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#1642766 - 10/23/09 12:34 PM Peak motor oil vs Castrol GTX oil
zvm77us Offline


Registered: 09/01/09
Posts: 51
Loc: brooklyn, ny, usa
Hi,
What do you guys think of peak motor oil vs castrol gtx? I know peak is much cheaper and always on sale, so I am skeptical of it (maybe for nothing)?

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#1642773 - 10/23/09 12:37 PM Re: Peak motor oil vs Castrol GTX oil [Re: zvm77us]
Drew99GT Offline


Registered: 10/11/02
Posts: 20262
Loc: Colorado Springs
I don't like Peak. The specs in the data sheet show it to be subpar compared to bigger brands like Castrol.

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#1642783 - 10/23/09 12:44 PM Re: Peak motor oil vs Castrol GTX oil [Re: Drew99GT]
Anies Offline


Registered: 01/29/09
Posts: 2704
Loc: NJ
It's made by Warren like Supertech(well bottled).

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1424197

Spec's taken from another thread against PYB.
Pennzoil YB 5W-30 / Peak 5W-30
Flash Point: 216 / 206
Pour Point: -39 / -39
Viscosity @ 40C, cSt: 63.9 / 55
Viscosity @ 100C, cSt: 10.5 / 9.94
Viscosity Index: 158 / 169
NOACK Noack volatility, %: 14.5 / 14.5
HT/HS Viscosity, cP: 3.0 / NA


Castrol GTX 5w30
FlashPoint= 220/440
Viscosity @ 100*C CST = 10.6
210* F = 62.1
TBN=9.5


Peak is thinner than the GTX by a bit.


Edited by Anies (10/23/09 12:47 PM)
_________________________
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2011 Subaru Impreza 2.5i (wifey)
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#1642787 - 10/23/09 12:46 PM Re: Peak motor oil vs Castrol GTX oil [Re: Anies]
Drew99GT Offline


Registered: 10/11/02
Posts: 20262
Loc: Colorado Springs
http://www.peakmotoroil.com/spec_sheets/PEAK%20Multigrade%20Oil.pdf

The NOAK for 10w-30 is 15.2. If that's not a typo, that's some crummy oil!


Edited by Drew99GT (10/23/09 12:46 PM)

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#1642788 - 10/23/09 12:46 PM Re: Peak motor oil vs Castrol GTX oil [Re: Anies]
Chuck1986 Offline


Registered: 07/16/05
Posts: 420
Loc: Scottsdale, AZ
Originally Posted By: Anies
It's made by Warren like Supertech(well bottled).

http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1424197

Spec's taken from another thread against PYB.
Pennzoil YB 5W-30 / Peak 5W-30
Flash Point: 216 / 206
Pour Point: -39 / -39
Viscosity @ 40C, cSt: 63.9 / 55
Viscosity @ 100C, cSt: 10.5 / 9.94
Viscosity Index: 158 / 169
NOACK Noack volatility, %: 14.5 / 14.5
HT/HS Viscosity, cP: 3.0 / NA


Castrol GTX 5w30
100* CST = 10.6
210* F = 62.1
FlashPoint= 220/440
TBN=9.5


Where did you get that TBN from?
That's almost too high to be true. I checked Castrol's website and their product data sheet doesn't list the TBN.
_________________________
2001 Mitsu Eclipse GT 70k miles
Castrol Edge 5w-30, G-05, Redline C+ ATF
Wouldn't trade her for a new Eclipse

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#1642789 - 10/23/09 12:47 PM Re: Peak motor oil vs Castrol GTX oil [Re: Chuck1986]
Anies Offline


Registered: 01/29/09
Posts: 2704
Loc: NJ
Er wait, thats the info from 03. [censored] old VOA one sec. I checked their PDS and MSDS sheet but they don't have much info on them. Trying to track down the info for GTX.


Edited by Anies (10/23/09 12:50 PM)
_________________________
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2011 Subaru Impreza 2.5i (wifey)
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#1642794 - 10/23/09 12:51 PM Re: Peak motor oil vs Castrol GTX oil [Re: Anies]
hpichris Offline


Registered: 06/13/09
Posts: 1654
Loc: Eden Prairie MN
Go with GTX. It's on sale everywhere this week too.
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Mazda RX-8 Shinka - Valvoline WB 5W-30
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#1642796 - 10/23/09 12:53 PM Re: Peak motor oil vs Castrol GTX oil [Re: zvm77us]
asiancivicmaniac Offline


Registered: 01/12/05
Posts: 4015
Loc: FL
I think Peak will work perfectly fine if you keep the ocis reasonable. That said, unless you find it at a really good price then I would go with a name brand. A 5qt jug of Quaker State at Wally World is under $10.

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#1642797 - 10/23/09 12:54 PM Re: Peak motor oil vs Castrol GTX oil [Re: hpichris]
sparkplug Offline


Registered: 07/16/08
Posts: 862
Loc: Massena, NY
GTX. I'm a Castrol guy anyways.
_________________________
Mobil 1 0w30 Wix 1085

http://www.fuelly.com/driver/ssmows6/grand-cherokee

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#1642812 - 10/23/09 01:03 PM Re: Peak motor oil vs Castrol GTX oil [Re: sparkplug]
defektes Offline


Registered: 09/09/09
Posts: 3216
Loc: Hesperia, CA, USA
GTX has been shown in UOAs on this site to be a quality dino oil.
_________________________
2002 GMC Sierra 5sp. 4.3L 145K ST3980 E-Core
Chevron Supreme 5w-30, Amsoil Synchromesh In Tranny
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#1642832 - 10/23/09 01:14 PM Re: Peak motor oil vs Castrol GTX oil [Re: defektes]
Anies Offline


Registered: 01/29/09
Posts: 2704
Loc: NJ
A UOA of 5k on a Toyota Tacoma. I know there are few Honda ones with 10k on them but wasn't able to find them that quicly.

http://www.bobistheoilguy.com/forums/ubb...rue#Post1602755
_________________________
2013 Toyota Venza LE AWD (mine)
2011 Subaru Impreza 2.5i (wifey)
+Dealer Serviced

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#1642840 - 10/23/09 01:22 PM Re: Peak motor oil vs Castrol GTX oil [Re: Anies]
Alex38 Offline


Registered: 04/16/09
Posts: 466
Loc: Martin, OH
I'd go with the GTX
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2011 Accord SE: 0w20 M1 AFE
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#1643034 - 10/23/09 03:17 PM Re: Peak motor oil vs Castrol GTX oil [Re: Alex38]
ThirdeYe Offline


Registered: 02/23/07
Posts: 6691
Loc: Grand Rapids, MI
I've used Peak 3 times thus far with no issues to report. I do however prefer GTX, personally.
_________________________
1995 Acura Integra LS - 207,5xx - Valvoline MaxLife Synthetic 5W-30/Purolator Synthetic PSL14459
2001 Honda Civic LX - 56,4xx - Gulf oil/Honda A02

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#1643043 - 10/23/09 03:26 PM Re: Peak motor oil vs Castrol GTX oil [Re: ThirdeYe]
IntegraVT Offline


Registered: 09/03/07
Posts: 320
Loc: Northern NJ
All I know is my wallet loved the free-after-rebate-at-PepBoys Peak.

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#1643053 - 10/23/09 03:37 PM Re: Peak motor oil vs Castrol GTX oil [Re: defektes]
Jaymus Offline


Registered: 05/11/07
Posts: 1209
Loc: Tennessee
GTX would be the better quality oil, and imo, I'd pay the extra money for it if it was between the two.
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1986 F150 5.0 EFI 4x4 NP435/NP208 9" rear 3.50:1 31x10.50 Wrangler Authority's
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