Gumout GDI Q&A Answers

click here for the Gumout GDI Q&A answers

Recent Topics
Lawn Mower Oil Filter Prices - WTB Cheap
by tony1679
07/07/15 05:23 AM
What was your fun / care free car?
by Rick in PA
07/07/15 04:41 AM
A Funny Memory - Old Friend's Auto Tranny
by Triton_330
07/07/15 03:51 AM
Buick Century bad fuel pump?
by 901Memphis
07/07/15 02:14 AM
P4 and Syn power or PYB and VWB question.
by JHogan
07/06/15 11:22 PM
Check Engine Light P0700 Chevy Cobalt 2010
by Dimitri
07/06/15 11:14 PM
Unused Fram Ultra XG7317 cut open A50053 date code
by slacktide_bitog
07/06/15 11:12 PM
5w30 In Honda V-Tech Engines From Dealer
by crazyoildude
07/06/15 10:48 PM
Lisle Coolant Funnel Kit
by user52165
07/06/15 10:22 PM
New Horizons
by simple_gifts
07/06/15 09:53 PM
Jeep Cherokee Love?
by Ramblejam
07/06/15 09:48 PM
5000 miles or 6 month is typical oil change now ?
by MetalSlug
07/06/15 09:46 PM
Newest Members
7124, MrMaz, mb32, laenikov, Tabnorup1976
54610 Registered Users
Who's Online
55 registered (Al, 2010Civic, alarmguy, ActionJoe, B20z, 11 invisible), 819 Guests and 110 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
54610 Members
66 Forums
233930 Topics
3758094 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#2992480 - 05/03/13 05:56 PM Motul 8100 5w40, 9,000 miles, 2002 WRX (18G turbo)
TedMeyer Offline


Registered: 02/06/08
Posts: 39
Loc: AZ
Haven't posted on here for a long time, but recently got a UOA back. This is a 9,000 mile drain interval on Motul 8100 5w40 full-synth -- it's the second change with this oil, which I switched to at the recommendation of my new tuner (I moved to Arizona). I didn't get a sample last time because I had to change my entire oil pan (nasty rock dinged up my undercarriage a bit and directly impacted my temp sensor/drain plug, creating a leaky seal. the new temp sensor is mounted separately in the pan).

I was using Redline for a while (easy to spot with the high molybdenum readings) and GC. Looks like it's holding up just fine despite the long interval and scalding temps we get down here (we can go a month without the temp falling BELOW 90 degrees). I have not done any trackdays on the car for a while though.

Iron obviously is a bit of a concern... not sure if there may be something there with my new oil pan/temp sensor/etc or what. Silicon also high, which may just be a factor of having TONS of dust in the air down here... the mountains outside my house are obscured by blowing dust as I type this. I actually switched from a K&N to a paper filter with my most recent change, so we'll see what happens....

The last UOA thread I posted is here: GC UOA

The car was further modified since then (mostly just porting and ceramic-coating the headers/turbo/exhaust) and retuned, now making about 315 AWHP on 91 octane.

Ted

_________________________
Ted Meyer
'04 Suzuki DR-Z400E
'02 Subaru WRX, 18G Turbo, 315awhp
'01 Ducati Monster 944
'00 Aprilia RS250
'87 Ferrari 328 GTS

Top
#2994460 - 05/06/13 09:45 AM Re: Motul 8100 5w40, 9,000 miles, 2002 WRX (18G turbo) [Re: TedMeyer]
bluesubie Offline


Registered: 08/04/03
Posts: 1969
Loc: NJ
Wow, pretty good report for the mileage IMO! Iron isn't bad at all for a 9k mile interval! Probably a good idea ditching the K&N. You didn't need to add any make-up oil? I think that's amazing. I'm happy if I have to add less than 2 quarts in a 6k mile interval. I probably would have gone for a TBN.

Is this Motul X-cess or X-clean?

-Dennis


Edited by bluesubie (05/06/13 10:00 AM)
_________________________
'04 Subaru Forester 2.5XT
Castrol Edge 0W40

Top
#2994757 - 05/06/13 03:35 PM Re: Motul 8100 5w40, 9,000 miles, 2002 WRX (18G turbo) [Re: TedMeyer]
tdi-rick Online   content


Registered: 02/02/04
Posts: 1826
Loc: the antipodes
Originally Posted By: TedMeyer


Iron obviously is a bit of a concern... not sure if there may be something there with my new oil pan/temp sensor/etc or what. Silicon also high, which may just be a factor of having TONS of dust in the air down here... the mountains outside my house are obscured by blowing dust as I type this. I actually switched from a K&N to a paper filter with my most recent change, so we'll see what happens....

Ted



That will make a quantifiable difference to your silicon and Fe IME.

A friend is a filtration engineer/researcher, has worked with Donaldson, Cummins/Fleetgaurd and Mann-Hummel and co-written peer reviewed papers.
Several years ago we've run tests (well he ran the tests, I just supplied the filters) between several cellulose fibre (paper) and oiled cotton gauze (K&N) 4WD filters in his lab. (IIRC it compared the weight/quntity of very fine latex media fed in upstream vs downstream of the filter)

He isn't impressed with K&N air filters, let alone in a high dust situation and it all backed up what an oil analysis guru had mentioned to me years before when comparing UOA's.


Edited by tdi-rick (05/06/13 03:37 PM)
_________________________
Land Rover.
Helping put oil back in the ground for 60 years.
You can't get any greener than that......

Top
#2997446 - 05/09/13 02:50 PM Re: Motul 8100 5w40, 9,000 miles, 2002 WRX (18G turbo) [Re: TedMeyer]
bluesubie Offline


Registered: 08/04/03
Posts: 1969
Loc: NJ
I think this is Motul X-cess. X-clean has a bit less phosphorus and much less calcium. Hello? Where are you? grin

-Dennis
_________________________
'04 Subaru Forester 2.5XT
Castrol Edge 0W40

Top
#2997673 - 05/09/13 06:52 PM Re: Motul 8100 5w40, 9,000 miles, 2002 WRX (18G turbo) [Re: TedMeyer]
bluesubie Offline


Registered: 08/04/03
Posts: 1969
Loc: NJ
And why in the world were you running Red Line? Lucky your engine didn't explode. buster thinks it sucks. LOL hornets trolling

-Dennis


Edited by bluesubie (05/09/13 06:53 PM)
_________________________
'04 Subaru Forester 2.5XT
Castrol Edge 0W40

Top
#2998511 - 05/10/13 04:59 PM Re: Motul 8100 5w40, 9,000 miles, 2002 WRX (18G turbo) [Re: TedMeyer]
TedMeyer Offline


Registered: 02/06/08
Posts: 39
Loc: AZ
It's 8100 X-Cess. And no, I've never needed to add oil between changes. Ever. Even on a Stage 4, and even when I was running track days regularly. Tight engine, I guess.

With the Redline, you know, I did a lot of research and talked to race mechanics who swear by the stuff. I wouldn't hesitate to use it again. But I'm looking at the Motul thinking it's just as good without the "hair"... And then I look at the GC, and wonder if I shouldn't just use that, since it's generally cheaper and more readily available. I have seen no difference in my oil temps between brands at all, and I don't think the difference in viscosity is much to be concerned about.

We'll see what happens with the paper filter... come to think of it, I don't think the car has had a paper filter in it since a few months after I bought it. What's the theory behind better air filtration reducing iron? Will be interesting to see if that proves true. (Reminds me to change my cabin filter, too!)

Ted
_________________________
Ted Meyer
'04 Suzuki DR-Z400E
'02 Subaru WRX, 18G Turbo, 315awhp
'01 Ducati Monster 944
'00 Aprilia RS250
'87 Ferrari 328 GTS

Top
#2998516 - 05/10/13 05:11 PM Re: Motul 8100 5w40, 9,000 miles, 2002 WRX (18G turbo) [Re: TedMeyer]
bluesubie Offline


Registered: 08/04/03
Posts: 1969
Loc: NJ
Originally Posted By: TedMeyer

We'll see what happens with the paper filter... come to think of it, I don't think the car has had a paper filter in it since a few months after I bought it. What's the theory behind better air filtration reducing iron?

Dirt ingestion can lead to higher wear.

http://www.machinerylubrication.com/Read/89/silicon-engine-oil

-Dennis
_________________________
'04 Subaru Forester 2.5XT
Castrol Edge 0W40

Top
#2998622 - 05/10/13 07:42 PM Re: Motul 8100 5w40, 9,000 miles, 2002 WRX (18G turbo) [Re: TedMeyer]
TedMeyer Offline


Registered: 02/06/08
Posts: 39
Loc: AZ
Sure, but I guess I was wondering why Fe specifically... I guess iron cylinder liners would be the obvious thing....
_________________________
Ted Meyer
'04 Suzuki DR-Z400E
'02 Subaru WRX, 18G Turbo, 315awhp
'01 Ducati Monster 944
'00 Aprilia RS250
'87 Ferrari 328 GTS

Top
#2998696 - 05/10/13 08:41 PM Re: Motul 8100 5w40, 9,000 miles, 2002 WRX (18G turbo) [Re: TedMeyer]
artificialist Offline


Registered: 09/23/07
Posts: 7506
Loc: Florida
Originally Posted By: TedMeyer
Sure, but I guess I was wondering why Fe specifically... I guess iron cylinder liners would be the obvious thing....

Also piston rings. Sometimes Cr goes up with piston ring wear because certain piston rings use an alloy with chromium in it.
_________________________
2010 Lancer Ralliart Sportback

Top
#3001137 - 05/13/13 05:15 PM Re: Motul 8100 5w40, 9,000 miles, 2002 WRX (18G turbo) [Re: TedMeyer]
bluesubie Offline


Registered: 08/04/03
Posts: 1969
Loc: NJ
Had to take my daughter's RS to my buddy's Subaru shop on Saturday to get some stubborn end link bolts removed. The X-cess was just sitting there calling my name so I picked up a 5L jug and 1L bottle. laugh.

-Dennis
_________________________
'04 Subaru Forester 2.5XT
Castrol Edge 0W40

Top
#3029062 - 06/10/13 04:14 PM Re: Motul 8100 5w40, 9,000 miles, 2002 WRX (18G turbo) [Re: TedMeyer]
TedMeyer Offline


Registered: 02/06/08
Posts: 39
Loc: AZ
So I pulled some extra oil from the pan (which was clean, but not surgically clean, so take this with a grain of salt) and had a TBN done...

Result was 2.9. So even if there was some contamination, I'm still impressed with the Motul.

Ted
_________________________
Ted Meyer
'04 Suzuki DR-Z400E
'02 Subaru WRX, 18G Turbo, 315awhp
'01 Ducati Monster 944
'00 Aprilia RS250
'87 Ferrari 328 GTS

Top
#3518349 - 10/22/14 07:13 PM Re: Motul 8100 5w40, 9,000 miles, 2002 WRX (18G turbo) [Re: TedMeyer]
TedMeyer Offline


Registered: 02/06/08
Posts: 39
Loc: AZ
Just to follow up on this, switching to an OEM paper air filter led to a 50% drop in silicon in my next UOA, but no change in iron.

http://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3518345#Post3518345
_________________________
Ted Meyer
'04 Suzuki DR-Z400E
'02 Subaru WRX, 18G Turbo, 315awhp
'01 Ducati Monster 944
'00 Aprilia RS250
'87 Ferrari 328 GTS

Top
#3522061 - 10/26/14 09:00 PM Re: Motul 8100 5w40, 9,000 miles, 2002 WRX (18G turbo) [Re: tdi-rick]
CT8 Offline


Registered: 10/09/14
Posts: 2267
Loc: California
Originally Posted By: tdi-rick
Originally Posted By: TedMeyer


Iron obviously is a bit of a concern... not sure if there may be something there with my new oil pan/temp sensor/etc or what. Silicon also high, which may just be a factor of having TONS of dust in the air down here... the mountains outside my house are obscured by blowing dust as I type this. I actually switched from a K&N to a paper filter with my most recent change, so we'll see what happens....

Ted



That will make a quantifiable difference to your silicon and Fe IME.

A friend is a filtration engineer/researcher, has worked with Donaldson, Cummins/Fleetgaurd and Mann-Hummel and co-written peer reviewed papers.
Several years ago we've run tests (well he ran the tests, I just supplied the filters) between several cellulose fibre (paper) and oiled cotton gauze (K&N) 4WD filters in his lab. (IIRC it compared the weight/quntity of very fine latex media fed in upstream vs downstream of the filter)

He isn't impressed with K&N air filters, let alone in a high dust situation and it all backed up what an oil analysis guru had mentioned to me years before when comparing UOA's.
I am not an engineer [not smart enough] But in the early 1970s we tried them [K@N] on our dirt bikes and found they let in more dirt than the oem filters, judged by the dirt in the carbs.

Top