Originally Posted By: researcher
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...
)
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!
Well yeah, someone did test the film strength of the new "Ultra Clean".
In fact, it will be the one and only fact on this oil ever posted in BITOG. I already know people will trash this guy, yet, they will produce no facts on the new GTX, no one except him.
Here was his very respectable film strength on the old formula.
63. 5W30 Castrol GTX, API SN conventional = 95,392 psi
zinc = 830 ppm
phos = 791 ppm
moly = 1 ppm
This is an older version of this oil that is no longer available. See 5W30 Castrol GTX “ULTRACLEAN” below, for current capability.
Here is the new Ultra Clean -
117. 5W30 Castrol GTX “ULTRACLEAN, API SN conventional = 78,664 psi
This oil claims 50% better sludge protection than Industry standards.
zinc = TBD
phos = TBD
moly = TBD
This was the latest current version of this oil when tested Summer 2017. For reference, this oil’s wear protection capability dropped 16,728 psi, and it dropped over 50 Ranking positions, compared to the previous 5W30 Castrol GTX that was NOT called ULTRACLEAN.