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Why is Castrol GTX now labelled semi synthetic? #4559496
10/30/17 06:27 PM
10/30/17 06:27 PM
Joined: Jun 2012
Posts: 532
Atlantic, Canada
wolf_06 Offline OP
wolf_06  Offline OP

Joined: Jun 2012
Posts: 532
Atlantic, Canada
Were they forced to add "semi synthetic" on the bottle or its always been a semi synthetic without knowing it?


2011 Chevy Cruze 1.8L 6AT
Castrol Magnatec syn blend 5w30, NAPA filter.
Re: Why is Castrol GTX now labelled semi synthetic? [Re: wolf_06] #4559504
10/30/17 06:32 PM
10/30/17 06:32 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline

Joined: Jan 2007
Posts: 17,501
Clovis, CA
Show me where it says "semi synthetic" !

Re: Why is Castrol GTX now labelled semi synthetic? [Re: Merkava_4] #4559506
10/30/17 06:33 PM
10/30/17 06:33 PM
Joined: Jun 2012
Posts: 532
Atlantic, Canada
wolf_06 Offline OP
wolf_06  Offline OP

Joined: Jun 2012
Posts: 532
Atlantic, Canada
Well a blend!!


2011 Chevy Cruze 1.8L 6AT
Castrol Magnatec syn blend 5w30, NAPA filter.
Re: Why is Castrol GTX now labelled semi synthetic? [Re: wolf_06] #4559507
10/30/17 06:33 PM
10/30/17 06:33 PM
Joined: Mar 2008
Posts: 7,914
USA
slacktide_bitog Offline
slacktide_bitog  Offline

Joined: Mar 2008
Posts: 7,914
USA
SN "dino" has at least some synthetic in it due to the stringent standards.

Re: Why is Castrol GTX now labelled semi synthetic? [Re: wolf_06] #4559510
10/30/17 06:33 PM
10/30/17 06:33 PM
Joined: Aug 2008
Posts: 24,117
ON, Canada eh?
StevieC Offline
StevieC  Offline

Joined: Aug 2008
Posts: 24,117
ON, Canada eh?
I figure it's probably because the standards on conventional oil are getting really tough to meet that most are adding synthetic components to their oil to meet specifications and why not advertise it.

Also probably to justify the price because Castrol GTX is much more than PYB for example, at least here anyway.


'18 Dodge Grand Caravan GT - 25k KM - AMSOIL SS 0w20

Fear 20wt oils if you want your engine to last. smirk2
Re: Why is Castrol GTX now labelled semi synthetic? [Re: wolf_06] #4559514
10/30/17 06:35 PM
10/30/17 06:35 PM
Joined: Oct 2009
Posts: 4,041
Wet side WA
JohnnyJohnson Offline
JohnnyJohnson  Offline

Joined: Oct 2009
Posts: 4,041
Wet side WA
Some GTX has always been blend its never been a secret its always been right on the Jug. While others have been marked Full Synthetic!

https://www.walmart.com/ip/Castrol-GTX-MAGNATEC-5W-20-Full-Synthetic-Motor-Oil-5-QT/44580673

https://www.walmart.com/ip/Castrol-GTX-High-Mileage-5W-30-Synthetic-Blend-Motor-Oil-5-QT/34039137

Last edited by JohnnyJohnson; 10/30/17 06:38 PM.

2004 Corolla 130017
Out: EDGE EP 5W-30 Bosch 3311 7156 Miles
In: Havoline Pro DS 10w-30 Purolator PureOne 3-14-19 129693
2006 Duramax 74725
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73705 4-22-18
Re: Why is Castrol GTX now labelled semi synthetic? [Re: wolf_06] #4559515
10/30/17 06:35 PM
10/30/17 06:35 PM
Joined: Oct 2005
Posts: 11,554
PA
d00df00d Offline
d00df00d  Offline

Joined: Oct 2005
Posts: 11,554
PA
There's no GTX any more. You're thinking of GTX Ultraclean. Similar name, but different product.


2008 BMW M3 Sedan 6MT
Re: Why is Castrol GTX now labelled semi synthetic? [Re: slacktide_bitog] #4559518
10/30/17 06:35 PM
10/30/17 06:35 PM
Joined: Mar 2015
Posts: 5,880
Virginia
bbhero Offline
bbhero  Offline

Joined: Mar 2015
Posts: 5,880
Virginia
Slacktide is exactly right about this in my opinion.


Nissan Altima 3.5 Coupe
Mobil Super 5w30 Wix 57356
"Treat your family like your friends and treat your friends like your family."
Re: Why is Castrol GTX now labelled semi synthetic? [Re: d00df00d] #4559529
10/30/17 06:40 PM
10/30/17 06:40 PM
Joined: Oct 2009
Posts: 4,041
Wet side WA
JohnnyJohnson Offline
JohnnyJohnson  Offline

Joined: Oct 2009
Posts: 4,041
Wet side WA
Originally Posted By: d00df00d
There's no GTX any more. You're thinking of GTX Ultraclean. Similar name, but different product.


Better tell Walmart that their still selling it look at their online site.

A Walmart current online listing

https://www.walmart.com/ip/Castrol-GTX-M...=10&veh=aff


Last edited by JohnnyJohnson; 10/30/17 06:46 PM.

2004 Corolla 130017
Out: EDGE EP 5W-30 Bosch 3311 7156 Miles
In: Havoline Pro DS 10w-30 Purolator PureOne 3-14-19 129693
2006 Duramax 74725
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73705 4-22-18
Re: Why is Castrol GTX now labelled semi synthetic? [Re: Merkava_4] #4559534
10/30/17 06:46 PM
10/30/17 06:46 PM
Joined: Apr 2012
Posts: 322
Michigan
researcher Offline
researcher  Offline

Joined: Apr 2012
Posts: 322
Michigan
Originally Posted By: Merkava_4
Show me where it says "semi synthetic" !


It says "Synthetic blend" for the GTX Ultraclean, which is only available in 5w20 and 5w30.

Here's the pdf's from Castrol, read in the paragraph under "description"

5w20
https://msdspds.castrol.com/bpglis/FusionPDS.nsf/Files/3C78E248DD0A721780258035006BCAC8/$File/BPXE-A8DJRH.pdf

5w30
https://msdspds.castrol.com/bpglis/FusionPDS.nsf/Files/5DEAD6CF2F00966880258034005B0DB0/$File/BPXE-AAXEC9.pdf


Now about the GTX, while the GTX Ultraclean is now what the 5w20 and 5w30 is called.. The rest of the oil 10w30, 10w40 and 20w50 is conventional and still called GTX.

https://www.castrol.com/en_us/united-states/motor-oil/conventional-motor-oil/gtx-motor-oil.html

I ran into this when I was looking to use Castrol GTX and found the GTX Ultraclean popping up in place of the GTX. The only difference (after I sent off samples to the lab) is it's now a synthetic blend. The additive package is basically the same thing. Which is a good thing!

Re: Why is Castrol GTX now labelled semi synthetic? [Re: wolf_06] #4559536
10/30/17 06:48 PM
10/30/17 06:48 PM
Joined: Aug 2010
Posts: 1,412
pa
benjy Offline
benjy  Offline

Joined: Aug 2010
Posts: 1,412
pa
with the advent of cheap group III "synthetics" that are mostly used today it takes a very small amount to be advertised as semi-synthetic!!! all of todays oils are a blend of various base oils + additives used to meet the spec they are showing on the container!

Re: Why is Castrol GTX now labelled semi synthetic? [Re: researcher] #4559547
10/30/17 06:53 PM
10/30/17 06:53 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline

Joined: Jan 2007
Posts: 17,501
Clovis, CA
Originally Posted By: researcher
Now about the GTX, while the GTX Ultraclean is now what the 5w20 and 5w30 is called.. The rest of the oil 10w30, 10w40 and 20w50 is conventional and still called GTX.


Typical. 10W-30 is always getting shortchanged.

Re: Why is Castrol GTX now labelled semi synthetic? [Re: wolf_06] #4559572
10/30/17 07:14 PM
10/30/17 07:14 PM
Joined: Jun 2011
Posts: 1,833
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline

Joined: Jun 2011
Posts: 1,833
Crawfordville FL
10w-30 doesn't need the fancy base stocks to meet spec. That's less VI for ya


2010 Ford Fusion SE 3.0L V6, 181 miles M1 HM 10w-30
Re: Why is Castrol GTX now labelled semi synthetic? [Re: wolf_06] #4559575
10/30/17 07:15 PM
10/30/17 07:15 PM
Joined: Apr 2012
Posts: 322
Michigan
researcher Offline
researcher  Offline

Joined: Apr 2012
Posts: 322
Michigan
hey Merkava_4, I didn't make the marketing decision. hide

but I hear ya.. I really don't think it's much of a change at all, I did the VOA's and it's not like it's missing much of anything if you use GTX or the GTX Ultraclean, just a bit more detergents, not much to upset me, personally.

Re: Why is Castrol GTX now labelled semi synthetic? [Re: wolf_06] #4559578
10/30/17 07:18 PM
10/30/17 07:18 PM
Joined: Nov 2013
Posts: 366
Fly-over country
zuluplus30 Offline
zuluplus30  Offline

Joined: Nov 2013
Posts: 366
Fly-over country
Valvoline conventional says the same thing. "Premium quality synthetic blend base stocks" The lines between conventional/synthetic blend/synthetic got REALLY blurry with SN/GF-5.


https://sharena21.springcm.com/Public/Do...12-ac162d889bd1

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