85911

I just bought a 2011 997.2 with a PDK and with 31,000 miles. I do most of my own work, so I am stocking up on maintenance items. I would like forum members' uses and opinions on the following:

oil: Mobil 1, 0W-40, 7.9 qts.
spark plug: Bosch FR6 NPP 332S, gap: 0.7-0.1mm, torque: new- 30 NM (22 ft-lbs.), used- 25 NM (19 ft-lbs.) (I don't use anti-seize as it is my understanding plug threads are coated with anti-sieze material from the manufacturers)
lug nut torque: 96 ft-lbs.
oil filter: ? (Mahle, Porsche?)
Coolant: My Owner's Manual recommends Porsche G40. Is this necessary?
PDK Auto Tans. fluid(wheel set): Mobilube PTX Formula A (SAE 75W-90), GL 4.5
PDK clutch hydraulic fluid: Pentosin Gear Oil FFL3
power steering fluid: Pentosin CHF 11 S or Pentosin CHF 202 (Is Pentosin necessary?)
brake fluid: Anything DOT4

Thanks.

Petza914

Where do you live or what climate will you be using the car in?

ekam

Mahle oil filter is identical to the Porsche one, it just doesn't come in Porsche packaging.

GTSpure

If you live in a hot country the recommendation is Mobil 1 5w50. Original/Mahle oil is a same and air filter This is Mann compatible original to the best of my understanding and Bosch spark plugs are original compatible.

85911

I live in St. Louis, Mo. We get pretty warm now in the summer, 90's is becoming normal, and high humidity.

Petza914

Comments in your list below.

oil: Mobil 1, 0W-40, 7.9 qts.- Nope, not a fan. I'd use Driven DI40 0W/40 year round which is a DFI specific oil with more Zinc & Phosphorous. The viscosity almost has it qualified as a 5W/40, but it was just below that threshold. If you're under warranty and need a Porsche A40 approved oil, then I'd use Motul xcess 8100 5W/40 as I've also had good results with that one before switching to Driven many years ago.

spark plug: Bosch FR6 NPP 332S, gap: 0.7-0.1mm, torque: new- 30 NM (22 ft-lbs.), used- 25 NM (19 ft-lbs.) (I don't use anti-seize as it is my understanding plug threads are coated with anti-sieze material from the manufacturers) Correct, do not use anti-seize on the spark plugs. It effects the effectiveness of the threads grounding to the head, which it has to do to work correctly. Put a little motor oil on the threads before installation. The stock plug is fine.

lug nut torque: 96 ft-lbs. You can use this or up to 116 or 118 ft lbs (Porsche changed it for cars that will be used on a track and made it retroactive). I use anti-seize on my Tittanium lug bolts and torque to 100 ft lbs. Because the threads are lubricated, that makes the dry torque equivalent higher.

oil filter: ? (Mahle, Porsche?) I use a spin on canister filter, but not sure LN Engineering makes this for the DFI cars yet. If so, get that and use either a Napa Gold or K&N filter that's compatible with their adapter. If not, I think ECS tuning makes a billet metal filter canister to replace the stock Porsche one if available - that's what I use on my Cayenne and my BMW X5. Plastic doesn't hold up well to multiple heat cycles or to road debris. Either filter brand is fine or a K&N filter insert if one is avaialbe - that's also what I use in those 2 cars with filter canisters.

Coolant: My Owner's Manual recommends Porsche G40. Is this necessary? Yes, necessary. It's pink and has a different composition than either the green or orange coolants. Use it mixed in a 50/50 ration with distilled water.

PDK Auto Tans. fluid(wheel set): Mobilube PTX Formula A (SAE 75W-90), GL 4.5 Is this what goes in the PDK. That's the best fluid for the Manaul Transmissions (all my cars), but not sure that's what's in the PDK. If so, yes, use that and only that. It's the best performing fluid for the MT cars.

PDK clutch hydraulic fluid: Pentosin Gear Oil FFL3 Don't have a PDK - can't help you with that one.

power steering fluid: Pentosin CHF 11 S or Pentosin CHF 202 (Is Pentosin necessary?) Yes, you can get this at Napa or O-Reilly.

brake fluid: Anything DOT4 Depends on how you'll be using the car. I switch all my cars to Motul RBF600 for a higher boiling point, but that also requires an annual flush, which I do in about 2 hours by filling a Motive Power Bleeder and hitting all 7 cars one right after the other. For a regular street car, it's probably not necessary and stick with a good DOT 4 fluid.

Congrats on the new car!

85911

Also, the shop manual states aluminum paste should be applied to the middle surface of the wheel, the part that mates to the hub, and to parts of the lug nut prior to reinstalling. Is this common practice?

Petza914

Not common practice for me. The less stuff that slings off a wheel near the brakes the better IMO. And the anti-seize is only used on the bolt threads, never on the ball seat of the lug bolt that mates with the wheel seat - that needs to stay dry.

Ironman88

Regarding the questions raised about the PDK trans fluids - refer to Post #26 in the thread below...

https://rennlist.com/forums/997-foru...-change-2.html

Tj40

Bear in mind PDK clutch fluid change procedure requires PIWIS tool and a very specific procedure. There is a thread here somewhere where someone did a DIY without PIWIS but it's your decision if you want to go that route.

Ironman88

Yes ^^^^^^

Also stated by Wayne Smith in the link posted above - transcribed here:

1. The PDK wet clutches connect motor power to one or the other gear shaft. This hydraulic oil is in the transmission chamber toward the motor. This requires 5.2 liters of Porsche part number 000-043-207-29 (also known as Pentosin FFL3). This number is for a one liter bottle. This oil is in the transmission chamber toward the motor. The actual amount of oil used is dependent upon whether the pan was replaced or not. This oil should be changed every 60K miles or 6 years. The pan contains a filter pad and should be changed every 120K miles or 12 years. The pan is plastic and is not re-useable once removed. Early cars had a problem with the drain plug and may require changing during the first service. Changing this oil requires a PIWIS computer to cycle the pumps at specific oil temperatures to get a full fill. There is a report that if you jack the car up on the left side you can replace the amount of oil you removed without it running out of the drain plug. This may also require cycling through gears as the car is running (and getting the oil up to temperature). I’d use extreme caution as this is a very expensive transmission to replace.

85911

Petza914 and all: Thanks much for your replies. Good information on the need for a PIWIS to change the wheel set fluid. I will rethink.

Are their similar considerations on changing the PDK transmission fluid- Pentosin Ger Oil FFL 3? I am asking this question prior to reading the shop manual which I always do.

Thanks.

Hula

Great list but just want to add G40 coolant is required but it doesn't have to be Porsche branded. Zerex G40 is the same pink stuff, a bit cheaper, and is available concentrated or pre-mixed 50/50.

Ironman88

Zerex G40 certainly can be used, but it is an HOAT that does contain Silicates. Over time, silicates collect and can be harmful to and shorten the life of water pumps. If you plan on flushing out and replacing the Zerex G40 every two years or so, no problem. Otherwise, it would be better to go with an OAT / silicate free antifreeze.

Pentosin Pentofrost SF is an OAT that is silicate free and as such is formulated for extended use.

http://www.pedrosgarage.com/Site_5/C...ntifreeze.html

https://www.germanautocenter.com/blo...an-automobile/

http://www.pentosin.net/specsheets/Pentofrost_SF.pdf

larrysb

The PDK is a little confusing, because there are two fluids involved and two very different mechanical/hydraulic sections involved, with their own independent fluids that do not mingle.

The PDK gear case uses gear oil and the pan has an integral filter. It is basically derived from a manual transmission in many respects and takes that sort of gear oil. The recommended interval is on the order of 100k miles. Some 2009 models have a pan issue and it is recommended to service the pan and replenish the gear fluid when doing the PDK clutch.

The PDK clutch has it's own hydraulic fluid, which both operates the hydraulics and baths the two clutch packs. (wet clutches - somewhat like a motorcycle).

The PDK clutch fluid is speciality stuff and it requires the shop computer to cycle the warmed-up transmission into special modes to allow full drain and refill of the PDK clutch section. The maintenance schedule says 60k miles or so many years (don't remember specifically). My experience before and after changing it at 8 years and 60k miles was that might be too long.