Valvetrain noise

[LeoStrop]

Originally Posted by tiger862
Originally Posted by PimTac
There is no such thing as 0 weight oil as far as motor oil is concerned nor is there a 0 grade.

Here we go again.


A single-grade engine oil, as defined by SAE J300, cannot use a polymeric viscosity index improver (VII, also viscosity modifier, VM) additive. SAE J300 has established eleven viscosity grades, of which six are considered Winter-grades and given a W designation. The 11 viscosity grades are 0W, 5W, 10W, 15W, 20W, 25W, 20, 30, 40, 50, and 60. These numbers are often referred to as the "weight" of a motor oil, and single-grade motor oils are often called "straight-weight" oils.

https://en.m.wikipedia.org/wiki/Motor_oil#Single-grade



You have to remember that these grades are just a classification of the range of the viscosity, so they are not units of measurement. They classify the viscosity (which is the unit of measurement in cSt ) @40°C and @100°C.

A 20W rating will be around 150cSt while a 20 weight will be around 8 cSt.

 

[PimTac]

Chart for reference.


https://www.bobistheoilguy.com/viscosity-charts/

 

[tiger862]

Originally Posted by LeoStrop
Originally Posted by tiger862
Originally Posted by PimTac
There is no such thing as 0 weight oil as far as motor oil is concerned nor is there a 0 grade.

Here we go again.


A single-grade engine oil, as defined by SAE J300, cannot use a polymeric viscosity index improver (VII, also viscosity modifier, VM) additive. SAE J300 has established eleven viscosity grades, of which six are considered Winter-grades and given a W designation. The 11 viscosity grades are 0W, 5W, 10W, 15W, 20W, 25W, 20, 30, 40, 50, and 60. These numbers are often referred to as the "weight" of a motor oil, and single-grade motor oils are often called "straight-weight" oils.

https://en.m.wikipedia.org/wiki/Motor_oil#Single-grade



You have to remember that these grades are just a classification of the range of the viscosity, so they are not units of measurement. They classify the viscosity (which is the unit of measurement in cSt ) @40°C and @100°C.

A 20W rating will be around 150cSt while a 20 weight will be around 8 cSt.

Couldn't have said it better.

 

[kschachn]

You find that 0-grade oil yet?

 

[tiger862]

Originally Posted by kschachn
You find that 0-grade oil yet?

Yes.
0w16 0w20 0w30 (The Society of Automotive Engineers (SAE) has established a numerical code system for grading motor oils according to their viscosity characteristics. )
Some are hung up on 0=zero, nada, etc. Reality is that they use a code number not an actual value number then give it value so in Valvoline as well as other oils the 0w value=34.4. So the oil can start out with viscosity of 34.4 and end up 6.8. Grades aren't numerical values but codes for viscosity value. This is the way I interpret this. Could I be wrong sure but at least I can admit it.

 

[Mad_Hatter]

I think we're getting caught up in nomenclature..yes, technically for a multi grade lube there's both a hot and cold "grade" but nobody I know references the (w)inter rating (or grade) by itself or even as a "grade" but rather everyone I know says, "I use a 5w30". They don't say, "I use a 5w grade oil".. nobody I know says that. The only time I ever hear a single "grade" being used/mentioned is in reference to a straight grade.

 

[PimTac]

Originally Posted by tiger862
Originally Posted by kschachn
You find that 0-grade oil yet?

Yes.
0w16 0w20 0w30 (The Society of Automotive Engineers (SAE) has established a numerical code system for grading motor oils according to their viscosity characteristics. )
Some are hung up on 0=zero, nada, etc. Reality is that they use a code number not an actual value number then give it value so in Valvoline as well as other oils the 0w value=34.4. So the oil can start out with viscosity of 34.4 and end up 6.8. Grades aren't numerical values but codes for viscosity value. This is the way I interpret this. Could I be wrong sure but at least I can admit it.




That is the 0w16 you are referring to.

Looks like another one for the list.

 

[kschachn]

Originally Posted by tiger862
0w16 0w20 0w30 (The Society of Automotive Engineers (SAE) has established a numerical code system for grading motor oils according to their viscosity characteristics. )
Some are hung up on 0=zero, nada, etc. Reality is that they use a code number not an actual value number then give it value so in Valvoline as well as other oils the 0w value=34.4. So the oil can start out with viscosity of 34.4 and end up 6.8. Grades aren't numerical values but codes for viscosity value. This is the way I interpret this. Could I be wrong sure but at least I can admit it.

Yes it sure can. That's a 0-grade oil, is it?

In the summer it gets pretty warm here so I don't need much of a winter rating. I wonder when Valvoline will come out with a 10W-0 oil?

 

[CR94]

Originally Posted by tiger862
... so in Valvoline as well as other oils the 0w value=34.4. ...
What's that mean? Makes no sense to me.

 

[4WD]

Well, on Mobil 1's spec sheets … they only post MRV readings on the 0w lubes …

Otherwise … ballpark it with pour point temps for relative comparison only

 

[ZeeOSix]

Originally Posted by Mad_Hatter
The only time I ever hear a single "grade" being used/mentioned is in reference to a straight grade.


And the nomenclature used for a non multi-viscosity (straight weight) oil is "SAE 30", "SAE 40" or "SAE 50" for example.

 

[Mad_Hatter]

Originally Posted by ZeeOSix
Originally Posted by Mad_Hatter
The only time I ever hear a single "grade" being used/mentioned is in reference to a straight grade.


And the nomenclature used for a non multi-viscosity (straight weight) oil is "SAE 30", "SAE 40" or "SAE 50" for example.

Precisely..ðŸ‘

 

[SR5]

Originally Posted by painfx
I am curious why in the cold season, at start up it doesn't have valvetrain noise compared to the hot season? It actually quieter in the cold seaon. Very weird because it should be vice versa.

I am using Mobil 1 AFE 0w-16.


Maybe it's not the oil but mechanical, the valve clearances could be a bit tighter when cold, or something similar.