996 engine lubrication
07-16-2012, 07:30 AM
#18
Instructor
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07-16-2012, 11:31 AM
#19
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Oil specs
You've obviously omitted several facts which hopefully your mechanics had at hand when they made their assessment, and which an intelligent person would need to know to answer your question.
How many miles/year you drive? Is the car driven year-round? Is it driven daily? Do you ever track it? How many miles on the engine? What is the temperature range where you live?
My extended warranty mandates oil+filter each 6 months or 5000 miles, so naturally that is what I do. The official dealer here uses Penzoil, my indie offers Mobil-1 for those who insist, but recommends some German marque synthetic which they use in their racing team cars. This is the tropics and they all agree on 5W-40. I don't know where other than perhaps the bowels of hell that one would recommend 10/* or 20/* for year-round use.
How many miles/year you drive? Is the car driven year-round? Is it driven daily? Do you ever track it? How many miles on the engine? What is the temperature range where you live?
My extended warranty mandates oil+filter each 6 months or 5000 miles, so naturally that is what I do. The official dealer here uses Penzoil, my indie offers Mobil-1 for those who insist, but recommends some German marque synthetic which they use in their racing team cars. This is the tropics and they all agree on 5W-40. I don't know where other than perhaps the bowels of hell that one would recommend 10/* or 20/* for year-round use.
Yearyl oil change minimum due to water adsorption regardless of mileage.
12k mile oil change interval for high performance synthetics ( according to the manufacturer).
I plan on starting an oil analysis program for my Porsche so I know for certain.
07-16-2012, 11:35 AM
#20
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Porsche recommends 10W40. 20W50 if you are racing. 0W40 and 10W40 have different viscousities at spring and fall temperatures but almost identical above 85 F. Yearly oil change minimum due to water adsorption.
07-16-2012, 12:37 PM
#21
Burning Brakes
Without turning this into yet ANOTHER oil thread, the last time I looked at the recommended oils on the approved list for the 996, it was 0-40 and 5-40. Never saw 20-50 anywhere for the 996 engine, and don't recall 10-40 either, but maybe for a few specific oils. Viscosity is temperature related, not season related. Unless you care not for the wear your engine experiences before it is up to operating temperature, 20-50 is too viscous. Viscosity and lubrosity have nothing to do wih each other. It is strictly a manufacturing tolerance and desired oil flow at critical points that determines what viscosity is desired. Older engines that had larger tolerances required 20-50. Tighter tolerances and the motor oils use as hydraulic fluid in items such as Variocam require light viscosity. Lubrosity depends on the formula and additives desired, which is seemily a moving target as formulas change, and is almost more subjective than objective. Just my $0.02.
07-16-2012, 01:14 PM
#22
Three Wheelin'
Without turning this into yet ANOTHER oil thread, the last time I looked at the recommended oils on the approved list for the 996, it was 0-40 and 5-40. Never saw 20-50 anywhere for the 996 engine, and don't recall 10-40 either, but maybe for a few specific oils. Viscosity is temperature related, not season related. Unless you care not for the wear your engine experiences before it is up to operating temperature, 20-50 is too viscous. Viscosity and lubrosity have nothing to do wih each other. It is strictly a manufacturing tolerance and desired oil flow at critical points that determines what viscosity is desired. Older engines that had larger tolerances required 20-50. Tighter tolerances and the motor oils use as hydraulic fluid in items such as Variocam require light viscosity. Lubrosity depends on the formula and additives desired, which is seemily a moving target as formulas change, and is almost more subjective than objective. Just my $0.02.
Here is the most recent approved oils list I have seen.
http://www.pedrosgarage.com/Site_3/P...oved_Oils.html
Note to others, if your still referring to your 10 year old owners manual guess what? Things change.
07-17-2012, 07:34 PM
#27
Race Director
Look for A40 on the oil container. This is the tag that means the oil is approved for Porsche sports cars.
Unless the Ruf recommendation was for an engine it reworked Ruf's recommendation is worthless as far as I'm concerned.
Sincerely,
Macster.
07-17-2012, 08:52 PM
#28
RAC Performance (formerly RUF) changed my oil and used Mobil 1 0W-40 on my na 996.
07-17-2012, 10:03 PM
#29
Rennlist Member
If by "supercharged" you mean turbo-charged and specifically the 996 Turbo, Porsche recommends, only approves of Mobil 1 0w-40 (I do not think there is another brand of 0w-40 oil on the approved oils list, but I may be wrong), various brands of 5w-40, and Mobil 1 5w-50 (not a typo for 15w-50!).
Look for A40 on the oil container. This is the tag that means the oil is approved for Porsche sports cars.
Unless the Ruf recommendation was for an engine it reworked Ruf's recommendation is worthless as far as I'm concerned.
Sincerely,
Macster.
Look for A40 on the oil container. This is the tag that means the oil is approved for Porsche sports cars.
Unless the Ruf recommendation was for an engine it reworked Ruf's recommendation is worthless as far as I'm concerned.
Sincerely,
Macster.
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996 RUF Kompressor 4S
Prodriver's comment "Just noticed, I assume your car is Ruf supercharged? This may affect proper oil selection & I would think Ruf Dallas should know."
Your 996 Turbo is metzger engine. 996 4S is M96, not nearly as strong as your Turbo cyls
07-17-2012, 11:32 PM
#30
Race Director
Macster,
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996 RUF Kompressor 4S
Prodriver's comment "Just noticed, I assume your car is Ruf supercharged? This may affect proper oil selection & I would think Ruf Dallas should know."
Your 996 Turbo is metzger engine. 996 4S is M96, not nearly as strong as your Turbo cyls
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996 RUF Kompressor 4S
Prodriver's comment "Just noticed, I assume your car is Ruf supercharged? This may affect proper oil selection & I would think Ruf Dallas should know."
Your 996 Turbo is metzger engine. 996 4S is M96, not nearly as strong as your Turbo cyls
A tuner or engine rebuilder or whomever can make whatever recommendation he wants regarding what oil is best for any engine he had a hand in modifying.
His mods, thus his engine, so to speak, and I would assume he would specify an oil that he believes is best for his engine given the mods to the engine and its intended use.
If I had such an engine I'd listen. I have owned mod'd engines in the past -- mod'd them myself in some cases -- and used the aftermarket parts (pistons/rings, cams, lifters, etc) supplier's recommendation for assembly procedures, assembly lube, break in oil and break in procedures and subsequent oil and oil change intervals.
However, it is my opinion this does not carry over to those of us that have stock engines. In my opinion only Porsche is qualified to make a recommendation regarding which oils are ok to use in its engines.
Sincerely,
Macster.