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0W-16 and 0W-30 blend #5160023 07/14/19 12:09 AM
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pitzel Offline OP
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What ratios are required generally to achieve a 0W-20 viscosity by blending 0W-16 and 0W-30 oil? I have a stockpile of 0W-30 that I want to run in a 0W-20 application...


Change your thinking...not your oil!
Turn your mind....not your rotors!
Re: 0W-16 and 0W-30 blend [Re: pitzel] #5160029 07/14/19 12:17 AM
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Marco620 Offline
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Run the 0w30 as is. Forget the W16. Use up the 0w30


15' Civic 1.8 i-vtec 294000 mi QSUD 0w20 & LG Biotech, BP CVT Fluid,GUMOUT W/ PEA
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Re: 0W-16 and 0W-30 blend [Re: pitzel] #5160039 07/14/19 01:36 AM
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0w30 won’t hurt a vehicle calling for 0w20.


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Re: 0W-16 and 0W-30 blend [Re: pitzel] #5160053 07/14/19 03:01 AM
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Gasbuggy Offline
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Need about 1.5 quarts w16 to every 1 of w30 to get close to 0w20.


Cadillac CTS-V 6.2L 10w30PP
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76 Mercedes 300D Rotella T4
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Re: 0W-16 and 0W-30 blend [Re: pitzel] #5160061 07/14/19 03:47 AM
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OilUzer Offline
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your engine will appreciate the 0Wx30 much better than unkownW20
Also your friends may see you buying 0Wx16 shocked2

Re: 0W-16 and 0W-30 blend [Re: pitzel] #5160085 07/14/19 05:42 AM
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Mainia Offline
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Turn into a "thicky" and drop that light stuff. I never have and never will run anything below 0w-30 or 5w-30 as long as its available. Come on, how long have you been here. You should know going up one 10 series makes zero difference in cars available in today's market.

Re: 0W-16 and 0W-30 blend [Re: pitzel] #5160092 07/14/19 05:55 AM
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Number_35 Offline
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I agree with the other posters - I would stick with the 0W-30.

But, if I were to mix, I would go with the same manufacturer. This is the easy way to do it, but it's wrong! Read on ...

1 litre of 0W-16 mixed with 1 litre of 0W-30 would yield 2 litres of 0W-23

2 litres of 0W-16 mixed with 1 litre of 0W-30 would yield 3 litres of 0W-21.3

3 litres of 0W-16 mixed with 1 litre of 0W-30 would yield 4 litres of 0W-19.5

5 litres of 0W-16 mixed with 2 litres of 0W-30 would yield 7 litres of 0W-20

... and so on. This is not a reliable way to calculate viscosity.

Given that there's a range of viscosity for any given weight of oil, it really all depends on the manufacturer. The alleged 0W-23 (the result of a 50/50 mix) might have a viscosity that falls into the 0W-20 range. Ditto for all of the others. Let's check:

https://www.oilspecifications.org/articles/introducing-the-sae-8-and-sae-12-viscosity-grades.php

http://infomechanical.blogspot.com/2010/09/lubrication-oil-meaning-number-sea-20w.html

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

SAE 16 weight has a range of 6.1 - 8.2 cSt @ 100 C.

SAE 20 weight has a range of 5.6 - 9.3 cSt @ 100 C.

SAE 30 weight has a range of 9.3 - 12.5 cSt @ 100 C.

The overlap between SAE 16 and 20 is weird; I wonder whether they'll up the lower range of the SAE 20. As is, an oil with a viscosity anywhere from 6.1 to 8.2 could be either a 16 or 20 weight. This confusing article seems to imply that the viscosity range for SAE 20 will be raised from 5.6 to 6.9 cSt @ 100 C:

https://www.oilspecifications.org/articles/sae-16-viscosity-grade.php

Regardless,

Mobil 1's 0W-16 has a viscosity (@ 100 C) of 7.2 cSt.

Mobil 1's 0W-20 has a viscosity (@ 100 C) of 8.8 cSt.

Mobil 1's 0W-30 has a viscosity (@ 100 C) of 10.9 cSt.

If you were to mix Mobil 0W-16 and 0W-30 50:50, you'd get a viscosity of 9.05, still near the top of the SAE 20 viscosity range. If I were to mix, this is what I'd do. But, let's say you have a 5 litre sump - one bottle of M1 0w-30 and four of M1 0W-20 would give you a viscosity of 9.22, near the top of, but within, the SAE 20 range. No SAE 16-weight required!

Good question, I learned a lot going down this rabbit hole.

Re: 0W-16 and 0W-30 blend [Re: pitzel] #5160099 07/14/19 06:00 AM
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Shannow Offline
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:facepalm:

I have no idea why I visit BITOG


If it's the truth....it can handle the pressure !!!
Re: 0W-16 and 0W-30 blend [Re: pitzel] #5160104 07/14/19 06:11 AM
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The HTHS for a 0w16 is 2.3 mPa.s.

Forget the KV100 target.

How much 0w30 do you have and is it ILSAC GF or ACEA A3?

If you only have a couple litres, you could run, say, 1 litre in each sump of say 4.5L without notice.


2019 VW Jetta S 6MT OCI#2 7378mi-MOTUL Specific VW508.00+VW Service Filter; '17 Subaru Crosstrek CVT OC#8 60864mi-Subaru Idemitsu 0W20 + SOA Filter
Re: 0W-16 and 0W-30 blend [Re: Shannow] #5160106 07/14/19 06:12 AM
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Originally Posted by pitzel
What ratios are required generally to achieve a 0W-20 viscosity by blending 0W-16 and 0W-30 oil? I have a stockpile of 0W-30 that I want to run in a 0W-20 application...


What's the application?

I totally agree with simply using the 30.




Originally Posted by Shannow
:facepalm:

I have no idea why I visit BITOG


Why, because this thread is almost identical to the hundreds (?) of "How can I mix 0w20 with 0w40 to get a xxw30" threads? LOL

Me either.


I use the overseas manual to choose my viscosity.


Hers: 2008 Jeep Liberty 154k, SS 5w30/Amsoil
Looking at options.

His: 2015 4Runner 60k, SS 5w20/Amsoil

Re: 0W-16 and 0W-30 blend [Re: pitzel] #5160151 07/14/19 07:19 AM
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Originally Posted by pitzel
What ratios are required generally to achieve a 0W-20 viscosity by blending 0W-16 and 0W-30 oil? I have a stockpile of 0W-30 that I want to run in a 0W-20 application...


Most 20-weights cluster near the low end of the 30 range, so it doesn't make much difference to the fuel economy potential if the 0w30 you have is at the low end of the range.
But let's get down to specifics. What 0w30 do you have? What 0w16 do you want to mix in with it? What viscosity are you targeting? If those are known, plug the values into the Widman viscosity calculator, and find the proportions that are required.

Last edited by A_Harman; 07/14/19 07:21 AM.

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Re: 0W-16 and 0W-30 blend [Re: Shannow] #5160160 07/14/19 07:31 AM
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AZjeff Offline
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Originally Posted by Shannow
duh

I have no idea why I visit BITOG


But why not? You find the same anal-retentive stuff on any forum you visit, in this case attempting to strictly follow the oil requirements in the owner's manual by blending an approximation in the garage because 0W-30 just isn't correct. It's entertainment. Take one of your deep breaths and endeavor to persevere.

@pitzel: sell the -30 and get the right oil or you'll never sleep.


86 Samurai 1.3 leftovers
14 RAV4 2.5 5W-20 PP
18 Nissan Titan 5.6 DI, QSUD

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Re: 0W-16 and 0W-30 blend [Re: Shannow] #5160220 07/14/19 08:26 AM
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ka9mnx Online Content
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Originally Posted by Shannow
:facepalm:

I have no idea why I visit BITOG

I'm no where as intelligent as you on this stuff but some of what people come up with is obviously ridiculous.


2005 Ranger 3.0 - SuperTech Syn 5w-30/Motorcraft
2000 4Runner 3.4 - SuperTech Syn 5w-30/Toyota
1997 B2500 Van 3.9 - M1 HM 10w-30/Mopar
1993 F150 4.9 - SuperTech Syn 5w-30/Motorcraft
Re: 0W-16 and 0W-30 blend [Re: pitzel] #5160594 07/14/19 02:18 PM
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OilUzer Offline
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btw, by unknownW20 I meant that the W part will be "unknown" according to experts in several other threads ... It can potentially cause issues (rare?) if you live in cold places which seems like you do. Shannow has explained that a few times if you search.

Re: 0W-16 and 0W-30 blend [Re: Shannow] #5160641 07/14/19 03:21 PM
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CR94 Offline
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Originally Posted by Shannow
... I have no idea why I visit BITOG
Calculating 0W-21.3 isn't ridiculous enough to be entertaining?


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