05-10-2015, 08:40 PM
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#21
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On the slippery slope
Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,799
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Everyone's a fargin expert
And opinions are like iceholes, everyone's got one and some are smelly and stinky
In any case, $24 for 5 quarts is a bargin
__________________
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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05-10-2015, 10:32 PM
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#22
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Registered User
Join Date: May 2013
Location: North Alabama
Posts: 2,079
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Its for real
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05-11-2015, 04:13 AM
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#23
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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 schnellman
Which, by the way, has not failed me in over 100,000 miles. I'm pretty satisfied.
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Mine has wobble and no grease at 130k miles. I'd consider it. Glad I didn't skip it.
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'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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05-11-2015, 04:16 AM
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#24
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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 Gelbster
The formulation of Mobil 1 has changed significantly since it was originally recommended by Porsche for the M96.
Check the JGDT40 threads and Bitog site for specifics.
Tribology has advanced a lot since the 1990's ,so it is possible to spec an oil more closely to the M96's peculiar needs now than it was 20+ years ago. These criteria become more important as the miles accumulate on an M96 ?
Just compare the specs of the Old vs.New Mobil 1 and JGDT40. Significant differences .
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My 04 has the Mobile 1 sticker.
Hold on. I'll do that math. Seems 20+ year claim is too much.
Hey. 11 years. 
__________________
'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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05-11-2015, 07:59 AM
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#25
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Registered User
Join Date: Nov 2004
Location: New Jersey
Posts: 8,709
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Quote:
Originally Posted by Gelbster
The formulation of Mobil 1 has changed significantly since it was originally recommended by Porsche for the M96.
Check the JGDT40 threads and Bitog site for specifics.
Tribology has advanced a lot since the 1990's ,so it is possible to spec an oil more closely to the M96's peculiar needs now than it was 20+ years ago. These criteria become more important as the miles accumulate on an M96 ?
Just compare the specs of the Old vs.New Mobil 1 and JGDT40. Significant differences .
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^ Bingo.
We have heard from people who take these engines apart AFTER 100K miles, and they all seem to be on the same page. If you can budget for a better quality oil, you definitely want to do so. This isn't a Jetta.
And none of these engine experts are wild about Mobil 1 on these older cars. The Tony Callas piece in Excellence Magazine some time back was interesting to me. Here is a magazine that is heavily "influenced" by having a good
relationship with Porsche (and their official oil) and they still printed his opinion that "mass market" oil are not such a great idea anymore as they see fewer and fewer protective additives going in. And not surprisingly.... the prices have been coming down, even before this (temporary) crude oil collapse. Meanwhile those protective additives.... yep still expensive.
Like anything else in life, as the engine gets older, it needs more looking after. When you've got a brand new engine and you're getting every one of the ponies you paid for, the old Mobil 1 was probably okay (so as long as you drove the car frequently and didn't let it sit). As it gets older it needs some extra protection. Buying oil you'll change once a year, in most cases, on the basis of which is the cheapest acceptable option is nuts.
What's worse is if you register low mileage and the car sits for long stints, then the cheapest acceptable option isn't really worth the $50 you saved and spent on dinner that night.
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GT3 Recaro Seats - Boxster Red
GT3 Aero / Carrera 18" 5 spoke / Potenza RE-11
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BORN: March 2000 - FINLAND
IMS#1 REPLACED: April 2010 - NEW JERSEY -- LNE DUAL ROW
Last edited by Perfectlap; 05-11-2015 at 08:08 AM.
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05-11-2015, 03:16 PM
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#26
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Registered User
Join Date: Jan 2013
Location: Houston
Posts: 370
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Quote:
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Just compare the specs of the Old vs.New Mobil 1 and JGDT40
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Where are the specs for JGDT40? I can't find the ZDDP numbers for example.
__________________
DD summer/winter: 2000 Boxster S
DD spring/fall: 914-6 w/ 3.0L SC Dual Webers
http://imgur.com/a/k0Wtl - My 914-6 Build/Project Story
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05-11-2015, 05:09 PM
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#27
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Registered User
Join Date: Apr 2007
Location: Bay Area
Posts: 524
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__________________
2008 Boxster S PDE2
02 Boxster S Blk on Blk(Stock for the Wife)
88 turbo S (My Toy) slightly modified
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05-12-2015, 01:05 PM
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#28
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Registered User
Join Date: Sep 2013
Location: Calgary
Posts: 177
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I am not all that convinced the above link is something I would trust,
If he is that good of a of an engineer I would of expected a write in a professional organization magazine.
Think I will stick with what is working for me.
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05-12-2015, 03:56 PM
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#29
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Need For Speed
Join Date: Feb 2013
Location: Funville
Posts: 2,114
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Mobil 1 0W-40 has been fine for me. It also makes recycling the used oil easier pouring it back into the 5 qt jugs, instead of messing with trying to pour the used oil into all those 1 qt bottles.
You listen Jake Raby? We need the the DT40 in 5 qt jugs!
__________________
2003 Boxster S
| 987 Air Box | K&N Air Filter | 76mm Intake Pipe| 996 76mm TB | 997 Distribution T | Secondary Cat Delete Pipes | Borla Muffler | NHP 200 Cell Exhaust Headers |
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05-12-2015, 04:18 PM
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#30
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Registered User
Join Date: May 2014
Location: S.California
Posts: 2,029
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If we had ZDDP numbers for JGDT40,would we know if it is good/bad ? Tribology is a tough enough subject to master but when you overlay the M96 quirks on the subject it becomes fiendishly complicated to figure out which is best oil based on any data.
It comes down to faith in whoever makes a recommendation. So it is a 1990's Mobil spec that is no longer available vs.JGDT40 Lake Speed/Raby.
This link gives some comparative data for Mobil 1 vs. JGDT40.Just scroll down to the piece on oil.
Flat 6 Innovations Summer Newsletter
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05-12-2015, 08:48 PM
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#31
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Registered User
Join Date: Jan 2013
Location: Houston
Posts: 370
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Quote:
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If we had ZDDP numbers for JGDT40,would we know if it is good/bad ?
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No...but it's a start. And they specifically advertise the product as "high zinc". "High" is relative. I'm a science person - I want to see numbers back up a claim.
__________________
DD summer/winter: 2000 Boxster S
DD spring/fall: 914-6 w/ 3.0L SC Dual Webers
http://imgur.com/a/k0Wtl - My 914-6 Build/Project Story
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05-12-2015, 09:00 PM
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#32
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Custom User Title Here
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,167
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Quote:
Originally Posted by Gelbster
If we had ZDDP numbers for JGDT40,would we know if it is good/bad ? Tribology is a tough enough subject to master but when you overlay the M96 quirks on the subject it becomes fiendishly complicated to figure out which is best oil based on any data.
It comes down to faith in whoever makes a recommendation.
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No offense since you seem like a good guy with good intentions, but these statements made my jaw drop! 
I never take a manufacturers word for their product as they are obviously trying to turn a profit. It's not difficult to make the choice to educate yourself on a subject. 
Yes, I want the ZDDP numbers for JGDT40 and yes, anyone can choose to understand them.
Personally, I never make an uneducated choice based on "faith".
Last edited by particlewave; 05-12-2015 at 09:03 PM.
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05-13-2015, 04:02 AM
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#33
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Registered User
Join Date: Nov 2009
Location: Madison, Georgia
Posts: 1,012
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...and the next step is entrenchment and then name calling.
__________________
2001 Boxster S 3.6L, Zeintop
"Calling upon my years of experience, I froze at the controls." - Stirling Moss
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05-13-2015, 05:32 AM
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#34
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Registered User
Join Date: May 2013
Location: North Alabama
Posts: 2,079
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And then
The pie throwing 
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05-13-2015, 07:02 AM
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#35
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Registered User
Join Date: Jul 2014
Location: Listowel, Ontario, Canada
Posts: 1,120
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And then...
...Cats. 
__________________
2011 Boxster 987.2 Arctic silver / Black leather, PDK with Sports Chrono Package Plus
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05-13-2015, 11:55 AM
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#36
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Registered User
Join Date: Jul 2004
Location: Houston, Texas
Posts: 7,243
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I'm totally in for cat throwing.
Been using Royal Purple for 5 years now. I like it because it looks the same going in the filler tube as it does coming out the drain pan, keeping the mystery alive. Is it cleaning or not? Who knows!
It never goes on sale at Wally world 
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05-13-2015, 12:30 PM
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#37
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Registered User
Join Date: Nov 2004
Location: New Jersey
Posts: 8,709
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Quote:
Originally Posted by RandallNeighbour
I'm totally in for cat throwing.
Been using Royal Purple for 5 years now. I like it because it looks the same going in the filler tube as it does coming out the drain pan, keeping the mystery alive. Is it cleaning or not? Who knows!
It never goes on sale at Wally world |
have you had an oil analysis? I don't think we've had a member using RP post one in the GD section.
__________________
GT3 Recaro Seats - Boxster Red
GT3 Aero / Carrera 18" 5 spoke / Potenza RE-11
Fabspeed Headers & Noise Maker
BORN: March 2000 - FINLAND
IMS#1 REPLACED: April 2010 - NEW JERSEY -- LNE DUAL ROW
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