-40 (C40 GT)
Porsche approval
Porsche A40, or Porsche C40 GT
Capacity
Not published by Porsche (sources give 6 to 7.5 litres)
C40 GT was added to Porsche's list after 2022; the current list (October 2025) allows it alongside A40. Porsche's oil-level procedure for these cars differs from the Carrera; see the questions and answers for this model.
911 Carrera, S, 4, 4S, Targa 4, 4S, T and GTS (991.2)
3.0 litre twin-turbo flat-six
Grade0W-40, 5W-40 or 5W-50
Porsche approval
Porsche A40 (C40 for a GTS fitted with a petrol particulate filter)
Capacity
Approx. 8 litres with filter
No 991 is listed for Porsche C30. Porsche's current list gives C40 instead of A40 only for a GTS with a petrol particulate filter; a Porsche Centre can confirm from the VIN. The Carrera T shares the Carrera's 3.0-litre engine but is not named separately in the handbook.
Porsche's list shows the particulate filter version for the GT3 RS and 911 Speedster only; those take C40 GT alone. Porsche's workshop manual, as quoted by an owner, and a specialist give approx. 6.4 litres with filter; not yet confirmed from a Porsche document.
