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Why is the new Castrol GTX not dexos1 approved? #4444251
06/28/17 08:01 PM
06/28/17 08:01 PM
Joined: Jun 2012
Posts: 524
Atlantic, Canada
wolf_06 Offline OP
wolf_06  Offline OP
Joined: Jun 2012
Posts: 524
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.
Re: Why is the new Castrol GTX not dexos1 approved? [Re: wolf_06] #4444253
06/28/17 08:04 PM
06/28/17 08:04 PM
Joined: Mar 2017
Posts: 5,457
Soviet State of Washington
PimTac Online content
PimTac  Online Content
Joined: Mar 2017
Posts: 5,457
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


2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter

Re: Why is the new Castrol GTX not dexos1 approved? [Re: wolf_06] #4444257
06/28/17 08:12 PM
06/28/17 08:12 PM
Joined: Sep 2014
Posts: 485
Texas
JBinTX30 Offline
JBinTX30  Offline
Joined: Sep 2014
Posts: 485
Texas
I wonder what will use the 0w-16 and 5w-16.


05 GMC Yukon XL SLT 5.3 CE 5w30 51042
06 Chevy Trailblazer LS 4.2 PP 5w30 XG9837
Re: Why is the new Castrol GTX not dexos1 approved? [Re: JBinTX30] #4444259
06/28/17 08:14 PM
06/28/17 08:14 PM
Joined: Jun 2012
Posts: 524
Atlantic, Canada
wolf_06 Offline OP
wolf_06  Offline OP
Joined: Jun 2012
Posts: 524
Atlantic, Canada
Isn't the new Camry will??


2011 Chevy Cruze 1.8L 6AT
Castrol Magnatec syn blend 5w30, NAPA filter.
Re: Why is the new Castrol GTX not dexos1 approved? [Re: wolf_06] #4444266
06/28/17 08:21 PM
06/28/17 08:21 PM
Joined: Jun 2017
Posts: 7
Houston, TX
Spoooolin Offline
Spoooolin  Offline
Joined: Jun 2017
Posts: 7
Houston, TX
Originally Posted By: wolf_06
Isn't the new Camry will??


It will be an option, yes.

Re: Why is the new Castrol GTX not dexos1 approved? [Re: wolf_06] #4444267
06/28/17 08:21 PM
06/28/17 08:21 PM
Joined: Jun 2003
Posts: 2,695
BC, Canada
userfriendly Offline
userfriendly  Offline
Joined: Jun 2003
Posts: 2,695
BC, Canada
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.

Last edited by userfriendly; 06/28/17 08:22 PM.
Re: Why is the new Castrol GTX not dexos1 approved? [Re: wolf_06] #4444271
06/28/17 08:24 PM
06/28/17 08:24 PM
Joined: Oct 2015
Posts: 440
MN
TmanP Offline
TmanP  Offline
Joined: Oct 2015
Posts: 440
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.


2012 Toyota Camry 2.5 30,000 mi
2015 Chevy Silverado LT Z71 5.3 V8 30,000 mi
2010 Toyota Sienna 3.5 V6 150,000 mi
Re: Why is the new Castrol GTX not dexos1 approved? [Re: wolf_06] #4444418
06/28/17 10:45 PM
06/28/17 10:45 PM
Joined: Jun 2016
Posts: 2,992
MN
oil_film_movies Online content
oil_film_movies  Online Content
Joined: Jun 2016
Posts: 2,992
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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