Valvoline Restore and Protect

That’s true. I suppose it’s more of an issue with high volatility oils creating deposits in the first place, but not every engine will suddenly begin using oil just because the Noack test is on the higher end of the “passing” grade. Engines more prone to deposits? Sure. But regardless of the actual test result for Noack for Valvoline Restore and Protect, it clearly isn’t causing consumption itself. If it were, those engines getting a reduction or elimination of previous oil use would still use some, I would think. But I’m sure there is more nuance here I could be missing or specific use cases.
Sure, there are other factors involved in the creation of ring deposits. But an oil that is way more volatile can certainly contribute to what goes on with the ring pack deposits. The ILSAC, API, GM dexos and ACEA specifications have set the max limits for Noack (15% or 13%) most likely based on the kinds of deposits they see in the qualification testing of motor oils. Higher Noack can also contribute to more intake valve deposits as the vapors get sucked through the PCV system and into the intake manifold to then go past the intake valves to condense and leave deposits.
 
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I think way back when Dr Noack toyed with this - engines were allowed to release vapors - much different than today’s pollution controlled systems …
That was one reason along this other reasons. Oil thickening and oil consumption back in those days was an important factor. I'd like to know what the typical Noack was back in the 1930s - 1940s. Edit - Mr. Roboto says the Noack back in those days was 20% to 30%.

A closed PCV system will send oil vapors to the intake manifold and intake valves. A lower Noack oil should produce less oil vapors when hitting hot areas like the bottom of the pistons and ring pack.
 
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ahh the old road draft tube... :LOL:
Yep. Jeepers with the MB OM642 Diesel engine think they invented the draft tube as a substitution for the unnecessary catch cans they like to install. They call it an Elephant Tube. I say unnecessary because if they replace the worn out puck on the head their oil consumption via the PCV will stop. But they laughed at me and said the rubber seal that rides on the end of the cam doesn't wear out. :ROFLMAO:
 
I think it was stated here when there was some video that was posted on here where this person visited the Valvoline area and they talked about Valvoline Restore and Protect!
Thank you. That is an extremely helpful post with lots of important details.
He talks about this video:
Inside Valvoline's Secret R&D Laboratory to Uncover the Truth
Here the Valvoline chief technology officer Roger Dale England, PhD (LinkedIn) mentions that the molecule that does the cleaning in the Valvoline Restore and Protect oil was discovered by accident in a Valvoline R&D lab in India.

 
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Sure, there are other factors involved in the creation of ring deposits. But an oil that is way more volatile can certainly contribute to what goes on with the ring pack deposits. The ILSAC, API, GM dexos and ACEA specifications have set the max limits for Noack (15% or 13%) most likely based on the kinds of deposits they see in the qualification testing of motor oils. Higher Noack can also contribute to more intake valve deposits as the vapors get sucked through the PCV system and into the intake manifold to then go past the intake valves to condense and leave deposits.
Very true. It’s not a useless test, just that it could be perhaps even better at finding a correlation to = definitely will deposit or consume more. It’s a “likely” sort of result but perhaps not a guaranteed outcome for all use cases?

The limits you noted are those acceptable thresholds (15% vs 13%)

Ideally, if you get a better score on the Noack, obviously volatility at lower temps is even better. That’s kind’ve the point or thought I had in wishing Noack were a little more accurate at predicting.

For example, what if a 15% Noack tested oil actually did much better at the 180 C threshold than another oil that tested 15% at 250 C but did worse than the former down at 180 C. I suppose that’s what I’m getting at but regardless Noack is the number we have and ideally below 10% is considered among the better. Interestingly, if the vapor of Valvoline Restore and Protect can clean, wasn’t it speculated that it might clean up intake and PCV systems over time? The irony if so! 😅

Edited: ADHD brain 🫠
 
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For example, what if a 15% Noack tested oil actually did much better at the 180 C threshold than another oil that tested 15% at 250 C but did worse than the former down at 180 C.
Don't know if that's possible even in a controlled lab setting, and if so how common? Lots of factors involved wrt to the oil vaporizing level when oil is running in a real engine on the streets based on engine design and use conditions.
 
Before switching to Valvoline Restore and Protect 5W-30 on my BIL’s 2009 Camry (2AZ), he was using Chevron Supreme 20w-50. Was there anything higher than 20W-50?
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Before switching to Valvoline Restore and Protect 5W-30 on my BIL’s 2009 Camry (2AZ), he was using Chevron Supreme 20W-50. Was there anything higher than 20W-50?
That tells me the 2AZ-FE is a great oil burner. Valvoline Restore and Protect may help a lot in that case. What state he was driving with 20W-50?
 
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