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944s oil

my car came with no manual . what is the correct motor oil for a 87 944s

Old 10-18-2007, 06:25 PM
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the one you like. that said, 10W40. YMMV.
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Old 10-18-2007, 06:28 PM
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Or Mobil1 0W40 for cold weather. I like the mobil1 5W40 turbo diesel oil, mostly because it still complies with the old API SL spec instead of the newer SM spec.

It's kind of a long story, but there was a thread a while ago questioning the issue of SL vs SM, since the SM specified a drastic reduction in phosphorous based anti wear additives in the oil to make it more environment friendly. Several people were concerned that the hydraulic lifter design used in older cars, including the 944 lifters, needs those anti wear additives to be properly protected. I have no idea what's really the case, or whether the oil manufacturers have made a substitute non-phosphorous based additive that does the same thing, but I know diesel engines operate on much higher bearing loads and temperatures, and require the higher % of anti wear additives to last a long time (every diesel oil I've seen is SL, and just about every new car oil, except for mobil1 high mileage, is SM). The Mobil1 turbo diesel oil is advertised as being extra resistant to thermal breakdown, has top notch high pressure film strength, diesel grade antiwear additives, and also has the API CI-4 spec only found on heavy duty diesel oils. The standard diesel CF spec can be found on just about any half way decent oil, but the CI-4 is only found on the high grade heavy duty diesel oils.

Being uncertain about this issue, and being able to feel good about the fact that mobil1 turbo diesel oil is probably more than enough for anything a 944 motor could demand from an oil, that is what I use. And being a high quality oil, I let it go for 5000 mi. between changes, and it holds up really well. It could probably go longer, but I'd rather change oil than worry about learning how to replace bearings down the road. I know that several pelican members use the synthetic Rotella diesel oil as well, and is also a very good choice.

Edit: I should also add that the Mobil1 Turbo diesel oil is readily available at any Walmart for less that regular Mobil1 costs at the auto store. I don't have to worry about hunting down/special ordering some fancy performance oil.
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Last edited by HondaDustR; 10-20-2007 at 05:34 PM..
Old 10-18-2007, 08:59 PM
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I'm running Mobil 1 15W - 50
Old 10-19-2007, 04:09 AM
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Do a search on this board. Quite a while back (within a year) someone posted a very good post on oil and what the viscosity means.

The oil that you uses is not specific for your 87 944s is more related to your climate. This article had some really great tips regarding multi-grade oil and how vastly different multi-grade synthetic is from regular oil.

Vern
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Old 10-19-2007, 09:50 AM
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I'd recommend Brad Penn 10W30.
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Old 10-19-2007, 01:46 PM
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ah... another oil debate. well, i was going to try and avoid this, but here is my .02:

10/40 amsoil. i let it go for 9000 miles (they claim 12500) and change the oil filter every 3000 miles with the proper mahle filter.
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Old 10-19-2007, 02:44 PM
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for my 87 44S i use 20/50 during summer and 10/40 for winter.
Old 10-19-2007, 08:16 PM
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Quote:
Originally Posted by martin944 View Post
for my 87 44S i use 20/50 during summer and 10/40 for winter.
Ooh..a 944S in Germantown (drools...)?! I'll have to keep my eyes peeled. I drive to Damascus 5 times a week.
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Old 10-20-2007, 05:36 PM
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Quote:
Originally Posted by HondaDustR View Post
Ooh..a 944S in Germantown (drools...)?! I'll have to keep my eyes peeled. I drive to Damascus 5 times a week.
Old 10-29-2007, 08:49 AM
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there really is only one mobile1 that's porsche-approved: 0w40

read this thread;
Oil viscosity question- rebuilt engine
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Old 10-29-2007, 10:15 AM
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Shell Rotella T Synthetic 5/40 diesel oil. Been running it for over 100k miles.
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Old 10-29-2007, 11:11 AM
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I only use cold pressed extra virgin olive oil, italian if i can find it but greek isn't bad either
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Old 10-29-2007, 02:30 PM
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you could probably run the car just fine on 100% vegetable oil for 100k miles, or even billy joe-bob's super sekret wonder oil. it doesn't prove it's any good, though.
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Old 10-29-2007, 02:32 PM
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Quote:
Originally Posted by nize View Post
you could probably run the car just fine on 100% vegetable oil for 100k miles, or even billy joe-bob's super sekret wonder oil. it doesn't prove it's any good, though.
Well, the car has 190k on it, uses no oil, leaks no oil, runs like a top, and has great compression. I think the Rotella is great!

Just because Mobil 1 is a great oil, does not mean it is the only great oil.
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Old 10-29-2007, 03:09 PM
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Quote:
Originally Posted by sasquatch View Post
Well, the car has 190k on it, uses no oil, leaks no oil, runs like a top, and has great compression. I think the Rotella is great!

Just because Mobil 1 is a great oil, does not mean it is the only great oil.
porsche approved that is the only kind of oil you should run in your car. All oils that are porsche approved will say so on the back in small print.
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Old 10-29-2007, 03:25 PM
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i've tried the porsche approved but found that after draining it from the car it gives my red leaf lettuce a bitter taste
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Old 10-29-2007, 03:39 PM
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Quote:
Originally Posted by myskyon View Post
porsche approved that is the only kind of oil you should run in your car. All oils that are porsche approved will say so on the back in small print.
I got some mountain land in Florida for sale. Interested? Like I said before, 100 of the 190k on the car has been on Rotella. Tell me how it is not a fantastic oil?

"Porsche Approved" means that Mobil 1 was the one of the many oils that met Porsche's specs, but edged out the competition by giving more kickbacks/advertising/race sponsorship to Porsche, not that it was the best.
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Old 10-29-2007, 03:47 PM
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Quote:
Originally Posted by callmethewander View Post
I only use cold pressed extra virgin olive oil, italian if i can find it but greek isn't bad either
My wife found out that if she added a hint of garlic to the EVOO, the smell had me very hungry by the time I got home.
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Old 10-29-2007, 03:49 PM
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Haha, Now We're Talkin Oil!

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Old 10-29-2007, 03:54 PM
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