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Oil Brew/Blend Calculator? #4630560
01/10/18 03:14 PM
01/10/18 03:14 PM
Joined: Dec 2016
Posts: 2,170
VA
maverickfhs Offline OP
maverickfhs  Offline OP
Joined: Dec 2016
Posts: 2,170
VA
I have seen many guys here make their own oil brew and mention, if 0W20 is mixed with 0W40 with 4/1 parts, it'll be close to 0W30 and what not terms of ratios...

Question is, how do you get that approximation of mixing blends?

Is there an online calculator for viscosity and all and for that what do I need?

Thanks for any advice and help thumbsup


2006 Civic EX 202K/AT
2006 Acura TSX 180K/AT
Re: Oil Brew/Blend Calculator? [Re: maverickfhs] #4630566
01/10/18 03:18 PM
01/10/18 03:18 PM
Joined: Jun 2016
Posts: 3,008
MN
oil_film_movies Offline
oil_film_movies  Offline
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MN
http://www.widman.biz/English/Calculators/Calculators.html

What's interesting is that its not linear.
Example: Mix an 8 cSt oil 50% with an 11 cSt and you'd think you might get right in the middle, 9.5 cSt. You don't; its actually 9.36 cSt. (KV100 there).

Last edited by oil_film_movies; 01/10/18 03:23 PM.
Re: Oil Brew/Blend Calculator? [Re: oil_film_movies] #4630574
01/10/18 03:24 PM
01/10/18 03:24 PM
Joined: Apr 2012
Posts: 9,408
Kendall, FL
wemay Offline
wemay  Offline
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Kendall, FL
Originally Posted By: oil_film_movies
http://www.widman.biz/English/Calculators/Calculators.html

What's interesting is that its not linear.
Example: Mix an 8 cSt oil 50% with an 11 cSt and you'd think you might get right in the middle, 9.5 cSt. You don't; its actually 9.36 cSt. (KV100 there).


This^


'18 KIA Sportage LX AWD 2.4L: MSS 10w30
'13 Hyundai Santa Fe Sport 2.0T: EDGE 5w30
Re: Oil Brew/Blend Calculator? [Re: oil_film_movies] #4630575
01/10/18 03:24 PM
01/10/18 03:24 PM
Joined: Feb 2014
Posts: 1,716
Texas
Dallas69 Offline
Dallas69  Offline
Joined: Feb 2014
Posts: 1,716
Texas
That's close enough for me.


2009 Galant-ultra oil and filter
1987 Ford F-150 302
Smittys 5-30
Motorcraft filter
Re: Oil Brew/Blend Calculator? [Re: maverickfhs] #4630577
01/10/18 03:24 PM
01/10/18 03:24 PM
Joined: Jan 2008
Posts: 10,707
OH
SatinSilver Offline
SatinSilver  Offline
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Posts: 10,707
OH
Originally Posted By: maverickfhs
I have seen many guys here make their own oil brew and mention, if 0W20 is mixed with 0W40 with 4/1 parts, it'll be close to 0W30 and what not terms of ratios...


I'm coming up with a 24 wt.

4x20 and 1x40 = 120

Divide that by 5 = 24.

When doing a blend to keep things stable I would only mix in one part of a different oil ideally. And stick to the same manufacturer and type if possible.

Re: Oil Brew/Blend Calculator? [Re: maverickfhs] #4630580
01/10/18 03:26 PM
01/10/18 03:26 PM
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Posts: 2,170
VA
maverickfhs Offline OP
maverickfhs  Offline OP
Joined: Dec 2016
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VA
Thanks, is there any place where actual weights can be plugged in directly?

Like 20% of 20W50, 40% of 10W30 and 40% of 0W40, I am just curious, nothing crazy here smile


2006 Civic EX 202K/AT
2006 Acura TSX 180K/AT
Re: Oil Brew/Blend Calculator? [Re: maverickfhs] #4630588
01/10/18 03:28 PM
01/10/18 03:28 PM
Joined: Jun 2016
Posts: 3,008
MN
oil_film_movies Offline
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MN
maverickfhs, No, I haven't seen anything where you put the SAE grades in directly.
You have to work with the actual cSt at 100 deg C or 40 deg C on the Widman tool.
This is probably because the J300 SAE viscosity tables allows a range of viscosities within a particular grade.

Re: Oil Brew/Blend Calculator? [Re: SatinSilver] #4630591
01/10/18 03:31 PM
01/10/18 03:31 PM
Joined: Oct 2002
Posts: 36,321
Great Lakes
Quattro Pete Offline
Quattro Pete  Offline
Joined: Oct 2002
Posts: 36,321
Great Lakes
Originally Posted By: SatinSilver
Originally Posted By: maverickfhs
I have seen many guys here make their own oil brew and mention, if 0W20 is mixed with 0W40 with 4/1 parts, it'll be close to 0W30 and what not terms of ratios...


I'm coming up with a 24 wt.

4x20 and 1x40 = 120

Divide that by 5 = 24.

When doing a blend to keep things stable I would only mix in one part of a different oil ideally. And stick to the same manufacturer and type if possible.

Since the grades are just ranges, it's not particularly useful to employ them to calculate blended viscosity. It's much better to use actual viscosities of both oils in these calculations.


'02 530i (Edge 0W-40)
'15 Q5 3.0T (Edge 5W-40)
'18 Charger SRT (FF)
Re: Oil Brew/Blend Calculator? [Re: maverickfhs] #4630595
01/10/18 03:35 PM
01/10/18 03:35 PM
Joined: Jun 2016
Posts: 3,008
MN
oil_film_movies Offline
oil_film_movies  Offline
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MN
Take your example of mixing 4/1, mostly 0w20. That is 0w40 at 20%. Say both Mobil1.
Widman: plug in 8.7 cSt at 80% and 12.9 at 20% at 100 deg C. Result: 9.39 cSt.
Then notice its a "light" 0w30 since "30 weight SAE" is defined as 9.3 to 12.5 cSt.

The zeroW part is probably intact, as its a pumping requirement, and both 0w40 and 0w20 grades are typically made from light base oils (relative to their 5w cousins).

Re: Oil Brew/Blend Calculator? [Re: maverickfhs] #4630596
01/10/18 03:36 PM
01/10/18 03:36 PM
Joined: Oct 2002
Posts: 36,321
Great Lakes
Quattro Pete Offline
Quattro Pete  Offline
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Posts: 36,321
Great Lakes
Originally Posted By: maverickfhs
Thanks, is there any place where actual weights can be plugged in directly?

That would be kind of pointless because each grade represents a fairly wide range of possible viscosities.


'02 530i (Edge 0W-40)
'15 Q5 3.0T (Edge 5W-40)
'18 Charger SRT (FF)
Re: Oil Brew/Blend Calculator? [Re: oil_film_movies] #4630600
01/10/18 03:37 PM
01/10/18 03:37 PM
Joined: Dec 2016
Posts: 2,170
VA
maverickfhs Offline OP
maverickfhs  Offline OP
Joined: Dec 2016
Posts: 2,170
VA
Originally Posted By: oil_film_movies
Take your example of mixing 4/1, mostly 0w20. That is 0w40 at 20%. Say both Mobil1.
Widman: plug in 8.7 cSt at 80% and 12.9 at 20% at 100 deg C. Result: 9.39 cSt.
Then notice its a "light" 0w30 since "30 weight SAE" is defined as 9.3 to 12.5 cSt.

The zeroW part is probably intact, as its a pumping requirement, and both 0w40 and 0w20 grades are typically made from light base oils (relative to their 5w cousins).


Thanks very much, makes sense!!


2006 Civic EX 202K/AT
2006 Acura TSX 180K/AT
Re: Oil Brew/Blend Calculator? [Re: maverickfhs] #4630605
01/10/18 03:40 PM
01/10/18 03:40 PM
Joined: Jun 2016
Posts: 3,008
MN
oil_film_movies Offline
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MN
It gets tricky if you mix a 5w30 with a 0w30. I don't know if the result will be a 5w or a 0w when its cold. I assume linear proportional there.

Re: Oil Brew/Blend Calculator? [Re: maverickfhs] #4630607
01/10/18 03:42 PM
01/10/18 03:42 PM
Joined: Dec 2016
Posts: 2,170
VA
maverickfhs Offline OP
maverickfhs  Offline OP
Joined: Dec 2016
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VA
So I have to know cST for each oil. Now, how can I find it for each specific oil type? Is it mentioned on the bottle or have to looks at the datasheet?


2006 Civic EX 202K/AT
2006 Acura TSX 180K/AT
Re: Oil Brew/Blend Calculator? [Re: maverickfhs] #4630609
01/10/18 03:42 PM
01/10/18 03:42 PM
Joined: Dec 2011
Posts: 4,759
North Carolina
rooflessVW Offline
rooflessVW  Offline
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North Carolina
I don't get it... What's wrong with just buying the oil your engine actually NEEDS, and just using that?


"Zed's dead baby, Zed's dead."
Re: Oil Brew/Blend Calculator? [Re: rooflessVW] #4630610
01/10/18 03:46 PM
01/10/18 03:46 PM
Joined: Dec 2016
Posts: 2,170
VA
maverickfhs Offline OP
maverickfhs  Offline OP
Joined: Dec 2016
Posts: 2,170
VA
Originally Posted By: rooflessVW
I don't get it... What's wrong with just buying the oil your engine actually NEEDS, and just using that?


Sorry, just trying to learn it smile

I have enough oil in my stash to comfortably take care of all vehcile manufacturer recommended SAE grades for now.


2006 Civic EX 202K/AT
2006 Acura TSX 180K/AT
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