964 turbo 3.3 engine,which oil do you use and why??
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Dinodriver (07-01-2022)
12-24-2008 | 10:07 PM
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From: wind-swept heights...
With all this talk about oil, some of you mentioned Mobil one. Mobil one has been used on my 930 essentially since birth, however, I am going to change to either a 50/50 blend of Mobil 1 20w50 and V-Twin, or, more probably, Valvoline NSL Racing 20w50. The latter is supposidly available at NAPA, I will be checking in the coming weeks as I am due for my yearly oil change in Feb (with a whopping 1,000 miles). I am switching to Valvoline because Mobil 1 lowered the levels of ZDP (Zinc & Phosphorus) due to emissions standards and potential catalytic converter problems. However, according to LN Engineering, this lower level of Zn/P is detrimental to older, air-cooled engines. Valvoline, in response, has created their "Not Street Legal" synthetic "racing" oil, which has the recommended 0.12% ZDP level, and apparently gets away with this by labeling it "not street legal" with the disclaimer that potential catalytic converter damage may occur. Of course, I would rather replace a cat than a 930 engine, and even more, my Euro spec 930 doesn't even have a cat.
See this release from Valvoline:
http://www.valvoline.com/downloads/2008-003a.pdf
Then see the ZDP concentration in their NSL Racing oil:
http://www.valvoline.com/products/Sp...ing%20Oils.pdf
For those of you sold on Mobil 0w40 because Porsche says so, or because it's what everyone does, from what I have read, putting 0w in our cars, specifically the older air cooled engines, is not the way to go. While on the "recommended" Porsche list, which the Mobil 0w40 lists on it's packaging, apparently that's more for the newer Porsches. According to LN Engineering, 0w is not the way to go. Our air cooled engines run hotter than the newer water cooled, and the 0w apparently ends up thinning out too much.
http://www.lnengineering.com/oil.html#Z19
See this release from Valvoline:
http://www.valvoline.com/downloads/2008-003a.pdf
Then see the ZDP concentration in their NSL Racing oil:
http://www.valvoline.com/products/Sp...ing%20Oils.pdf
For those of you sold on Mobil 0w40 because Porsche says so, or because it's what everyone does, from what I have read, putting 0w in our cars, specifically the older air cooled engines, is not the way to go. While on the "recommended" Porsche list, which the Mobil 0w40 lists on it's packaging, apparently that's more for the newer Porsches. According to LN Engineering, 0w is not the way to go. Our air cooled engines run hotter than the newer water cooled, and the 0w apparently ends up thinning out too much.
http://www.lnengineering.com/oil.html#Z19
What oil should I use in my newer Porsche requiring a "Porsche approved" oil, like the M96 engine?
We do not recommend use of most of the Porsche "approved" oils in any aircooled engine, including the 84 and later engines up to and including the 993 that are recommended to run these approved oils.
In the search for a "Porsche approved" oil, a quick glance at various Porsche owners manuals for a Turbo and GT2 as late as 2004 showed a recommendation for an API SH or SJ motor oil, so my recommendation is to find an approved oil with at least an API SL rating - an API SH or SJ would be even better. Additionally, try to use a 5w40 rather than a 0w40, as the viscosity with the narrower spread will have a higher high temperature high shear viscosity and should protect critical engine parts better at the upper limits. You do not need a 0w over a 5w until cold start temperatures are under -25C. Do not run any 30wt oil in your Porsche, aircooled engines included!
Coupled with Google and armed with the "overview of engine oils approved by Porsche "Porsche approval list", including some oils that no longer have Porsche approval but were approved at some point, here are some suggestions for oils. Remember, we're looking for an API, SH, SJ, or at worse case, SL rating AND meeting the ACEA A3/B3 specification. Remember, the earlier the API specification, the more likely the oil will be to have higher anti-wear additives.
Possible choices for Porsche-approved lubricants readily available in the US that are still API SL rated as of July 2008 are Kendall GT-1 5w40 Full Synthetic and Castrol Syntec 5w40; both oils have similar flashpoints to Mobil 1 and have higher HTHS viscosities than M1 0w40 because of their being 5w40 oils. There are other approved oils made by other European lubricant manufacturers that are of excellent quality, but can't be found at your FLAPS like the two listed above.
Shown below are some alternative suggestions for 5w40 viscosity oils that are not necessarily Porsche Approved, but are of excellent quality nonetheless. I have noted some of these oils meet Volkswagen's 505.01 specification for PD TDI engines, which is very rigorous and in my opinion, is a standard requiring additional protection so much so that Mobil formulated a special version of 5w40 in an API SJ that is specific to the 505.01 standard. If cost was no object and I was out of the warranty period, Motul 300V, Redline, or even Amsoil would be two obvious choices.
We do not recommend use of most of the Porsche "approved" oils in any aircooled engine, including the 84 and later engines up to and including the 993 that are recommended to run these approved oils.
In the search for a "Porsche approved" oil, a quick glance at various Porsche owners manuals for a Turbo and GT2 as late as 2004 showed a recommendation for an API SH or SJ motor oil, so my recommendation is to find an approved oil with at least an API SL rating - an API SH or SJ would be even better. Additionally, try to use a 5w40 rather than a 0w40, as the viscosity with the narrower spread will have a higher high temperature high shear viscosity and should protect critical engine parts better at the upper limits. You do not need a 0w over a 5w until cold start temperatures are under -25C. Do not run any 30wt oil in your Porsche, aircooled engines included!
Coupled with Google and armed with the "overview of engine oils approved by Porsche "Porsche approval list", including some oils that no longer have Porsche approval but were approved at some point, here are some suggestions for oils. Remember, we're looking for an API, SH, SJ, or at worse case, SL rating AND meeting the ACEA A3/B3 specification. Remember, the earlier the API specification, the more likely the oil will be to have higher anti-wear additives.
Possible choices for Porsche-approved lubricants readily available in the US that are still API SL rated as of July 2008 are Kendall GT-1 5w40 Full Synthetic and Castrol Syntec 5w40; both oils have similar flashpoints to Mobil 1 and have higher HTHS viscosities than M1 0w40 because of their being 5w40 oils. There are other approved oils made by other European lubricant manufacturers that are of excellent quality, but can't be found at your FLAPS like the two listed above.
Shown below are some alternative suggestions for 5w40 viscosity oils that are not necessarily Porsche Approved, but are of excellent quality nonetheless. I have noted some of these oils meet Volkswagen's 505.01 specification for PD TDI engines, which is very rigorous and in my opinion, is a standard requiring additional protection so much so that Mobil formulated a special version of 5w40 in an API SJ that is specific to the 505.01 standard. If cost was no object and I was out of the warranty period, Motul 300V, Redline, or even Amsoil would be two obvious choices.
