Oil Consumption Increase with Higher NOACK #'s ?

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JSRT4

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My car always consumes some oil, which is typical for the motor I have. I'm looking to run a 40 weight oil and my preferences are Redline 5w40 , Redline 0w40, or Amsoil 0w40. The 0w40's sound tempting to get quicker flow at start-up and still a decent high temp viscosity, but the NOACK numbers increase as well. I'm wondering if oil consumption changes very much based on NOACK numbers for oils such as these ?.

Redline 5w40 is 6%, going to Redline 0w40 bumps it up to 9%. Amsoil is at 8.1%. If consumption is not drastically related to a 2-3% increase in NOACK then I'd like to run the 0w40's, if consumption does increase then the 5w40 is still a good consideration. My car is used 3 seasons only, it gets put away for winter, but early spring and late fall can see some cooler temps.

Thanks for reading and any replies.

Thanks for any opinions on this.
 
I can't see putting expensive boutique oil on an oil burner. Perhaps ROTELLA T6 which is a fine oil at a much lower price might help. Try it and see if it helps.
 
Last edited:
Pennzoil Platinum 10w30 is 4.7. You're probably overthinking this a little. There's more to oil consumption than NOACK.
 
Originally Posted By: Ga129
Originally Posted By: JSRT4

My car is used 3 seasons only, it gets put away for winter, but early spring and late fall can see some cooler temps.



How low is cooler temps?


Being in Canada, early spring temps can hover around 50 degrees (April), late fall temps (October-November) the same. Hot summer weather in the 90's and high 80's quite often.
 
Originally Posted By: HerrStig
I can't see putting expensive boutique oil on an oil burner. Perhaps ROTELLA T6 which is a fine oil at a much lower price might help. Try it and see if it helps.


Thanks for the tip, I didn't consider that oil, but I will look at their specs, I've always heard good things about Rotella .
 
Originally Posted By: hatt
Pennzoil Platinum 10w30 is 4.7. You're probably overthinking this a little. There's more to oil consumption than NOACK.


Yeah that's what I was kind of getting at with my question, if oil consumption is highly affected by NOACK #'s. The small change in NOACK might not amount to much if other factors are at play.

You are probably right in that I am overthinking this, I seem to do that quite a bit, lol.
 
Originally Posted By: JSRT4
Originally Posted By: HerrStig
I can't see putting expensive boutique oil on an oil burner. Perhaps ROTELLA T6 which is a fine oil at a much lower price might help. Try it and see if it helps.


Thanks for the tip, I didn't consider that oil, but I will look at their specs, I've always heard good things about Rotella .


What specs are you looking for? Its a great oil for a wide range of applications, and its a great value. You really don't need to analyze numbers when it comes to choosing an oil.
 
the Noack increase points to the use of lighter base oils, and that's what will likely increase consumption

with temperatures in the 50s you don't need a 0w oil though, you could run a straight 40.
 
Noack less than 15% is acceptable - API SN
Noack less than 13% is good - ACEA A3/B4, C3, E7, E9
Noack less than 10 % is great - MB 229.5

You have no problems with any of the oils you are considering.
Probably quite a few others also worth considering, including some HDEOs.

With a 3 seasons car you don't need a 0W, since you don't drive in winter.
 
Originally Posted By: JSRT4
My car always consumes some oil, which is typical for the motor I have. I'm looking to run a 40 weight oil and my preferences are Redline 5w40 , Redline 0w40, or Amsoil 0w40. The 0w40's sound tempting to get quicker flow at start-up and still a decent high temp viscosity, but the NOACK numbers increase as well. I'm wondering if oil consumption changes very much based on NOACK numbers for oils such as these ?.

Redline 5w40 is 6%, going to Redline 0w40 bumps it up to 9%. Amsoil is at 8.1%. If consumption is not drastically related to a 2-3% increase in NOACK then I'd like to run the 0w40's, if consumption does increase then the 5w40 is still a good consideration. My car is used 3 seasons only, it gets put away for winter, but early spring and late fall can see some cooler temps.

Thanks for reading and any replies.

Thanks for any opinions on this.

If you can keep the NOACK under 9 or 10% or so, evaporative contribution to the oil consumption will be negligible or small under virtually all conditions. Therefore, if your NOACK is lower than 9 or 10%, you have nothing to worry about.

Here is a paper that you can study (PDF link).

If NOACKs are below 9 or 10%, I would base the selection on viscosimetric qualities such as HTHSV, VI, KV100, KV40, and general oil quality, including the VII quality. Some 0Ws are good but some of them are not. For example, I would prefer M1 5w30 or M1 EP 5w30 over M1 AFE 0w30 because of worse viscosimetric properties of M1 0w30 than M1 5w30. However, M1 0W-40 is an excellent oil (9% or less NOACK with great additive package), beating M1 TDT 5W-40. So, there is no general rule on whether 0W- or 5W- is better.

xW-40 will definitely reduce the oil consumption over xW-30 a lot because you won't get as much oil transported through the valve guides and piston rings.
 
Originally Posted By: Gokhan
If NOACKs are below 9 or 10%, I would base the selection on viscosimetric qualities such as HTHSV, VI, KV100, KV40, and general oil quality, including the VII quality.


+1
 
Having no knowledge of Rotella in the past I wasn't sure what viscosity it was, I just hear it referred to as Rotella T6, didn't know if it was a 5w40, 10w40 or 15w40 etc., having looked at it on-line it looks good, right in the range I'm looking at.
 
Last edited:
Originally Posted By: Jetronic
the Noack increase points to the use of lighter base oils, and that's what will likely increase consumption

with temperatures in the 50s you don't need a 0w oil though, you could run a straight 40.


Thanks for the reply, the lighter base oil reference makes sense, thanks for the info. . I'll probably skip the 0w oils then if not really needed.
 
Originally Posted By: SR5
Noack less than 15% is acceptable - API SN
Noack less than 13% is good - ACEA A3/B4, C3, E7, E9
Noack less than 10 % is great - MB 229.5

You have no problems with any of the oils you are considering.
Probably quite a few others also worth considering, including some HDEOs.

With a 3 seasons car you don't need a 0W, since you don't drive in winter.





Thanks for that range of numbers, that helps my decision, and I will likely skip the 0w oils if not really needed based on my driving seasons.
 
Originally Posted By: Gokhan
Originally Posted By: JSRT4
My car always consumes some oil, which is typical for the motor I have. I'm looking to run a 40 weight oil and my preferences are Redline 5w40 , Redline 0w40, or Amsoil 0w40. The 0w40's sound tempting to get quicker flow at start-up and still a decent high temp viscosity, but the NOACK numbers increase as well. I'm wondering if oil consumption changes very much based on NOACK numbers for oils such as these ?.

Redline 5w40 is 6%, going to Redline 0w40 bumps it up to 9%. Amsoil is at 8.1%. If consumption is not drastically related to a 2-3% increase in NOACK then I'd like to run the 0w40's, if consumption does increase then the 5w40 is still a good consideration. My car is used 3 seasons only, it gets put away for winter, but early spring and late fall can see some cooler temps.

Thanks for reading and any replies.

Thanks for any opinions on this.

If you can keep the NOACK under 9 or 10% or so, evaporative contribution to the oil consumption will be negligible or small under virtually all conditions. Therefore, if your NOACK is lower than 9 or 10%, you have nothing to worry about.

Here is a paper that you can study (PDF link).

If NOACKs are below 9 or 10%, I would base the selection on viscosimetric qualities such as HTHSV, VI, KV100, KV40, and general oil quality, including the VII quality. Some 0Ws are good but some of them are not. For example, I would prefer M1 5w30 or M1 EP 5w30 over M1 AFE 0w30 because of worse viscosimetric properties of M1 0w30 than M1 5w30. However, M1 0W-40 is an excellent oil (9% or less NOACK with great additive package), beating M1 TDT 5W-40. So, there is no general rule on whether 0W- or 5W- is better.

xW-40 will definitely reduce the oil consumption over xW-30 a lot because you won't get as much oil transported through the valve guides and piston rings.


Awesome information, thanks very much for the reply and link, and recommendations.
 
Originally Posted By: Gokhan
Originally Posted By: JSRT4
My car always consumes some oil, which is typical for the motor I have. I'm looking to run a 40 weight oil and my preferences are Redline 5w40 , Redline 0w40, or Amsoil 0w40. The 0w40's sound tempting to get quicker flow at start-up and still a decent high temp viscosity, but the NOACK numbers increase as well. I'm wondering if oil consumption changes very much based on NOACK numbers for oils such as these ?.

Redline 5w40 is 6%, going to Redline 0w40 bumps it up to 9%. Amsoil is at 8.1%. If consumption is not drastically related to a 2-3% increase in NOACK then I'd like to run the 0w40's, if consumption does increase then the 5w40 is still a good consideration. My car is used 3 seasons only, it gets put away for winter, but early spring and late fall can see some cooler temps.

Thanks for reading and any replies.

Thanks for any opinions on this.

If you can keep the NOACK under 9 or 10% or so, evaporative contribution to the oil consumption will be negligible or small under virtually all conditions. Therefore, if your NOACK is lower than 9 or 10%, you have nothing to worry about.

Here is a paper that you can study (PDF link).

If NOACKs are below 9 or 10%, I would base the selection on viscosimetric qualities such as HTHSV, VI, KV100, KV40, and general oil quality, including the VII quality. Some 0Ws are good but some of them are not. For example, I would prefer M1 5w30 or M1 EP 5w30 over M1 AFE 0w30 because of worse viscosimetric properties of M1 0w30 than M1 5w30. However, M1 0W-40 is an excellent oil (9% or less NOACK with great additive package), beating M1 TDT 5W-40. So, there is no general rule on whether 0W- or 5W- is better.

xW-40 will definitely reduce the oil consumption over xW-30 a lot because you won't get as much oil transported through the valve guides and piston rings.


+1 Great post
thumbsup2.gif
 
I think you have nothing to worry about with the oils you use, IMO it's difficult to find something better, although I don't know in what car they are used. Whatever the application is Red Line and Amsoil oils are among the best, so I don't see your car suffering from bad oils.
 
Originally Posted By: JSRT4
Having no knowledge of Rotella in the past I wasn't sure what viscosity it was, I just hear it referred to as Rotella T6, didn't know if it was a 5w40, 10w40 or 15w40 etc., having looked at it on-line it looks good, right in the range I'm looking at.

Just don't get it at Canadian Tire or Walmart if you can avoid it. A Shell distributor will give you a much more palatable price.
 
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