Another oil question
#17
Three Wheelin'
#19
RL Community Team
Rennlist Member
Rennlist Member
For a 993 oil with slightly higher Phosphorus level has the property of reducing scuffing on the valve mechanism. Recently most oils have reduced this component in their oils to extend CAT life. When the 993 was built it used the earlier oils with higher content.
Here are oils with the higher content from the Mobil 1 web site:
Mobil 1 0w-40, 5w-30, 15w-50,
They also have some oils with very high Phosphorus levels for racing and motorcycles; these would be hard on the CATs in your car.
My experience is that I have never had an oil related engine failure.
With 993s when starting in cold weather using a heavier grade of oil will cause the delicate hydraulic lifter seals to fail and cause the dreaded valve adjuster clacking. I would use a lighter grade oil in winter to avoid this and a heavier grade in summer to keep the oil pressure up.
Enjoy your car!
Andy
Here are oils with the higher content from the Mobil 1 web site:
Mobil 1 0w-40, 5w-30, 15w-50,
They also have some oils with very high Phosphorus levels for racing and motorcycles; these would be hard on the CATs in your car.
My experience is that I have never had an oil related engine failure.
With 993s when starting in cold weather using a heavier grade of oil will cause the delicate hydraulic lifter seals to fail and cause the dreaded valve adjuster clacking. I would use a lighter grade oil in winter to avoid this and a heavier grade in summer to keep the oil pressure up.
Enjoy your car!
Andy
#20
Burning Brakes
Mobil 1 15w-50 here. Recommended by a respected used Porsche dealer with a long history including racing (Holt). That's good enough for me and you can find it at Walmart for reasonable in 5 quart size.
#21
Addicted Specialist
Rennlist Member
Rennlist Member
I switched from Mobil1 15w/50 to Mobil1's TDT 5w/40 just because of all that I had read regarding the weight of the oil where "thinner" does the job that "thicker" will do, but better (gross oversimplification, I know. But I dont want to rehash that again). The TDT 5/40 has very nearly all the positives of the 15/50 but at a lighter weight ...better for daily street use.
FWIW, I use the Brad Penn for the Trackmeister (82 SC), as it is very highly recommended by those "in the know." The reason I choose not to go with the BP in the 993 is I don't want to risk compromising cat life (pricey!!), whereas the M1 TDT oil offers good ZDDP numbers for health and longevity.
Add to all the above with the fact that M1 is easy to get and reasonably priced. In concert with prudent oil/filter changes, I think my engine will be happy for some time.
Edward
FWIW, I use the Brad Penn for the Trackmeister (82 SC), as it is very highly recommended by those "in the know." The reason I choose not to go with the BP in the 993 is I don't want to risk compromising cat life (pricey!!), whereas the M1 TDT oil offers good ZDDP numbers for health and longevity.
Add to all the above with the fact that M1 is easy to get and reasonably priced. In concert with prudent oil/filter changes, I think my engine will be happy for some time.
Edward
#22
Instructor
Join Date: Aug 2008
Location: Colorado, USA
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I know there are a million threads on this, but I read lots of discrepancies in information. This is my first oil change with my Porsche so I want to make sure I start out on the right track.
I have read a lot about the Mobil 1 Truck oil, but then I just found an article saying NOT to get it since it was reformulated in 2008...
I am trying to decide between:
Total Quartz 9000 5W-40 @$5.00/quart (Porsche approved... but for what?)
Mobil 1 Turbo Diesel Truck (5W-40) @$4.40/quart
I would also have Mobil 1 0W-40 European on here but my local Wal-Marts don't stock the 5 quart jugs.
Am I being way too **** about this or is there really an appreciable difference between these oils? Any feedback would be appreciated.
Thank you!
I have read a lot about the Mobil 1 Truck oil, but then I just found an article saying NOT to get it since it was reformulated in 2008...
I am trying to decide between:
Total Quartz 9000 5W-40 @$5.00/quart (Porsche approved... but for what?)
Mobil 1 Turbo Diesel Truck (5W-40) @$4.40/quart
I would also have Mobil 1 0W-40 European on here but my local Wal-Marts don't stock the 5 quart jugs.
Am I being way too **** about this or is there really an appreciable difference between these oils? Any feedback would be appreciated.
Thank you!
Here is a good (if long!) article from LN Engineering talking all about engine oil for air-cooled Porsches:
http://www.lnengineering.com/oil.html
Don't cheap on the oil , it's the life blood of our cars!
#23
a) read your Porsche manual, and look at Rennlist for the nice pictures and increase your Rennlist post score by participating in what is your favourite Porsche color poll; or
b) read Rennlist for some very practically informed advice.
Tough choice but I went with b). This is Rennlist at its most valuable, to give a person with no mechanical and industry knowledge some very informed views. I much appreciate Charles' and Steve's advice. Unfortunately I cannot get these brands in Hong Kong, and thanks to Charles' kind recommendation I am very happily using Motul 300V 15W-50.
Happy driving,