0W 40 or 20W 50 for a 1986 Porsche 944 Turbo

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Don't you think Porsche knows it engines best, and is making a proper recommendation according to their testing? Do what they recommend.....

M1 0w40.....I don't think you can go wrong.
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Offensive pseudo signature removed.
 
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Originally Posted By: Oregoonian
Don't you think Porsche knows it engines best, and is making a proper recommendation according to their testing? Do what they recommend.....

M1 0w40.....I don't think you can go wrong.
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Opinions are like asses...everyone has one...but some stink!


I didn't know they made 0w-40 in 1986.

Some of the things you read here are just beyond failed logic.

There should be a test or exam or something required before you're allowed to post.

For the record, Porsche recommended 15w-40 at the time, and the 15w-40 you get now is way better. PLEASE tell us why if it worked then, why it would not work now. Is there some sort of relativistic time-warp effect I'm unaware of???

Unreal. Like I've said many times, more reading and less posting is the solution to 95% of the garbage posts here.
 
Originally Posted By: Audi Junkie
Originally Posted By: Oregoonian
Don't you think Porsche knows it engines best, and is making a proper recommendation according to their testing? Do what they recommend.....

M1 0w40.....I don't think you can go wrong.
_____________________________________________


I didn't know they made 0w-40 in 1986.

Some of the things you read here are just beyond failed logic.

There should be a test or exam or something required before you're allowed to post.

For the record, Porsche recommended 15w-40 at the time, and the 15w-40 you get now is way better. PLEASE tell us why if it worked then, why it would not work now. Is there some sort of relativistic time-warp effect I'm unaware of???

Unreal. Like I've said many times, more reading and less posting is the solution to 95% of the garbage posts here.


Read the original post (pg.1). Porsche now recommends 0w40 for ALL its vehicles (per the poster),including all the older models (From 1984 on). His is a 1986.

ALL.....MEANS ALL!

Go for the M1 0w40....
 
It doesn't mean to the exclusion of other oil nor does it mean it will work best. It simply means 0w-40 is now INCLUDED with the other recommended viscs.

What is the use of a 0w synthetic in the Arizona desert anyway? To maximise cost and consumption?

Since your original post was directed at another member, intending to exclude the validity of the suggestions, tell us why won't 15w-40 work or is less than ideal.
 
Originally Posted By: Audi Junkie
It doesn't mean to the exclusion of other oil nor does it mean it will work best. It simply means 0w-40 is now INCLUDED with the other recommended viscs.

What is the use of a 0w synthetic in the Arizona desert anyway? To maximise cost and consumption?

Since your original post was directed at another member, intending to exclude the validity of the suggestions, tell us why won't 15w-40 work or is less than ideal.


http://www.azdot.gov/CCPartnerships/KnowSnow/Index.asp
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As much as I never agree with Audi Junkie, I agree 100% here. I'm basing my comments on an old Quaker State Lubricants Guide covering from about 1986-1996 IIRC. I think I still have it actually. They listed every weight of oil under the sun, but it was blatantly obvious that the main oil for "all temperatures" was a 15W-50 (a weight which Quaker didn't make). Porsche can say whatever they want, but the old 944's were air-cooled unlike the newer generations. I personally changed the oil on my then boss' Porche (911), and they always wanted 15W-50 or a thicker conventional. Personally, I wouldn't use 0W-40 in Buffalo, NY much less in Arizona. I doubt it would be a problem, but those cars spec'd thicker oil and that's what I would use...
 
Last edited:
Originally Posted By: Oregoonian
Originally Posted By: Audi Junkie
Originally Posted By: Oregoonian
Don't you think Porsche knows it engines best, and is making a proper recommendation according to their testing? Do what they recommend.....

M1 0w40.....I don't think you can go wrong.
_____________________________________________


I didn't know they made 0w-40 in 1986.

Some of the things you read here are just beyond failed logic.

There should be a test or exam or something required before you're allowed to post.

For the record, Porsche recommended 15w-40 at the time, and the 15w-40 you get now is way better. PLEASE tell us why if it worked then, why it would not work now. Is there some sort of relativistic time-warp effect I'm unaware of???

Unreal. Like I've said many times, more reading and less posting is the solution to 95% of the garbage posts here.


Read the original post (pg.1). Porsche now recommends 0w40 for ALL its vehicles (per the poster),including all the older models (From 1984 on). His is a 1986.

ALL.....MEANS ALL!

Go for the M1 0w40....


You do realize their dealers get like $200 per oil change, right?
 
There's some real slavish obsequience to Mobil products by some in here. Lots of people seem to be won over by ponytail'd marketing dept jargon. If I'm going to drive my flat tappet motor in traffic or on the track, I want oil pressure and viscosity to protect my motor. Not a brochure. All this [censored] about a Dino oil that might be a 20w/50 breaking down before a synthetic 0W/40 is, well, [censored]! OOH but oil is for cooling...yes, sure that's part of it's purpose but if I'm going to be driving in extreme circumstances such as high temp city traffic or the track, I want an oil that is thick enough to protect my expensive metal parts from self destructing. The oil grade acts as a bearing, not just some slimy lubricant. Low visc. synthetic oils get really thin when hot and motors wear prematurely and expire. It's not Rocket Surgery!!
 
Originally Posted By: Nickdfresh
Porsche can say whatever they want, but the old 944's were air-cooled unlike the newer generations. I personally changed the oil on my then boss' Porche (911), and they always wanted 15W-50 or a thicker conventional. Personally, I wouldn't use 0W-40 in Buffalo, NY much less in Arizona. I doubt it would be a problem, but those cars spec'd thicker oil and that's what I would use...


944s were NEVER air cooled, come on. That's a pretty basic fact to get wrong when giving expert advice on choosing an oil for one.

After unsuccessfully shopping for a nice 951 (944 Turbo) I had a 968 for 5 years before my BITOG days. 968s are the evolution of the 944, with an NA 3.0L I4 with variable valve timing and variable induction geometry. I ran the M1 15W50 of the day, because everyone told me I needed it. In the "shoulder" seasons it was rediculously thick on startup. In late fall, I could start the car around freezing, shut it down and the oil pressure gauge would slowly fall over 5 seconds.

After running M1 0W40 for years in the BMW I had at the same time (and still have), and after reading Porsche's recommendation to use it in all model years I tried it in the last OCI before I sold the 968. It completely changed the character - quieter, less shaking and fighting the oil on cold startup, more power, only slightly lower hot idle oil pressure (1.5 bar)

If I knew then what I know now, I would probably run 15W40 HDEO dino (I didn't put on that many miles in a season) with UOAs to confirm things are OK. If I felt some need for syn on a summer-only NA car I'd run 5W40. If I tracked it regularly, then I might be looking at 50 weight syns. With a turbo I'd be on the fence about using a syn HDEO.

Bottom line, I think the 50 weight was too heavy for the street. The 968 and the 951 (which is the 944 Turbo) both have oil-to-air coolers as well. I would never put 20W50 in one. Remember, diesels which run HDEOs have turbos too. The other 944 variants have oil-to-coolant oil "coolers" if memory serves correctly.
 
Last edited:
Originally Posted By: Audi Junkie


What is the use of a 0w synthetic in the Arizona desert anyway? To maximise cost and consumption?


You should take a geography test before posting. Arizona has cities at 9,000 ft elevation that has mid 40 temperature in the summer. In the winter it is colder than you know where.
 
Originally Posted By: Audi Junkie
I've spent plenty of time with Porsche Club owners and crew. Nobody uses 0w oil on the track.


According to Doug Hillary they do and often. I have seen them used it at Road America and also here at PIR.
 
Originally Posted By: azsynthetic
Originally Posted By: Audi Junkie


What is the use of a 0w synthetic in the Arizona desert anyway? To maximise cost and consumption?


You should take a geography test before posting. Arizona has cities at 9,000 ft elevation that has mid 40 temperature in the summer. In the winter it is colder than you know where.


Originally Posted By: armydray13
Spring is coming up, and I'm planning on changing the oil in my 1986 Porsche 944 Turbo from its winter 15W 40 weight to its summer 20W 50 weight. 0W 40 sure seems awful light for my engine, especially since it was designed for a heavy-weight oil. Car has 83,000 miles and does not leak. What do you guys recommend?


So, now there's no deserts in Arizona?
crackmeup2.gif


He already uses 15w-40 in winter, and finds it suitable.

Another quality post.


Originally Posted By: azsynthetic
Originally Posted By: Audi Junkie
I've spent plenty of time with Porsche Club owners and crew. Nobody uses 0w oil on the track.


According to Doug Hillary they do and often. I have seen them used it at Road America and also here at PIR.


So, you have no you have no personal experience?

You should have just said so.
 
I have a modified 951 and would ONLY put in a 20w/50 or higher. Sure perhaps if I lived in Canada where it gets freezing then I'd look at something of lower viscosity but even the Manual recommends this weight down to -10c. If I was just pootling around in that sort of weather I'd go for something lighter than a 20w/50 but in general terms I don't mind sacrificing a very small percentage of fuel economy for the sake of protection.

I don't pay attention to what my compatriot Mr Hillary says. He has no experience to back it up compared to actual Mechanics and Engineers that work on our cars. Steve Weiner and Charles Navarro being amongst the highly qualified professionals who recommend otherwise to what the highly esteemed around here do.

In a warm climate that occasionally gets down to a frosty morning here in Australia we have seen the results of using a 0w or 5w oil. Highly premature wear and in track cars, spun bearings. It's a no brainer and amazes me how people can argue otherwise. Oh, and I use a dino 25w/60 for the track.
 
Originally Posted By: SHARKYTOOTH
I have a modified 951 and would ONLY put in a 20w/50 or higher. Sure perhaps if I lived in Canada where it gets freezing then I'd look at something of lower viscosity but even the Manual recommends this weight down to -10c. If I was just pootling around in that sort of weather I'd go for something lighter than a 20w/50 but in general terms I don't mind sacrificing a very small percentage of fuel economy for the sake of protection.

I don't pay attention to what my compatriot Mr Hillary says. He has no experience to back it up compared to actual Mechanics and Engineers that work on our cars. Steve Weiner and Charles Navarro being amongst the highly qualified professionals who recommend otherwise to what the highly esteemed around here do.

In a warm climate that occasionally gets down to a frosty morning here in Australia we have seen the results of using a 0w or 5w oil. Highly premature wear and in track cars, spun bearings. It's a no brainer and amazes me how people can argue otherwise. Oh, and I use a dino 25w/60 for the track.


Are the 0wXX and 5wXX oils they used Porsche approved?
 
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