Are you a chemist? Your equivocation of two different statements is troublesome to me. OP should try Kreen.
Oil for maximum cleaning?
- Thread starter Elkins45
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I started this thread back in January. It’s improved a lot since then.
Read GM service bulletin TSB# 10-06-01-008M:
https://f01.justanswer.com/ebrock63...il+Consumption,+MIL+ON,+Engine+Runs+Rough.pdf
for fixing stuck oil control rings and oil consumption. Our 2007 gasoline 6.2L all aluminum L92 in our 07 Yukon Denali w/130k miles had this problem when we purchased it used. I used Gunk brand Motor Medic, not the GM TSB stuff, and did the piston/combustion chamber soak over a weekend through the spark plug holes. I moved the crankshaft back and forth a few times with the balancer bolt.
Engine now has 178k miles and doesn't consume any oil between extended changes.
It should be, since it's called Ultraclean
Check out the VOA
Castrol GTX Ultraclean 5w30 VOA
Here is the VOA of Castrol's new GTX Ultraclean 5w30 oil. I believe they have added group III to this as the technical data sheet now says "synthetic blend". It looks very close to the older GTX formulation if not a little thicker viscosity. I know that PQIA hasn't tested this oil yet, but...
bobistheoilguy.com
I would do the job right mechanically. But AFAIK, HDEOs are better fit for this task.
How does a VOA show an oil has better cleaning vs not?
For me it was the high Calcium levels. Calcium is a detergent. Typically it's around 1200ppm but in the Ultraclean VOA it's 2451.
OVERKILL
$100 Site Donor 2021
Detergents don't really "clean", their forte is keeping things clean by neutralizing acids and preventing particulate and contaminants from plating out. They work with dispersants, which prevent agglomeration, which of course can also lead to them falling out of suspension.
For actual cleaning, you need AN's or esters; something polar that can actively work to free deposits from surfaces.
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I put a couple of squirts of Dawn in the crankcase. Next oil change comes out spotless.
Okay, cool. Good to know.
So let me rephrase that then. It's called Ultraclean and it advertises: "Its double-action formula has been proven to clean away the sludge that can block engine oilways* and helps prevent new sludge formation". What stands out in its VOA is much higher than normal Calcium, which is a detergent.
From what I’ve read here at BITOG I’d be inclined to go with M1 0w30 or 0w40
That’s my understanding as well
OVERKILL
$100 Site Donor 2021
Right, but you can't see any of the base oil blend.
Let's look at it this way:
If this oil has a splash of AN's or esters in it, to provide a bit of cleaning ability, then its detergent/dispersant package is also going to have to be more robust to deal with those contaminants as they are freed from surfaces and enter the oil stream. Ergo, in that context, the higher levels of calcium make sense.
What do you mean? A high based calcium sulfonate detergent additive contains calcium alkylbenzene sulfonate and calcium carbonate basic salt with the formula [R-SO3]2Ca(CaCO3)n. Same with magnesium. The root is the carbonate as the neutralizing agent. My statement is an attempt to simplify the function of the calcium and magnesium that shows up in a VOA/UOA. Perhaps a bit too oversimplified.
I am not a chemist.
I was a chemist. Your statements were factually wrong, whatever their intentions. That is all. Have a good day.
Comparing tums for neutralizing acid in one’s stomach to overbased calcium sulfonate neutralizing acid in your crankcase is actually an analogy I use when explaining titration for base number doing lab tours. It is a great way to connect something common for which people are more likely to remember.
And on topic, AN’s and Esters are your friend if you want something that cleans.
And on topic, AN’s and Esters are your friend if you want something that cleans.
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