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#4583338 - 11/24/17 01:53 AM Mixing 0W-20 Idemitsu and 10W-40=5W-30..?
TurboTravis Online   content


Registered: 07/26/07
Posts: 207
Loc: NY
Hey guys,

I picked up a bunch of Idemitsu 0W-20 from Advance Auto on clearance. I have always understood that mixing oils of different weights will net the average viscosity of the oils used in the mix. With that said, I recently changed the oil in my truck (2005 Chevy 5.3L) and beater car (2000 Honda Accord 2.3L) with a 50/50 mix of Idemitsu 0W-20 and 10W-40 (various brands used). Will be changed at the standard OCI or in the case of the Honda, probably earlier. Curious what you guys think of this.

Thanks
Travis

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#4583340 - 11/24/17 02:06 AM Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: TurboTravis]
Crispysea Offline


Registered: 04/14/17
Posts: 403
Loc: TN USA
I think it would be fine, especially for an older vehicle with lower specs. I wouldn’t do a long interval, but it’s so cheap you wouldn’t need to. A lot of forum members have tried it, just look up “Frankenblend”.


Edited by Crispysea (11/24/17 02:08 AM)

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#4583354 - 11/24/17 04:44 AM Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: TurboTravis]
Dave9 Offline


Registered: 08/28/17
Posts: 176
Loc: Cincinnati, USA
It's fine and there's no such thing as "especially for an older vehicle with lower specs". No matter what the vehicle or specs, use the oil viscosity recommended for the operating environment whether you mix to reach that viscosity or buy it off the shelf that way.

If a vehicle has a lower service grade spec'd, that doesn't mean "just needs to be that good". It will also benefit from the higher modern spec oil, it's just that they couldn't spec something that wasn't available for testing at the time.


Edited by Dave9 (11/24/17 04:46 AM)

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#4583358 - 11/24/17 04:50 AM Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: TurboTravis]
Shannow Online   content


Registered: 12/12/02
Posts: 39874
Loc: 'Stralia
Dave9...how do you mix to achieve the desired properties ?

Can you provide us with (say) an SAE or API guideline on how to achieve your desired specifications and outcomes through mixing OTC certificated products ?

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#4583373 - 11/24/17 06:14 AM Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: TurboTravis]
pbm Offline


Registered: 04/19/04
Posts: 7605
Loc: New York
I would guess that a 50/50 mix of 0w20 and 10w40 would result in something very close to a 5w30.
I probably wouldn't run such mix in the winter but see no issue running it in the other 3 seasons (because of unknown cold weather characteristics).
_________________________
'Journalism is Dead'

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#4583427 - 11/24/17 08:03 AM Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: TurboTravis]
wemay Offline


Registered: 04/04/12
Posts: 8895
Loc: Southeast Florida
http://www.widman.biz/English/Calculators/Mixtures.html




*I bought the same oil for the same clearance price ($2.95 per jug and $.85 per qt). My 2.4 Sonata will be getting this 0W20 for some time. Incidentally, it is thicker at operating temps than many (recommended by Hyundai) 5W20.
_________________________
2017 Hyundai Sonata Sport 2.4L
2013 Hyundai Santa Fe Sport 2.0T
Valvoline

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#4583429 - 11/24/17 08:09 AM Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: Shannow]
Hounds Offline


Registered: 03/19/09
Posts: 518
Loc: Hither & Yon
Originally Posted By: Shannow
Dave9...how do you mix to achieve the desired properties ? . . .

I'm going to guess he uses a funnel. grin

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#4583542 - 11/24/17 10:16 AM Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: Hounds]
PimTac Online   content


Registered: 03/04/17
Posts: 4307
Loc: Soviet State of Washington
Originally Posted By: Hounds
Originally Posted By: Shannow
Dave9...how do you mix to achieve the desired properties ? . . .

I'm going to guess he uses a funnel. grin



And a Mk1 eyeball.
_________________________
2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter


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#4583595 - 11/24/17 11:38 AM Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: Dave9]
Crispysea Offline


Registered: 04/14/17
Posts: 403
Loc: TN USA
I really didn’t mean the API rating. I meant I wouldn’t do it in an engine that calls for Dexos, BMW LL-04, etc.

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#4583604 - 11/24/17 11:48 AM Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: TurboTravis]
BlueOvalFitter Offline


Registered: 02/28/03
Posts: 6003
Loc: Cajun Country, La.
Originally Posted By: TurboTravis
Hey guys,

I picked up a bunch of Idemitsu 0W-20 from Advance Auto on clearance. I have always understood that mixing oils of different weights will net the average viscosity of the oils used in the mix. With that said, I recently changed the oil in my truck (2005 Chevy 5.3L) and beater car (2000 Honda Accord 2.3L) with a 50/50 mix of Idemitsu 0W-20 and 10W-40 (various brands used). Will be changed at the standard OCI or in the case of the Honda, probably earlier. Curious what you guys think of this.

Thanks
Travis

I used to mix different oil weights all the time back in the day. We call it FRANKENBREW. You're not doing anything wrong. Keep on mixing!
thumbsup USA

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#4583643 - 11/24/17 12:34 PM Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: pbm]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: pbm
I would guess that a 50/50 mix of 0w20 and 10w40 would result in something very close to a 5w30.


I have a lot of full synthetic 0W-20 that I got on clearance,
but I don't like to tow heavy loads with it.

I add a little Syn-Blend Mystik 15W-50 (same as I run in my Evo Harley) for my "FRANKENBREW" in my F150.
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4583708 - 11/24/17 01:49 PM Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: wemay]
JohnnyJohnson Online   content


Registered: 10/22/09
Posts: 2750
Loc: Wet side WA
Originally Posted By: wemay
http://www.widman.biz/English/Calculators/Mixtures.html




*I bought the same oil for the same clearance price ($2.95 per jug and $.85 per qt). My 2.4 Sonata will be getting this 0W20 for some time. Incidentally, it is thicker at operating temps than many (recommended by Hyundai) 5W20.


I have never seen anything of the fake evening News about cars spontaneously combusting from mixed oils. Sixty Nanoseconds would have never missed this chance if they could have pulled the wool over our eyes.
_________________________
2004 Toyota Corolla 121707
Out: QSUD 5W-30 Purolator One 5030
In: Valvoline ML 5w-30 TG4967 117530 2-8-18
2006 Duramax 74047
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73752 4-22-18

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#4583851 - 11/24/17 05:20 PM Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: JohnnyJohnson]
Shannow Online   content


Registered: 12/12/02
Posts: 39874
Loc: 'Stralia
Originally Posted By: JohnnyJohnson
I have never seen anything of the fake evening News about cars spontaneously combusting from mixed oils. Sixty Nanoseconds would have never missed this chance if they could have pulled the wool over our eyes.


Yes..."nothing blew up" is the new performance standard in BITOG. "spontaneously combusting" is a handy little strawman, 'though, isn't it ?

Can't wait for the API to adopt it other than all those other expensive tests that go out the window when you mix. It will undoubtedly make for a less expensive product.

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#4583907 - 11/24/17 06:29 PM Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: TurboTravis]
PimTac Online   content


Registered: 03/04/17
Posts: 4307
Loc: Soviet State of Washington
For me, if I wanted 5w-30, I would purchase it rather than mixing some concoction of assorted oils. That is a waste of excellent Idemitsu oil.
_________________________
2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter


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#4584084 - 11/24/17 10:17 PM Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: PimTac]
TurboTravis Online   content


Registered: 07/26/07
Posts: 207
Loc: NY
Originally Posted By: PimTac
For me, if I wanted 5w-30, I would purchase it rather than mixing some concoction of assorted oils. That is a waste of excellent Idemitsu oil.


It's all yours for the right price!

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