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VOA Castrol GTX Conventional 5w20 #4483036
08/08/17 06:41 PM
08/08/17 06:41 PM
Joined: Apr 2012
Posts: 292
Michigan
researcher Offline OP
researcher  Offline OP
Joined: Apr 2012
Posts: 292
Michigan
I know I'm not here a lot, but been doing research for my 96 Civic 1.6L SOHC. I've wanted to change to another oil since the Toyota brand 5w20 I was using was thinning out too quickly. And civic engines are easy on oil! I've picked Castrol GTX Conventional 5w20 to try and did a VOA to find out what it was starting with.

Also, looks like the specs tested here are very close to the specs Castrol has on their data sheet, wanted to keep them honest.

Batch tested: Date code 16343, 2016, 343rd day.

Any comments? Feel free to post.. Enjoy cool



Last edited by researcher; 08/08/17 06:42 PM.
Re: VOA Castrol GTX Conventional 5w20 [Re: researcher] #4483052
08/08/17 06:56 PM
08/08/17 06:56 PM
Joined: Jul 2015
Posts: 3,772
MD
AirgunSavant Offline
AirgunSavant  Offline
Joined: Jul 2015
Posts: 3,772
MD
Why is it on target for a 5w30???

Re: VOA Castrol GTX Conventional 5w20 [Re: researcher] #4483055
08/08/17 06:59 PM
08/08/17 06:59 PM
Joined: Aug 2017
Posts: 558
Nebraska
BJD78 Offline
BJD78  Offline
Joined: Aug 2017
Posts: 558
Nebraska
Any 5w20 oil that has the API certification and starburst on the bottle is going to be a fine oil. Castrol has it, so it is as good as any other brand. one can split hairs with oil and which brand is better all day, but in the end if an oil meets the API certification then it is a good quality oil. Some people on here like to switch brands while others have stringent brand loyalty, while many others, like me just use the right weight per the owner manual and the cheapest brand we can get as long as it has the API. I have not seen any oil that does not for a long time. http://www.api.org/~/media/files/certification/engine-oil-diesel/publications/mom_guide_english_2013.pdf

Last edited by BJD78; 08/08/17 07:09 PM.

2010 Forester:122K
2009 Sonata :189K
2010 Tucson:55K

OCI 5K using the cheapest dino oil I can buy,usually NAPA or TSC Travelers oil.
Re: VOA Castrol GTX Conventional 5w20 [Re: AirgunSavant] #4483056
08/08/17 06:59 PM
08/08/17 06:59 PM
Joined: Oct 2004
Posts: 8,308
Cincinnati, OH, USA
bullwinkle Offline
bullwinkle  Offline
Joined: Oct 2004
Posts: 8,308
Cincinnati, OH, USA
Originally Posted By: AirgunSavant
Why is it on target for a 5w30???
That's a typo, the upper range for 20 weight at 100 C. is 9.3-9.7, it's well in range at 9.02.


06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)
Re: VOA Castrol GTX Conventional 5w20 [Re: researcher] #4483094
08/08/17 07:38 PM
08/08/17 07:38 PM
Joined: Jul 2016
Posts: 1,682
Jacksonville, FL
FlyNavyP3 Offline
FlyNavyP3  Offline
Joined: Jul 2016
Posts: 1,682
Jacksonville, FL
Nice dose of boron in this sample. Looks suitable for use to me.


Luke
P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander
Re: VOA Castrol GTX Conventional 5w20 [Re: researcher] #4483117
08/08/17 08:00 PM
08/08/17 08:00 PM
Joined: Feb 2011
Posts: 2,049
California
Stelth Offline
Stelth  Offline
Joined: Feb 2011
Posts: 2,049
California
Thanks for posting this. Nice to see current data.


Experts are often wrong, but rarely in doubt.
Re: VOA Castrol GTX Conventional 5w20 [Re: Stelth] #4483224
08/08/17 10:59 PM
08/08/17 10:59 PM
Joined: Apr 2012
Posts: 292
Michigan
researcher Offline OP
researcher  Offline OP
Joined: Apr 2012
Posts: 292
Michigan
Originally Posted By: FlyNavyP3
Nice dose of boron in this sample. Looks suitable for use to me.


thanks! Yeah after diving in for all the research I thought it was looking good too.


Originally Posted By: Stelth
Thanks for posting this. Nice to see current data.


That's exactly why I was posting it. Looked through all the VOA's and never found this. Was relying on Castrol's spec sheet. Was looking to use it in my 96 Civic 1.6L. After much research decided on this after I got the Blackstone results back. Had to see what was in it, beyond the Castrol spec sheet.

When looking for this oil, I did notice a lot of OLD date codes on the shelf, 15, 12! No thanks not buying 5 year old oil from Oreilly! Castrol has changed many of their formulas, and for the better in the past year or so. So buy the new date codes!

For anyone wanting this, look on the back of the bottle, look for the first 5 digits.. first two are the year, the next three are the day of the year. This analysis is for date code 16343.

Re: VOA Castrol GTX Conventional 5w20 [Re: researcher] #4483307
08/09/17 04:44 AM
08/09/17 04:44 AM
Joined: Mar 2017
Posts: 6,486
...
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 6,486
...
I ran a Mitsubishi 4 cylinder engine for 16 years straight on a diet of GTX. No problems and it looked clean when the covers came off for tappet adjusting. Only the light amber gold color which Castrol seems to do anyway.

Last edited by PimTac; 08/09/17 04:45 AM.

Cannot see signatures any longer so it doesn’t matter.
Re: VOA Castrol GTX Conventional 5w20 [Re: researcher] #4483334
08/09/17 05:30 AM
08/09/17 05:30 AM
Joined: Aug 2015
Posts: 2,916
NC
BigD1 Offline
BigD1  Offline
Joined: Aug 2015
Posts: 2,916
NC
http://pqiadata.org/Castrol_GTX_5W20.html

From March of this year.

Thanks for posting test results. thumbsup


1992 Toyota Pickup--Harvest King Premium 10W-30--Fram PH3614
Re: VOA Castrol GTX Conventional 5w20 [Re: researcher] #4483672
08/09/17 11:36 AM
08/09/17 11:36 AM
Joined: Sep 2005
Posts: 14,360
Canada
addyguy Offline
addyguy  Offline
Joined: Sep 2005
Posts: 14,360
Canada
Thanks for posting. GTX is a strong oil, lots of additives and nice high TBN. Good to see.


2010 Kia Soul 2U - 2.0L I-4, auto; 137k miles.
M1 EP 10W-30; OEM Kia filter.
Re: VOA Castrol GTX Conventional 5w20 [Re: BigD1] #4484518
08/10/17 09:07 AM
08/10/17 09:07 AM
Joined: Apr 2012
Posts: 292
Michigan
researcher Offline OP
researcher  Offline OP
Joined: Apr 2012
Posts: 292
Michigan
Originally Posted By: addyguy
Thanks for posting. GTX is a strong oil, lots of additives and nice high TBN. Good to see.


hey you're most welcome. I'm also going to be trying the GTX 5w30 for my other car, and I'll be posting up a VOA of that soon.

Originally Posted By: PimTac
I ran a Mitsubishi 4 cylinder engine for 16 years straight on a diet of GTX. No problems and it looked clean when the covers came off for tappet adjusting. Only the light amber gold color which Castrol seems to do anyway.


That's great news! Glad I chose wisely! I'm using it on my 96 civic 1.6L and so far it has made the engine quieter, and just seems less "strained". I did see the light amber gold color too.

Originally Posted By: BigD1
http://pqiadata.org/Castrol_GTX_5W20.html

From March of this year.

Thanks for posting test results. thumbsup


I did see that at PQIA, thanks for including the link. I did the lab test even though PQIA had their data because I wanted to see what was on the shelf around here. The results are similar but my test showed much lower phosphorus, everything else was similar. you're welcome for the post.

I've always seen lots of the same stuff being posted mainly the most popular sythnetic or semi-blend, no attention was being paid to a regular conventional. hopefully it'll help others looking for a good conventional. smile

Last edited by researcher; 08/10/17 09:08 AM.
Re: VOA Castrol GTX Conventional 5w20 [Re: researcher] #4484987
08/10/17 05:25 PM
08/10/17 05:25 PM
Joined: Mar 2016
Posts: 1,557
Toronto
PeterPolyol Online content
PeterPolyol  Online Content
Joined: Mar 2016
Posts: 1,557
Toronto
Looks like GTX is off the Sodium now?

Thanks for the analysis


Scambling for solutions is a hopelessly futile endeavour and potentially dangerous, without first coming to a solid, personal understanding of the problem. Beware riding the ideological hobby horse.
Re: VOA Castrol GTX Conventional 5w20 [Re: PeterPolyol] #4485775
08/11/17 12:55 PM
08/11/17 12:55 PM
Joined: Apr 2012
Posts: 292
Michigan
researcher Offline OP
researcher  Offline OP
Joined: Apr 2012
Posts: 292
Michigan
UPDATE

Ended up contacting BP/Castrol about the 5w30 version of GTX since I couldn't find any data sheets on their website.

Castrol has told me they have DISCONTINUED the regular GTX and replaced it with GTX ULTRACLEAN. It's a synthetic blend. So here I went to all the expense of getting a VOA on a discontinued oil! crackmeup duh

had to update for everyone else, looks like I have to go find some 5w20 and 5w30 Ultraclean to do a VOA.

Originally Posted By: PeterPolyol
Looks like GTX is off the Sodium now?

Thanks for the analysis


you're welcome for the analysis, and yeah even over at PQIA (link above) shows the sodium is gone. Castrol has been quickly changing a lot of their formulations, and for the better, I'd say!

Last edited by researcher; 08/11/17 12:56 PM.
Re: VOA Castrol GTX Conventional 5w20 [Re: researcher] #4485976
08/11/17 05:11 PM
08/11/17 05:11 PM
Joined: Jul 2012
Posts: 2,561
South Carolina
alarmguy Offline
alarmguy  Offline
Joined: Jul 2012
Posts: 2,561
South Carolina
New ultra clean, new formula, no track record and weaker film strength.

But yeah, I'd be upset too if I just had a VOA done on the old stuff!
I actually returned a jug of 20w50 that I bought for my bike when I read about the change, even though no evidence of changing the 20/50 yet, I just moved onto another brand, not wanting to mess around.

OK and, well, truth is my wife returned it for me... :o)


14 Road King (current)
08 VStar 1300 Tourer
07 Suzuki C50
Re: VOA Castrol GTX Conventional 5w20 [Re: alarmguy] #4487433
08/13/17 01:39 PM
08/13/17 01:39 PM
Joined: Apr 2012
Posts: 292
Michigan
researcher Offline OP
researcher  Offline OP
Joined: Apr 2012
Posts: 292
Michigan
Originally Posted By: alarmguy
New ultra clean, new formula, no track record and weaker film strength.

But yeah, I'd be upset too if I just had a VOA done on the old stuff!
I actually returned a jug of 20w50 that I bought for my bike when I read about the change, even though no evidence of changing the 20/50 yet, I just moved onto another brand, not wanting to mess around.

OK and, well, truth is my wife returned it for me... :o)


While I can agree it's a new formula and no track record since it's new. I can't just agree that it has a weaker film strength. No data to support that yet. I did look at the specs of the new Ultraclean and it looks extremely similar to what it is replacing. I'll probably be the test subject when I switch my tC over to ultraclean 5w30 from the Toyota stuff I have been using. Not liking how thin that Toyota/Mobil stuff was getting.

ahh, so you returned a 20w50 Castrol because of the new change. Yeah I can see your point. I'm going to be sending in a VOA this week for the Ultraclean 5w30, would like to see exactly what it is.

hey that's nice of your wife to return that for ya! grin

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