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Old 07-08-2019, 07:30 PM   #1
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158k high mileage oil recommendations ?

Im probably gunna get crushed for asking an oil question as I am sure it has been discussed 1000 times. I admit from the get go that I am being a bit lazy and just looking for a quick answer.
New to me 2001 Box base with 158k on it. I know all of you guys are using Mobile 1 and previous owner told me I would be due for an oil change soon so I just plan on knocking it out asap. What I forgot to ask the previous owner was what grade Mobile 1 he has been using.
Sooooo I will ask u guys........what grade Mobile 1 should I use for my car w 158k on it and where do u guys usually purchase the oil filter/crush washer from?

Thanks

ps....if I topped off my oil with example: 10/30 M1 and there was 10/40 M1 in the car would it mess anything up? It would be a very small quantity. The reason i want to keep my oil level on the full mark is my IMS bearing seal was removed....so I need that bad boy to get wet.

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Old 07-08-2019, 09:34 PM   #2
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Factory oil weight is 0W40, but best to use your judgement given your climate and usage.

My Boxster is a spring/summer/fall vehicle only, and gets put away once the weather hits below double digits. I'm running 0W40 Lubro-Moly and will likely switch to Motul next season. You can get the filter and crush washer just about anywhere. Try Pelican Parts.
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Old 07-09-2019, 05:10 AM   #3
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Don't assume everyone is using Mobil 1 , many have learned there are much better oils available . Not going to get in an oil debate so I'll stop there . Pelican Parts is the sponsor of this website , they are good people and offer a wide variety of parts for Porsche vehicles . They are a good vendor to support . But you can buy local also if you want to support your local auto parts stores . Enjoy your new purchase .
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Old 07-09-2019, 05:26 AM   #4
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Don't assume everyone is using Mobil 1 , many have learned there are much better oils available . Not going to get in an oil debate so I'll stop there . Pelican Parts is the sponsor of this website , they are good people and offer a wide variety of parts for Porsche vehicles . They are a good vendor to support . But you can buy local also if you want to support your local auto parts stores . Enjoy your new purchase .
I used M1 for my first oil change. I read some articles about the declining efficacy of the product (not meeting certain standards/new formulation) and discontinued using it. I now run a major brand European formula, ~$24/5 quarts. And, run the WIX/NAPA Gold filter.

I'd run a full synthetic that meets the standards, checking the condition of your oil each change (check that filter, too). Don't get so caught up in brand names instead making sure the oil meets efficacy standards. Change it regularly.

Cheers!
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Old 07-09-2019, 05:48 AM   #5
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I've ditched 0w40 and have gone to 5w40 (Castrol, Liqui-Moly). Next change may go to 10w40 (which was one of the recommended synthetic weights in the manual in 2001).
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Old 07-09-2019, 09:09 AM   #6
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I admit from the get go that I am being a bit lazy and just looking for a quick answer. I know all of you guys are using Mobile 1
😂

Castrol for me
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Old 07-09-2019, 11:46 AM   #7
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Because of the climate here in Colorado, I use 0-40W M1.I have used Liquid Moly but can't tell the difference so I buy M1. I get oil filter--Hengst on Amazon
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Old 07-09-2019, 08:48 PM   #8
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Thanks for all the replies and for not crushing me for the lack of a thorough search. 5 or 6 replies and everyone is doing something a little different.

I have no idea what is in the car right now......can I assume that the left over oil in the car will mix ok with the new full synthetic that I choose? This car will be a Spring summer and fall car only and garaged for the winter. I will put very few miles per year...maybe 3 to 5k tops. I am leaning towards M1 mostly because I believe its what the previous owner was runnin'

again.....thanks for the replies!!!
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Old 07-09-2019, 09:29 PM   #9
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... I have no idea what is in the car right now......can I assume that the left over oil in the car will mix ok with the new full synthetic that I choose? ...
The residual oil left in the engine by a normal oil change will be fine mixing with the new oil. If you do top it off again later, you should use the same oil that you used in the oil change.

At 158k miles with no warranty concerns, Mixing brand "X" with brand "Y" to top it off should even be okay if you have to, but try to avoid mixing different oil grades beyond what was left behind when you changed the oil.

There's still a lot to be gained by reading some of the old "What is the best oil" threads. Informative and entertaining.

I have a few 986 Boxsters and have used Castrol Edge 10W-40, M1 0w-40 & 10W-40, and Shell Rotella T6 5W-40. Some companies change their additive formulation regularly without notice. Some companies all dip from the same general supplier's vat and put their label on it. I try not to stress myself over the choice.

...and if you love your car, really love it, flush the engine and use nothing but Joe Gibbs 'Driven' DT40. It actually is the best, but at 158k miles ...meh.
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Old 07-09-2019, 09:57 PM   #10
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And one more thing. Assuming you still have the stock filter and not a spin-on adapter, buy a new "Oil Filter Cover Cap". The bypass valves wear out over time and miles. The Genuine Porsche brand comes with a filter for just $21.50 at Pelican:

https://www.pelicanparts.com/More_Info/99610702055M100.htm?pn=996-107-020-55-M100&bt=Y&fs=0&SVSVSI=4391

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Old 07-10-2019, 03:06 AM   #11
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Porsche oil viscosity has evolved.....

....PORSCHE now recommends 5w-50 for the 986.

See here:

https://www.porsche.com/usa/accessoriesandservices/classic/genuineparts/producthighlights/motoroil/
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Old 07-10-2019, 04:09 AM   #12
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That's a vid about Porsche-developed oils for 356s and air-cooled 911s..
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Old 07-10-2019, 04:37 AM   #13
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And....

.....if you scroll down, you will see the new 5w-50 986/996 Porsche Classic oil.

Just scroll down.
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Old 07-10-2019, 04:42 AM   #14
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Ah...never forget to scroll, eh?
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Old 07-10-2019, 04:50 AM   #15
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Here...

https://www.********************************************** ******.com/product/SKU5W50OIL.html?gclid=EAIaIQobChMIvrCYoqSq4wIVFLbI Ch04eArAEAQYASABEgIXEPD_BwE


Well, that link isn’t working.

Just google Porsche Classic Motor Oil 5W-50.

Porsche changed their formula after seeing all the engine failures.

This just happened this year.
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Old 07-10-2019, 06:06 AM   #16
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More very good info.......You guys have given me a lot of homework. I just got it through Virginia inspection....finally legal. Now two door switches a starter and an oil change and I can relax.

Thanks for the replies........
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Old 07-10-2019, 07:07 AM   #17
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Since Porsche doesn't manufacture motor oil, what are the chances that this 5W50 'classic' oil is Mobil 1 5W50?
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Old 07-10-2019, 07:50 AM   #18
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Originally Posted by Box7774 View Post
More very good info.......You guys have given me a lot of homework. I just got it through Virginia inspection....finally legal. Now two door switches a starter and an oil change and I can relax.

Thanks for the replies........
RELAX, RELAX - it's a 986 with 156k - There will not be any relaxing, it's just the beginning

Doesn't mean you can't enjoy the ride

As far a motor oil. Drain while there is still some gold tint to it (Not dirty black), check the filter for materials. You can even drop the sump cover to get a better idea what stuff has worn away.
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Old 07-10-2019, 02:15 PM   #19
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.....if you scroll down, you will see the new 5w-50 986/996 Porsche Classic oil.

Just scroll down.
That is some expensive oil. About $80 for 5L.
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Old 07-10-2019, 02:30 PM   #20
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Well....

.....Oil is cheap.

Engines are expensive.

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