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Old 07-14-2017, 11:23 PM   #1
993James993
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Default What do you use for engine oil?

What are folks using for engine oil? I will soon need to change the oil on my '99 C2. For my earlier 911's I use Mobil 1 0W-40. Is that a good choice for the 3.4?

Thanks!
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Old 07-14-2017, 11:41 PM   #2
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I'm an idiot

wrong tread

@James - You'll get a lot of flak for asking this given how many threads already cover the topic. Spend 30 minutes reading a few threads & you'll get a good feel for what oil meets your intended use.
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Old 07-14-2017, 11:49 PM   #3
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My car came with fresh 0-40 Mobil 1. I left it there and swapped it for 5-50 for summer/track use only. You can keep using 0-40 unless you are really hot climates.
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Old 07-14-2017, 11:59 PM   #4
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Originally Posted by TonyTwoBags View Post
I'm an idiot

wrong tread

@James - You'll get a lot of flak for asking this given how many threads already cover the topic. Spend 30 minutes reading a few threads & you'll get a good feel for what oil meets your intended use.
Hey, I did a search and nothing much came up on the 996 forum. Go to the 993 forum if you love popcorn.

PS-Tony, my Fister D mufflers should ship next week. I got the ceramic coating.

Last edited by 993James993; 07-15-2017 at 01:20 AM.
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Old 07-15-2017, 12:02 AM   #5
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Originally Posted by murphyslaw1978 View Post
My car came with fresh 0-40 Mobil 1. I left it there and swapped it for 5-50 for summer/track use only. You can keep using 0-40 unless you are really hot climates.
I live in a really hot climate. 118 degrees a couple of weeks ago.
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Old 07-15-2017, 12:26 AM   #6
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I'm running Castrol Syntec 5w40 and will probably stick with it
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Old 07-15-2017, 12:27 AM   #7
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Motul x-cess 5w40.
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Old 07-15-2017, 01:45 AM   #8
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s
Quote:
Originally Posted by 993James993 View Post
Hey, I did a search and nothing much came up on the 996 forum. Go to the 993 forum if you love popcorn.

PS-Tony, my Fister D mufflers should ship next week. I got the ceramic coating.
Nice work, I'm excited to be done with exhaust mods .

I use DT40 and have used Mobil 1 0w40 before learning about the engine's propensity to devour oil that doesn't have good resistance to sustained, elevated temps. Switching to Motul 8100 Excess reduced oil consumption for me and now on DT40 I barely went through a quart in the last 3,000 miles. So I'm staying on DT40. Other guys run Motul with success & others have 100+ k miles on Mobil 1. Royal Purple is another one some guys use.

The wet sump system in the m96 isn't the best for high-performance driving, particularly on the track. So 996s are more susceptible to loss of viscosity from running at high temps.

A good DIY you could do is figure out what temps your car runs at (oil & coolant) with your normal use. Then select an oil that works well at that temp + a dozen or two degrees for margin of safety. The inadequacies of the m96 wet sump manifest in localized hot zones, particularly in bank 2 (pax side). So there's a long list of failed m96 engines thanks to bank 2 weaknesses.

Mk1s your main risk is cracked heads, whereas mk2s are more susceptible to cylinders being compromised. From my perspective, a 10-20k+ engine is worth $100 oil. And I drive my car a lot, with 2-4 oil changes per year so far.

Keep on combing through the old threads & you'll find more information to incorporate into your decision making. There's a good Blackstone oil analysis thread that you can participate in to understand what level of metals are running through your engine. If you're running clean oil I think you're in good shape (assuming you don't decide to run the 996 in an endurance race at a track).
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Old 07-15-2017, 06:50 AM   #9
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Quote:
Originally Posted by Chris(MA) View Post
I'm running Castrol Syntec 5w40 and will probably stick with it


That's my choice as well for a few tears now.
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Old 07-15-2017, 06:53 AM   #10
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Sorry years not tears.
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Old 07-15-2017, 09:30 AM   #11
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Started running DT40 almost 20,000 miles ago, and now at 166,000 my mild oil consumption (about a quart every 3,000 miles or so) has actually decreased. Oil analysis reports look good, and car runs great.

(You're getting off easy here! When I saw the thread title I thought you would get way more abuse! I've had trouble searching for things in old threads, but oil "discussions" shouldn't be too hard to find.)
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Old 07-15-2017, 10:38 AM   #12
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Thanks!

5W-50, change interval 5000 miles/12 months, Blackstone analysis every change.

Appreciate everyone's input!
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Old 07-15-2017, 11:00 AM   #13
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Walmart now sells Pennzoil Platinum Euro 0w40 for $25 for 5 quart bottle. It is Porsche approved and only $2 more per 5 quarts than the mobil 1 0w40 for those of you with mobil 1 derangement syndrome and want a reasonably priced alternative
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Old 07-15-2017, 12:01 PM   #14
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Quote:
Originally Posted by Barn996 View Post
Sorry years not tears.
good correction, the last thing we need on this forum is more tears
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Old 07-15-2017, 03:08 PM   #15
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I would never use Pennzoil, or Royal Purple, since I've had my 996 (5 months ), I've used mobil 1 0w40, but might switch to Amsoil 5w40 next change. Amsoil is the only oil i used in my previous car , a track prepped Sti.
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