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If you poke around the Mobil site you can find info.

When I did last year the "standard" 0W-40 approved by Porsche had the identical API and ACEA specs as 15W-50 EP. I also search the oil board and the EP stuff was getting good reviews.

http://www.mobiloil.com/USA-English/MotorO...nce_15W-50.aspx

From what I remember EP had more SuperSyn, which is Mobil-speak for additives and that is why it cost a bit more.

And you are right. Mobil does not claim 20,000 mile oil change intervals, but Porsche does. But then with Porsche it use to be 15,000 miles. I suspect it is just Porsche marketing. Buy a BMW and you get free service for X years. Not so with Porsche, but Porsche can claim that the oil can go 20,000 miles.

And if you get caught taking more pictures at Wal-Mart just tell security I do the same.

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Tool Pants:

Thanks, I found the answer after poking around on the Mobil1 web site.

50% more SuperSyn.

http://www.mobiloil.com/USA-English/MotorO...FAQs.aspx#FAQs1

Next I'm going to attack some filters. It looks like from your pictures that the WIX filter has fewer pleating than the others. How does the amount and type of filter material affect performance? I would think the more the better. Back to Wal Mart, I hope they don’t mind if I cut a couple of Filters open. :D

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Before the Wix filter was put in I had my office assistant count the number of pleats for the 3 oil filters shown in message #2. Then I did it and had her do it again, just to make sure. Somewhere I have the numbers written on a piece of paper if you want them.

The number of pleats is a rule of thumb. You also need to factor in the quality of the filter media. Wix publishes their specs on their site and it looked good to me, 28 microns. I was never able to find specs for the other 2 filters shown in message #2.

At the end of the day I had a Wix oil filter with known specs that was good, and other oil filters with no know specs. I had EP 15W-50 oil that met the Porsche approved specs for 0W-40, except for the weight.

So I did what I wanted to do. The EP oil and Wix filter cost me a little bit more than what Porsche says to use, so I was not trying to save money.

That is why I called this thread unapprove.

post-4-1174162984_thumb.jpg

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Tool Pants:

I was planning to also run some test on the other filters, since WIX is the only one with published specs. So I have modified my coffee maker to take P filters and will see what comes out. :lol:

post-16679-1174232385_thumb.jpg

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Tool Pants:

Thanks, I found the answer after poking around on the Mobil1 web site.

50% more SuperSyn.

http://www.mobiloil.com/USA-English/MotorO...FAQs.aspx#FAQs1

The following is from a similar discussion over on the Rennlist.com:

>>I received a couple of responses on this, characteristic of which was

this one from Steve Weiner at RennSport Systems. Since he replied to

the public Racing list, I'm cross-posting his response here so you can

also benefit from his input:

-=-=-=-=-=-=-included bit-=-=-=-=-

Be very careful about what you are buying; you do NOT want the Mobil 1,

SM-rated 15w-50 stuff. That stuff lacks sufficient ZDDP to protect your

motor.

Mobil has reformulated this product and has released a non EP 15w-50

and

its undergoing testing to see what its ZDDP content is. Once thats

done,

I'll post that here.

Oils have truly changed over the past 2 years. All the formulations

have

been reconstituted to reduce ZDDP content to comply with the EPA laws

that require extended cat life. This is NOT good for Porsche (or any

other) engines over the long term and what was once OK, isn't anymore.

Once things have settled a bit, I'll put some specific oil

recommendations on my website.

-=-=-=-=-=-=-end included bit-=-=-=- <<

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Why was Castrol 5W-50 taken off the Porsche approved list?

The only "Engine Oils Approved By Porsche" that is 50W is Mobil1 5W 50, and they do not make it anymore.

Who knows why they took off all the other 50W oils, including Mobil1 15W 50. Maybe they think 50W is to viscous, and belongs on pancakes, not engines. But I like 15W 50, by the way. TP do you have any answers?

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Tool Pants:

Thanks, I found the answer after poking around on the Mobil1 web site.

50% more SuperSyn.

http://www.mobiloil.com/USA-English/MotorO...FAQs.aspx#FAQs1

The following is from a similar discussion over on the Rennlist.com:

>>I received a couple of responses on this, characteristic of which was

this one from Steve Weiner at RennSport Systems. Since he replied to

the public Racing list, I'm cross-posting his response here so you can

also benefit from his input:

-=-=-=-=-=-=-included bit-=-=-=-=-

Be very careful about what you are buying; you do NOT want the Mobil 1,

SM-rated 15w-50 stuff. That stuff lacks sufficient ZDDP to protect your

motor.

Mobil has reformulated this product and has released a non EP 15w-50

and

its undergoing testing to see what its ZDDP content is. Once thats

done,

I'll post that here.

Oils have truly changed over the past 2 years. All the formulations

have

been reconstituted to reduce ZDDP content to comply with the EPA laws

that require extended cat life. This is NOT good for Porsche (or any

other) engines over the long term and what was once OK, isn't anymore.

Once things have settled a bit, I'll put some specific oil

recommendations on my website.

-=-=-=-=-=-=-end included bit-=-=-=- <<

All Mobil1 oil is SM rated, Who knows how much ZDDP they put in it, but there are a lot of other Zinc compounds to chose from for a replacement, and other secret 11 herbs and spices. I’m not going to worry too much about it.

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Tool Pants:

Thanks, I found the answer after poking around on the Mobil1 web site.

50% more SuperSyn.

http://www.mobiloil.com/USA-English/MotorO...FAQs.aspx#FAQs1

The following is from a similar discussion over on the Rennlist.com:

>>I received a couple of responses on this, characteristic of which was

this one from Steve Weiner at RennSport Systems. Since he replied to

the public Racing list, I'm cross-posting his response here so you can

also benefit from his input:

-=-=-=-=-=-=-included bit-=-=-=-=-

Be very careful about what you are buying; you do NOT want the Mobil 1,

SM-rated 15w-50 stuff. That stuff lacks sufficient ZDDP to protect your

motor.

Mobil has reformulated this product and has released a non EP 15w-50

and

its undergoing testing to see what its ZDDP content is. Once thats

done,

I'll post that here.

Oils have truly changed over the past 2 years. All the formulations

have

been reconstituted to reduce ZDDP content to comply with the EPA laws

that require extended cat life. This is NOT good for Porsche (or any

other) engines over the long term and what was once OK, isn't anymore.

Once things have settled a bit, I'll put some specific oil

recommendations on my website.

-=-=-=-=-=-=-end included bit-=-=-=- <<

All Mobil1 oil is SM rated, Who knows how much ZDDP they put in it, but there are a lot of other Zinc compounds to chose from for a replacement, and other secret 11 herbs and spices. I’m not going to worry too much about it.

You also might want to check out http://www.api.org/certifications/engineoi...lable(CJ-4).pdf

just FYI

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  • 2 months later...

Based on everything that I have read here, I have one question:

Does the latest "Oils approved by Porsche" Bulletin superceed the Owner's Manual Recommendations? The reason I ask is because in my owner's manual, 15 W50 oil is recommended for temperatures higher than 50 degrees. Which is what we have here in FL.

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  • Admin
Based on everything that I have read here, I have one question:

Does the latest "Oils approved by Porsche" Bulletin superceed the Owner's Manual Recommendations? The reason I ask is because in my owner's manual, 15 W50 oil is recommended for temperatures higher than 50 degrees. Which is what we have here in FL.

Yes, the TSBs get updated and your owners manual does not.
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  • 10 months later...

It seems that the post copied over from rennlist is incorrect as far as ZDDP is concerned. Mobil 1 15W-50 has 1200 ppm phosphorous (which is how they measure ZDDP). That is 20% more than what's in the recommended Mobil 1 0W-40!

The last couple of oil changes I did half/half Mobil 1 0W-40 / 15W-50 (non-EP), about every 8-10K miles. I am in Houston and track the car quite a bit (high temp / high shear is important to me), so my next oil change will be Mobil 1 15W-50 EP all the way.

It seems ExxonMobil is picking up on the chatter about phsphorous. Here's a chart I downloaded from their site: http://www.mobiloil.com/USA-English/MotorO...oduct_Guide.pdf

Curious to see what others are doing.

Joost

:renntech:

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well done Toolpants. This thread was fun to read.

Has anybody ever sent a sample of their used oil out for analysis? Where I work, we send out samples to our oil supplier on a monthly basis for analysis. They have a running history of the "life" of the oil and make recomendations as to when we should then change it based on contaminents they detect. We've been able to extend our oil changes in some equipment by 3 or 4 times the mfg. recommended change by utilizing oil analysis.

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