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Simple mixing question #4506766
09/03/17 09:31 PM
09/03/17 09:31 PM
Joined: Jul 2009
Posts: 601
texas
danez_yoda Offline OP
danez_yoda  Offline OP
Joined: Jul 2009
Posts: 601
texas
2014 sienna takes 6.4 quarts of 0w20. I have a 5 qt jug of 0w20 (PP) and a partial jug of 5W30(PP).

If I put 5qt of 0w20 and and 1.4QT of 5W30 PP what would the equivalent viscosity be? Something in the 5w20 range?

Re: Simple mixing question [Re: danez_yoda] #4506770
09/03/17 09:37 PM
09/03/17 09:37 PM
Joined: Apr 2004
Posts: 7,748
New York
pbm Online content
pbm  Online Content
Joined: Apr 2004
Posts: 7,748
New York
I don't know what the viscosity would be but I think it would be fine for use in Texas....especially since they are from the same oil family (similar additive package)....


'Journalism is Dead'
Re: Simple mixing question [Re: danez_yoda] #4506773
09/03/17 09:40 PM
09/03/17 09:40 PM
Joined: Oct 2012
Posts: 4,642
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,642
Taiwan
I guessed it wouldn't be, and it isn't.

It can't be calculated, but will be skewed toward the lower viscosity component.

Re: Simple mixing question [Re: danez_yoda] #4506775
09/03/17 09:41 PM
09/03/17 09:41 PM
Joined: Mar 2017
Posts: 5,484
...
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 5,484
...
At that ratio it would be pretty close to 0w-20. The difference will be very small.



Re: Simple mixing question [Re: danez_yoda] #4506779
09/03/17 09:47 PM
09/03/17 09:47 PM
Joined: Aug 2006
Posts: 9,815
Central Washington
Colt45ws Offline
Colt45ws  Offline
Joined: Aug 2006
Posts: 9,815
Central Washington
PP 5W30 is 10.3cSt
PP 0W20 is 8.3cSt
~78% 0W20
Mix is 8.7cSt, or in 20 grade range.
The W rating is harder to calculate becuase they are done at different temperatures.. IT may or may not fail a 0W test run in a lab. My gut instinct is that it would be super border on 0W/5W

Ref:
http://www.pennzoil.com/en_us/products/f...c-Motor-Oil.pdf
http://www.pennzoil.com/en_us/products/f...c-Motor-Oil.pdf
http://www.widman.biz/English/Tables/J300.html
http://www.widman.biz/English/Calculators/Mixtures.html


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2
Re: Simple mixing question [Re: danez_yoda] #4506797
09/03/17 09:57 PM
09/03/17 09:57 PM
Joined: Oct 2010
Posts: 1,784
.
Danh Offline
Danh  Offline
Joined: Oct 2010
Posts: 1,784
.
You can Google "Widman Calculator" to determine the viscosity of a blend of two oils. You'll have to know the product specs to do this, but you can find them on Pennzoil's website.

But, as Pennzoil motor oils tend to be on the light side of a viscosity range, the mixture you're talking about will almost surely be in the 20- weight grade at 100C. Keep in mind that a viscosity specification allows a range of viscosities to qualify. For example, a 20-weight oil at 100C can have a viscosity of between 6.9 and 9.2 cenistokes (cSt), but most oils are in the 8.0-9.0 range. I'd guess your proposed mixture would wind up at around 8.6, or about like a typical 20-weight.

Re: Simple mixing question [Re: Ducked] #4506895
09/04/17 01:19 AM
09/04/17 01:19 AM
Joined: Dec 2016
Posts: 6,270
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,270
Waco, TX
Originally Posted By: Ducked

It can't be calculated, but will be skewed toward the lower viscosity component.


Shannow posted something a couple months ago.

Apparently, it gets skewed to the high viscosity components.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Simple mixing question [Re: Colt45ws] #4506896
09/04/17 01:20 AM
09/04/17 01:20 AM
Joined: Dec 2016
Posts: 6,270
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,270
Waco, TX
Originally Posted By: Colt45ws

The W rating is harder to calculate becuase they are done at different temperatures.


He's in Texas.... Effectively, he can ignore the W numbers. Even on those cold snap days up in the panhandle that happen a few days each winter.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Simple mixing question [Re: Colt45ws] #4507113
09/04/17 10:20 AM
09/04/17 10:20 AM
Joined: Oct 2012
Posts: 4,642
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,642
Taiwan
Originally Posted By: Colt45ws
PP 5W30 is 10.3cSt
PP 0W20 is 8.3cSt
~78% 0W20
Mix is 8.7cSt, or in 20 grade range.
The W rating is harder to calculate becuase they are done at different temperatures.. IT may or may not fail a 0W test run in a lab. My gut instinct is that it would be super border on 0W/5W

Ref:
http://www.pennzoil.com/en_us/products/f...c-Motor-Oil.pdf
http://www.pennzoil.com/en_us/products/f...c-Motor-Oil.pdf
http://www.widman.biz/English/Tables/J300.html
http://www.widman.biz/English/Calculators/Mixtures.html


Sorry, I shouldn't have said it can't be calculated, but its my understanding that for multigrades it can't be calculated with much confidence in the accuracy of the result.

Re: Simple mixing question [Re: danez_yoda] #4507118
09/04/17 10:23 AM
09/04/17 10:23 AM
Joined: Oct 2014
Posts: 11,865
Idaho
CT8 Online content
CT8  Online Content
Joined: Oct 2014
Posts: 11,865
Idaho
You will end up with a blend of 5 qts 0W-20 and 1.4 Qts of 5W-30.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Simple mixing question [Re: danez_yoda] #4507122
09/04/17 10:30 AM
09/04/17 10:30 AM
Joined: Jan 2017
Posts: 331
Texas,USA
ATex7239 Offline
ATex7239  Offline
Joined: Jan 2017
Posts: 331
Texas,USA
Oil is cheap, engines aren't. I don't think 1 or 2 quarts of full synthetic is going to sway anyone's finances one way or another, but a damaged engine might.

I used to mix oils all the time. But now with modern engines, I don't think it's worth the risk.


'12 Buick Enclave 139,xxx
Valvoline ML SynBlend 5w30
ACDelco PF63E

'17 Ford Fusion (Company Lease) 42,xxx
Oil Don't know
Filter Don't care
Re: Simple mixing question [Re: Linctex] #4507125
09/04/17 10:36 AM
09/04/17 10:36 AM
Joined: Oct 2012
Posts: 4,642
Taiwan
Ducked Offline
Ducked  Offline
Joined: Oct 2012
Posts: 4,642
Taiwan
Originally Posted By: Linctex
Originally Posted By: Ducked

It can't be calculated, but will be skewed toward the lower viscosity component.


Shannow posted something a couple months ago.

Apparently, it gets skewed to the high viscosity components.


That's the sort of thing I could get the wrong way around, but I doubt Molakule would be agreeing with me if I did.

https://bobistheoilguy.com/forums/ubbthreads.php/topics/4279826/Ducked#Post4279826

Re: Simple mixing question [Re: danez_yoda] #4507142
09/04/17 10:57 AM
09/04/17 10:57 AM
Joined: Oct 2005
Posts: 7,094
Colorado
Kuato Offline
Kuato  Offline
Joined: Oct 2005
Posts: 7,094
Colorado
Approximately 1.09w22.18. grin

Just run it.

Last edited by Kuato; 09/04/17 10:58 AM.

Thick vs Thin test: 15k / 43k miles complete
Re: Simple mixing question [Re: danez_yoda] #4507152
09/04/17 11:07 AM
09/04/17 11:07 AM
Joined: Mar 2004
Posts: 20,764
Upstate NY
Donald Offline
Donald  Offline
Joined: Mar 2004
Posts: 20,764
Upstate NY
Use the right oil and save the partial oil for your mower.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Simple mixing question [Re: danez_yoda] #4507359
09/04/17 04:09 PM
09/04/17 04:09 PM
Joined: Sep 2009
Posts: 16,027
OH
fdcg27 Offline
fdcg27  Offline
Joined: Sep 2009
Posts: 16,027
OH
While there is no way of really knowing, my guess is that you'll end up with an oil that'll be of the 5W-20 grade.
Many of us were adamantly opposed to mixing until Sonofjoe posted a reply in another thread that put most of our concerns to rest.
Nothing weird will happen with this mix and it seems convenient for you.
It's not as though a 0W qualified oil is needed in Texas or just about anywhere else in the lower forty eight.


17 Forester 18K VME 0W-20
12 Accord LX 92K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i
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