Gear oil recommendation for 08' Carrera S manual tranny
#1
Gear oil recommendation for 08' Carrera S manual tranny
My manual 08's Carrera S has 24k miles and I want to service the gearbox oil. The local Porsche dealer quoted me an outrageous price. The other 2 independent Porsche specialty shops quoted me much more reasonable prices around $140. However, one uses Redline while the other uses Liqui Moly (both ar full synthetic). I wonder if there is any difference between these 2 brands at all?
#5
I had a 01' 996 manual and at 60k miles when I changed the gear oil, the mechanic found some small debris while draining the old gear oil, a lesson I learned that it never hurts to be diligent than sorry. So my 08' Carrera S is now alomst 4 years with 24k miles, i thought I'll be more deligent than my prior 01' 996...
#6
I had a 01' 996 manual and at 60k miles when I changed the gear oil, the mechanic found some small debris while draining the old gear oil, a lesson I learned that it never hurts to be diligent than sorry. So my 08' Carrera S is now alomst 4 years with 24k miles, i thought I'll be more deligent than my prior 01' 996...
Almost all of the time this is normal.
My advice is if you want to change the fluid, just take it to the dealer. While mine charged me around $45/liter (approx. 3 liters) for the fluid the labor was only 0.3 hours, for my 02 Boxster 5-speed.
I think I paid less than $250 for the service. Got to chat with the techs too while the car was being serviced.
Given you'll probably change the fluid just this once while you own the car, why bother shopping around for some deal and experimenting with some other fluid?
Sincerely,
Macster.
#7
Nonetheless, I think your advice on sticking with OEM fluid is helpful. The reason I choose independent shops is because they'll give you much better personal service and sometimes provide information that dealer won't tell you.
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#8
So, by saying Clutch oil, do you mean Transmission oil?
If so, it's a mystery what's best oil. I like to change mine too, but it looks like some aftermarket oil doesn't work very well on our cars, and yet, OEM fluid doesn't work very well on track. So, if you do NOT track, I definitely recommend to just get the OEM and have someone change it.
If you track, then do some more search and if you found a good oil, let me know too!
If so, it's a mystery what's best oil. I like to change mine too, but it looks like some aftermarket oil doesn't work very well on our cars, and yet, OEM fluid doesn't work very well on track. So, if you do NOT track, I definitely recommend to just get the OEM and have someone change it.
If you track, then do some more search and if you found a good oil, let me know too!
#9
From another forum thread (http://www.6speedonline.com/forums/9...ip-manual.html), one post said that "on manual cars use delvac 75w90! this is factory fill in the 997 gt3rs and can handle high temps". I wonder if there is any truth to it? From Amazon, Mobile 1 Delvac is sold around $11/quart. My local Porsche dealer asks OEM $45/Liter bottle & $350 for service (Sunset Porsche quoted me $25/Liter but needs add shipping).
#10
From the same 6speedoneline thread above, another posted:
If you track the car change it once a year, at a minimum. If you don't track it change it every 2 to 3 years, regardless of mileage.
__________________
Matt Monson
Guard Transmission LLC
303-530-1094
Looks like this person is a Porsche transmission specialist. Based on my prior 01' 996 experience, he is right on the money. If some Porsche authority can confirm Mobile 1 delvac 75W90 is the right substitute for OEM oil, the job can be done no more expensive (< $90) than other cars in my opinion. This is the safest and least inexpensive preventive maintenance any Porsche owner should seriously consider.
What Porsche recommends of 90k miles change interval is just totally ridiculous. This reminds me of my Bimmer where BMW, because of it free in-warranty regular service, claims life-time fill auto tranny fluid, radiator coolant and 15k miles engine oil change interval. What's wrong with these German manufacturers?
If you track the car change it once a year, at a minimum. If you don't track it change it every 2 to 3 years, regardless of mileage.
__________________
Matt Monson
Guard Transmission LLC
303-530-1094
Looks like this person is a Porsche transmission specialist. Based on my prior 01' 996 experience, he is right on the money. If some Porsche authority can confirm Mobile 1 delvac 75W90 is the right substitute for OEM oil, the job can be done no more expensive (< $90) than other cars in my opinion. This is the safest and least inexpensive preventive maintenance any Porsche owner should seriously consider.
What Porsche recommends of 90k miles change interval is just totally ridiculous. This reminds me of my Bimmer where BMW, because of it free in-warranty regular service, claims life-time fill auto tranny fluid, radiator coolant and 15k miles engine oil change interval. What's wrong with these German manufacturers?
#11
Don't use Mobil Delvac 75W90 in a modern Porsche trans.
I use the Delvac in my 993 Turbo and it's great. This was the "factory fill" back in 1997.
I have UOA's on both (Delvac and 987/997 OEM fill) and they are very different.
I use the Delvac in my 993 Turbo and it's great. This was the "factory fill" back in 1997.
I have UOA's on both (Delvac and 987/997 OEM fill) and they are very different.
#12
Ok, looks like the safest approach is to order OEM oil from Sunset Porsche and have my local Porsche shop to service it. According to the user manual, it prints "Manual transmission and differential approx. 3.1 quarts / 2.9 liters transmission oil". I suppose 3 liter bottle should do it.
#13
Ok, looks like the safest approach is to order OEM oil from Sunset Porsche and have my local Porsche shop to service it. According to the user manual, it prints "Manual transmission and differential approx. 3.1 quarts / 2.9 liters transmission oil". I suppose 3 liter bottle should do it.
#15
Well, first of all I am too sure about the metal debris normal part. I have owned many cars in the past, mostly German & Japanese imports. I changed tranny fluid around every 30k miles and has never seen metal debris from the drain. For some cars, the drain plugs were magnetized and thus they did collect fined powder-like debris on them and I would call that normal. I understand that some Porsche owners drive hard and thus put more strain on the tranny. But, I don't take my Porsche to track and only drive aggressively occasionally. As a result, having metal piece debris coming out of drain is not something I call normal.
Nonetheless, I think your advice on sticking with OEM fluid is helpful. The reason I choose independent shops is because they'll give you much better personal service and sometimes provide information that dealer won't tell you.
Nonetheless, I think your advice on sticking with OEM fluid is helpful. The reason I choose independent shops is because they'll give you much better personal service and sometimes provide information that dealer won't tell you.
Unless the tranny was misbehaving prior to the drain (sometimes this prompts a fluid change in the hopes the new fluid will resurrect the transmission) some debris is nothing to get that excited about.
'course, it depends upon what the debris looks like. Some indistinct grains or a small chips which is machining swarf: No biggie. A teaspoon or more of fine metal swarf (run a magnet through the oil) which is wear swarf: A biggie. Maybe.
Regardless, an early transmission/diff fluid change is not a bad idea and some knowledgeable people (Mike Miller who writes for Bimmer) highly recommend.
The Porsche techs I talk to suggest that if one wants to modify say the tranny fluid drain interval to cut the factory drain interval by one third to one half. Thus a 90K miles drain interval becomes a 60K miles or even a 45K miles drain interval.
They do however point out that Porsche specifies say a 90K miles fluid drain interval because Porsche's testing has confirmed the fluid will hold up quite well over this span of miles, given reasonable use of course.
Sincerely,
Macster.