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#4444251 - 06/28/17 08:01 PM Why is the new Castrol GTX not dexos1 approved?
wolf_06 Offline


Registered: 06/11/12
Posts: 491
Loc: Atlantic, Canada
Hey folks,

Came back from Walmart and noticed the new Castrol GTX ultraclean, and it mentions semi synthetic on the jug.

This is bugging me, why is this oil not even on the dexos list, and other semi synthetic are?

What would happen if I used it in my cruze?
_________________________
2011 Chevy Cruze 1.8L 6AT
Castrol Magnatec syn blend 5w30, NAPA filter.

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#4444253 - 06/28/17 08:04 PM Re: Why is the new Castrol GTX not dexos1 approved? [Re: wolf_06]
PimTac Offline


Registered: 03/04/17
Posts: 4213
Loc: Soviet State of Washington
The transition to dexos gen2 is in progress so you will see this with most of the brands as we move forward. Companies are reformulating products right now to meet the new standards
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#4444257 - 06/28/17 08:12 PM Re: Why is the new Castrol GTX not dexos1 approved? [Re: wolf_06]
JBinTX30 Offline


Registered: 09/08/14
Posts: 475
Loc: Texas
I wonder what will use the 0w-16 and 5w-16.
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05 GMC Yukon XL SLT 5.3 EDGE 5w30
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#4444259 - 06/28/17 08:14 PM Re: Why is the new Castrol GTX not dexos1 approved? [Re: JBinTX30]
wolf_06 Offline


Registered: 06/11/12
Posts: 491
Loc: Atlantic, Canada
Isn't the new Camry will??
_________________________
2011 Chevy Cruze 1.8L 6AT
Castrol Magnatec syn blend 5w30, NAPA filter.

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#4444266 - 06/28/17 08:21 PM Re: Why is the new Castrol GTX not dexos1 approved? [Re: wolf_06]
Spoooolin Offline


Registered: 06/27/17
Posts: 7
Loc: Houston, TX
Originally Posted By: wolf_06
Isn't the new Camry will??


It will be an option, yes.

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#4444267 - 06/28/17 08:21 PM Re: Why is the new Castrol GTX not dexos1 approved? [Re: wolf_06]
userfriendly Offline


Registered: 06/03/03
Posts: 2629
Loc: LaFinDuMonde
Lu;
I tried 5W30 GTX in 3 vehicles 2 years ago. It was on half price and came with a free Frampa filter with each 5L jug.
In short order, it turned the inside of all 3 engines orange as seen from the oil fill.
A HDEO 10W30 synthetic blend cleaned up the engines, but the oil turned orange in the process.
There is no minimum synthetic quantity to call an engine oil "synthetic blend, or semi-synthetic", OEM approvals weed out the bad examples.


Edited by userfriendly (06/28/17 08:22 PM)

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#4444271 - 06/28/17 08:24 PM Re: Why is the new Castrol GTX not dexos1 approved? [Re: wolf_06]
TmanP Offline


Registered: 10/30/15
Posts: 436
Loc: MN
I think that, while it is a blend, it's not a strong enough blend to meet the relatively stringent dexos specs. Basically all SN oils are blends to some degree. The term "blend" doesn't mean much.
_________________________
2006 Buick Lacrosse 3.8 V6 150,000 mi
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#4444418 - 06/28/17 10:45 PM Re: Why is the new Castrol GTX not dexos1 approved? [Re: wolf_06]
oil_film_movies Offline


Registered: 06/13/16
Posts: 2548
Loc: MN
Originally Posted By: wolf_06
What would happen if I used it in my cruze?
Doubt it would hurt anything in Cruze.
Why not just get something that actually says dexos1 on it? Its a higher spec than just SN GF-5.

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