05-19-2014, 07:16 AM
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#1
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Registered User
Join Date: May 2014
Location: Denver
Posts: 2
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Oil for a Boxster S
My mechanic put Mobil 0 40 in my Boxster. Previously he had used Mobile 10 W 30.
When car is at operating temperature, I hear a new rattling noise from my exhaust. When clutch is depressed, noise goes away. Is the cause of the noise the weight of the oil or do I have other problems?
Thanks
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05-19-2014, 07:41 AM
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#2
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Registered User
Join Date: Aug 2009
Posts: 1,466
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You previously had the wrong oil in the motor. 0-40 or 5-40 recomended. Your noise is most likely not in the motor but could be heat shield, clutch, or transmission.
__________________
2003 Black 986. modified for Advanced level HPDE and open track days.
* 3.6L LN block, 06 heads, Carrillo H rods, IDP with 987 intake, Oil mods, LN IMS. * Spec II Clutch, 3.2L S Spec P-P FW. * D2 shocks, GT3 arms & and links, Spacers front and rear * Weight reduced, No carpet, AC deleted, Remote PS pump, PS pump deleted. Recaro Pole position seats, Brey crouse ext. 5 point harness, NHP sport exhaust
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05-19-2014, 09:15 AM
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#3
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I am my own mechanic....
Join Date: Feb 2013
Location: Salt Lake City, UT
Posts: 3,432
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I can't believe what I'm reading. Dude went there with the oil question, and got a straight answer! Not the "use the search feature" reply! That's cool. (Just an observation...and kidding)
I have a rattle too. Clutch time. Goes away with clutch in.
__________________
'04 Boxster S 50 Jahre 550 Spyder Anniversary Special Edition, 851 of 1953, 6-sp, IMS/RMS, GT Metallic silver, cocoa brown leather SOLD to member Broken Linkage.
'08 VW Touareg T-3 wife's car
'13 F150 Super Crew long bed 4x4 w/ Ego Boost
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05-19-2014, 09:52 AM
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#4
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Engine Surgeon
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
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Does your Boxster have an aftermarket, single mass flywheel installed?
__________________
Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
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05-19-2014, 06:51 PM
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#5
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Registered User
Join Date: Sep 2008
Location: Florida
Posts: 2,498
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Pretty ballsie to go straight to the oil question in a first post!
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05-19-2014, 07:53 PM
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#6
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On the slippery slope
Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,797
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Quote:
Originally Posted by dghii
Pretty ballsie to go straight to the oil question in a first post!
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nah, just a simple question that got a simple answer.
__________________
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
2004 996 Targa Tip
Instructor - San Diego region
2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
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05-19-2014, 07:57 PM
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#7
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I am my own mechanic....
Join Date: Feb 2013
Location: Salt Lake City, UT
Posts: 3,432
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Quote:
Originally Posted by dghii
Pretty ballsie to go straight to the oil question in a first post!
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Better than "what's this bullet shaped thing with wires in my passenger side grill??".
Or
"Which tires are best?"
__________________
'04 Boxster S 50 Jahre 550 Spyder Anniversary Special Edition, 851 of 1953, 6-sp, IMS/RMS, GT Metallic silver, cocoa brown leather SOLD to member Broken Linkage.
'08 VW Touareg T-3 wife's car
'13 F150 Super Crew long bed 4x4 w/ Ego Boost
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05-20-2014, 02:24 PM
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#8
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Registered User
Join Date: Jul 2013
Location: Maryland
Posts: 189
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Bought my car with 47,xxx miles on it. Had the rattle issue you describe. Had the car for about 4 days and drove it 50 miles or so before I put it on a tow truck and sent to my indy shop for IMS, Clutch and Oil change. Car was towed due to distance of shop. Picked car up, rattle remains to this day (work was done in August). If you depress the clutch and let it out slowly (still in neutral) the noise should not be there. It only occurs on quick neutral releases. Not sure what it is and my indy shop couldnt give me a direct answer either. They say it is common.
__________________
2001 Boxster S - Triple Black -
Billy Boat Muffler
ROW M030 Suspension
LNE IMSB
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05-20-2014, 03:16 PM
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#9
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Registered User
Join Date: Dec 2010
Location: Seattle
Posts: 9
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Slightly off topic, but Castrol Edge 0W40, 5 qt is now available at Walmart for the same price ($25.17) as Mobil 1 0W40, 5 qt.
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05-21-2014, 08:26 AM
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#10
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Gone
Join Date: Feb 2014
Location: NV
Posts: 249
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Quote:
Originally Posted by BoxsTim
Slightly off topic, but Castrol Edge 0W40, 5 qt is now available at Walmart for the same price ($25.17) as Mobil 1 0W40, 5 qt.
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Excellent news. I didn't see the Castrol last time I was buying oil at Walmart-- a month ago.
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05-21-2014, 07:56 AM
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#11
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Registered User
Join Date: May 2014
Location: Denver
Posts: 2
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Thanks, good information. My mechanic is draining the transmission fluid and looking for metal shavings. If none, I am just going to chance it and hope for the best.
Ed
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08-30-2014, 08:41 PM
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#12
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Registered User
Join Date: Sep 2009
Location: The City
Posts: 1,084
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Quote:
Originally Posted by dghii
Pretty ballsie to go straight to the oil question in a first post!
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I would be a liar if I did not admit that upon seeing this thread I rubbed my hands together in anticipation and let out a "it's on" style war cry.
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05-21-2014, 08:44 AM
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#13
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Registered User
Join Date: Jun 2013
Location: Socal
Posts: 560
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08-30-2014, 03:29 PM
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#15
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Registered User
Join Date: Aug 2009
Posts: 1,466
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Quote:
Originally Posted by amagalla
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I guess the big question is are you interested in preventing wear of the aluminum parts in the engine or cleaning carbon buildup caused by low diesel cetane levels. Diesel oils have high levels of detergent because diesel fuels burn dirty. So much so that it removes the ZDDP and other film creating additives that aluminum high rev engine need to prevent wear. At least you'll have a very clean engine with scored cylinders, gaulded lifter carriers, and cam bearing ways
__________________
2003 Black 986. modified for Advanced level HPDE and open track days.
* 3.6L LN block, 06 heads, Carrillo H rods, IDP with 987 intake, Oil mods, LN IMS. * Spec II Clutch, 3.2L S Spec P-P FW. * D2 shocks, GT3 arms & and links, Spacers front and rear * Weight reduced, No carpet, AC deleted, Remote PS pump, PS pump deleted. Recaro Pole position seats, Brey crouse ext. 5 point harness, NHP sport exhaust
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08-30-2014, 04:33 PM
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#16
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Registered User
Join Date: Nov 2009
Location: San Jose , CA
Posts: 579
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Quote:
Originally Posted by jsceash
I guess the big question is are you interested in preventing wear of the aluminum parts in the engine or cleaning carbon buildup caused by low diesel cetane levels. Diesel oils have high levels of detergent because diesel fuels burn dirty. So much so that it removes the ZDDP and other film creating additives that aluminum high rev engine need to prevent wear. At least you'll have a very clean engine with scored cylinders, gaulded lifter carriers, and cam bearing ways
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So it sounds like you are (sarcastically) saying that you don't like this oil because of the high level of detergents and low zn, p and ZDDP it contains.
5W40 MOBIL 1 TURBO DIESEL TRUCK synthetic
zinc = 1211 ppm
phos = 1168 ppm
ZDDP = 1100 ppm
These seem like fairly solid number to me. Not the highest I've seen, but not bad.
It seems that people here are emotional about oil. This "It has to be the best stuff or you might as well set your engine on fire" attitude is not helpful when someone is trying to ask a simple question. Honestly, I'm not asking if it's OK to put the cheapest dino oil in my car and expect it to run 100k miles without changing it.
Shame on you people.
All I want is a simple answer. Is the Mobil1 5W40 turbo diesel oil usable? If you don't have a useful, constructive response, please don't waste your time (or mine) by posting.
Tony
__________________
Lapis Blue 03 Boxster S
Seal Grey 04 Boxster S (RIP 9-21-14)
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08-30-2014, 05:11 PM
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#17
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Damn Yankee
Join Date: Mar 2013
Location: Dallas
Posts: 1,117
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Simple answer:
No, don't use it. There are plenty of oils preferred by conscientious and diligent owners that are approved by Porsche for the M96/97 engine.
Don't try to shame anyone..........do your own research.
TO
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08-31-2014, 05:39 AM
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#18
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Registered User
Join Date: Aug 2009
Posts: 1,466
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[QUOTE=
It seems that people here are emotional about oil. This "It has to be the best stuff or you might as well set your engine on fire" attitude is not helpful when someone is trying to ask a simple question. Honestly, I'm not asking if it's OK to put the cheapest dino oil in my car and expect it to run 100k miles without changing it.
Shame on you people.
All I want is a simple answer. Is the Mobil1 5W40 turbo diesel oil usable? If you don't have a useful, constructive response, please don't waste your time (or mine) by posting.
Tony[/QUOTE]
Good luck on future searches. I gave you a good, honest, documented answer. which you didn't want to hear. Being open minded goes both ways. Shame on who?
__________________
2003 Black 986. modified for Advanced level HPDE and open track days.
* 3.6L LN block, 06 heads, Carrillo H rods, IDP with 987 intake, Oil mods, LN IMS. * Spec II Clutch, 3.2L S Spec P-P FW. * D2 shocks, GT3 arms & and links, Spacers front and rear * Weight reduced, No carpet, AC deleted, Remote PS pump, PS pump deleted. Recaro Pole position seats, Brey crouse ext. 5 point harness, NHP sport exhaust
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08-31-2014, 06:08 AM
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#19
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Registered User
Join Date: Oct 2010
Location: Nampa, ID.
Posts: 488
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Let me add my 2 cents. No you are all wrong. You will blowup your engines and go to Porsche Hell if you don't use 10W/40 or 10W/50. (Tongue firm planted in check.)
But I do believe that lighter than 10W is not the best choice for me. Just how I roll.
__________________
2000 Boxster S
And then there are the Motorcycles.
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08-30-2014, 12:36 PM
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#20
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Registered User
Join Date: Dec 2013
Location: Dahlonega , Georgia
Posts: 1,350
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I've had several visits to Jake Raby's shop since I got my 02 S. To start with Jake has probably seen/documented every engine failure that has every occurred in these engines. He has real data based on engine dyno runs, real world long distance runs plus hundreds if not thousands of customer feedback miles. Add to that he has done thousands of oil analysis tests and he recommends Joe Gibbs Racing oil. That's good enough for me. No I am not a blind sheep but real world testing vs. internet gibberish I'll take real world testing every time. Yes it's a little bit of a pain to order it over the net vs. going to Wally world or local FLAPS but I want my engine to live. I could give a rats ass that it's not an approved Porsche oil or doesn't have a shiny Mobil sticker on it but I'm looking for consistent protection. Rant over have fun out there. 
__________________
2002 Boxster S Arctic Silver with black top with glass window and black leather interior. Jake Raby 3.6 SS ( the beast ) with IMS Solution. 996 GT3 front bumper , GT3 rocker covers and GT3TEK rear diffuser and Joe Toth composites rear ducktail spoiler .
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