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#1514566 - 06/28/09 02:01 PM Castrol Syntec or Mobil 1-Which one/Why?
Dually Offline


Registered: 07/19/04
Posts: 503
Loc: Long Island/New York
If you had to select between these two oils which one would you spend your money on? Thanks Joe
_________________________
2006 Jeep/Grand Cherokee Overland/Hemi-5.7 lite/6K OCI/Gold Plug oil drain plug/Castrol 5W-20

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#1514572 - 06/28/09 02:05 PM Re: Castrol Syntec or Mobil 1-Which one/Why? [Re: Dually]
HTSS_TR Offline


Registered: 04/17/06
Posts: 14347
Loc: Lake Forest, CA
M1 over Syntec any time.
_________________________
'94 Lexus LS400
'00 MB E430
'04 Honda S2000
'06 Volvo V70
"Throwing food away is like stealing it from the poor and hungry" Pope Francis

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#1514578 - 06/28/09 02:10 PM Re: Castrol Syntec or Mobil 1-Which one/Why? [Re: Dually]
AzFireGuy79 Offline


Registered: 03/08/08
Posts: 1286
Loc: Arizona
What kind of use and OCI would be the first question I would ask. I prefer Mobil 1 because of having used it in the past and liking the results. Many say that it has more robust base oils and an equally aggressive additive package. Syntec isn't even in the same league in my opinion. At the end of the day both are going to work fine with a reasonable OCI. The answer to your question really will be, Brand Preference from everyone here.
_________________________
2008 Chevrolet 2500HD 6.6 DMAX, CCSB,Z71
2011 JEEP Grand Cherokee Overland HEMI 5.7

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#1514594 - 06/28/09 02:20 PM Re: Castrol Syntec or Mobil 1-Which one/Why? [Re: AzFireGuy79]
Bryanccfshr Offline


Registered: 10/09/04
Posts: 5416
Loc: Durango, Co
Castrol Syntec.. It seems we don't have alot of data on its performance here. Personally I think they are a little proud on price. Unless more data is gathered I would spend my money on the M1.

I am running Syntec in my company vehicl.. actually my company is running syntec in all of them. This is an oppurtunity to get some data.
_________________________
Integrity is what we do when no one's looking.

2010 FJ Cruiser
Mobil 1 0w20 10k mile or 1 year WECF OCI's
2012 BMW F30 with the new N20
Tbd

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#1514612 - 06/28/09 02:34 PM Re: Castrol Syntec or Mobil 1-Which one/Why? [Re: Bryanccfshr]
SLCraig Offline


Registered: 12/21/08
Posts: 5361
Loc: London, ON, Canada
Unless we're talking German 0w30, Mobil1 gets my vote. Otherwise, GC is great stuff, and use in my fathers VQ30.

I had some Syntec 5w30 that I put in my SL1 when I had it, it was the thinnest 5w I've ever used. the consumption was the highest with this oil out of any oil I've ever poured into that crankcase. And for the price, not interested in going that route ever again.
_________________________
2010 Civic SI sedan 6MT
F1 Syn 5w30 | PureONE | Pennzoil MTF

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#1514672 - 06/28/09 03:21 PM Re: Castrol Syntec or Mobil 1-Which one/Why? [Re: HTSS_TR]
gfh77665 Offline


Registered: 09/01/08
Posts: 2626
Loc: Southeast Texas
 Originally Posted By: HTSS_TR
M1 over Syntec any time.


Definitely yes.

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#1514675 - 06/28/09 03:24 PM Re: Castrol Syntec or Mobil 1-Which one/Why? [Re: gfh77665]
lexus114 Offline


Registered: 05/12/08
Posts: 6047
Loc: Easton, PA
Just as SLCraig put it into words..Unless it`s GC then Mobil-1 for me.
_________________________
2012 Mercedes-Benz C300 4matic
2015 Lexus RX350 AWD

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#1514677 - 06/28/09 03:27 PM Re: Castrol Syntec or Mobil 1-Which one/Why? [Re: lexus114]
tig1 Offline


Registered: 01/03/09
Posts: 10362
Loc: Illinois
M1 is an outstanding oil. Used it since 1978.
_________________________
2007 Ford Fusion 152,000 miles
M1 0-20 AFE
2007 Ford Focus 136,000 miles
M1 0-20 AFE
10,000 mile OCIs on both engines
M1 ATF
M1 10-30 in all OPE

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#1514685 - 06/28/09 03:37 PM Re: Castrol Syntec or Mobil 1-Which one/Why? [Re: tig1]
Spykem4e Offline


Registered: 10/23/08
Posts: 385
Loc: Montreal, canada
M1 would be my choice!
_________________________
2005 Cadillac CTS
3.6l v6 vvt with 182k miles
OLM OCI (10k-15k miles)

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#1514708 - 06/28/09 04:30 PM Re: Castrol Syntec or Mobil 1-Which one/Why? [Re: Spykem4e]
BobFout Offline


Registered: 03/23/09
Posts: 2682
Loc: Indiana
I would use Mobil 1 over Syntec.
_________________________
2003 VW Jetta TDI, tons o' mods with turbo upgrade. Red Line 0w40.
Amsoil * Mobil 1 * Redline * Royal Purple * Castrol * Shell

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#1514712 - 06/28/09 04:32 PM Re: Castrol Syntec or Mobil 1-Which one/Why? [Re: BobFout]
wannafbody Offline


Registered: 01/02/08
Posts: 895
Loc: PA
M1 OW30 or GC 0W30. Othergrades Edge or M1
_________________________
2000 TA WS6

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#1514723 - 06/28/09 04:54 PM Re: Castrol Syntec or Mobil 1-Which one/Why? [Re: wannafbody]
2oldtommy Offline


Registered: 10/29/06
Posts: 843
Loc: Ohio
I have been very happy with PP, M1, Syntec or Synpower. The one that has the low price for the moment goes in my cars. FWIW-- Oldtommy

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#1514838 - 06/28/09 07:04 PM Re: Castrol Syntec or Mobil 1-Which one/Why? [Re: BobFout]
aquariuscsm Offline


Registered: 12/30/06
Posts: 10872
Loc: South Texas,USA
 Originally Posted By: BobFout
I would use Mobil 1 over Syntec.


^^Absolutely! M1>Syntec........no contest


Edited by aquariuscsm (06/28/09 07:05 PM)
_________________________
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Syntec 10W40/Fram Ultra
Amsoil MTG(tranny)
Amsoil 80W90 GL5(rear diff)
Mobil 1 ATF
Redline Water Wetter

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#1514896 - 06/28/09 08:19 PM Re: Castrol Syntec or Mobil 1-Which one/Why? [Re: aquariuscsm]
Drivebelt Offline


Registered: 04/12/06
Posts: 782
Loc: Alberta
I think Syntec is an excellent oil that is underrated sometimes.

So, Castrol Syntec over M1. The only grade of M1 I would take over Syntec is the TDT 5W-40.

I think Castrol's base oils (Group III+ wax isomerate) are at least as good as the PAO/GIII blends M1 is using. And I have concerns about the high iron many of the lighter grades of M1 produces on many UOA's. And M1 can be noisy.

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#1514918 - 06/28/09 08:45 PM Re: Castrol Syntec or Mobil 1-Which one/Why? [Re: Drivebelt]
GMBoy Offline


Registered: 11/22/04
Posts: 6758
Loc: Texas
Mobil 1. Even if Syntec were a better oil, Castrol's whole marketing of it as "synthetic" years back really set me off. And that opened the whole can of worms with hydro-cracked oils being labeled as syn.

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