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Mixing 0W-20 Idemitsu and 10W-40=5W-30..? #4583338
11/24/17 02:53 AM
11/24/17 02:53 AM
Joined: Jul 2007
Posts: 220
NY
TurboTravis Offline OP
TurboTravis  Offline OP
Joined: Jul 2007
Posts: 220
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

Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: TurboTravis] #4583340
11/24/17 03:06 AM
11/24/17 03:06 AM
Joined: Apr 2017
Posts: 435
TN USA
Crispysea Offline
Crispysea  Offline
Joined: Apr 2017
Posts: 435
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”.

Last edited by Crispysea; 11/24/17 03:08 AM.
Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: TurboTravis] #4583354
11/24/17 05:44 AM
11/24/17 05:44 AM
Joined: Aug 2017
Posts: 211
Cincinnati, USA
Dave9 Offline
Dave9  Offline
Joined: Aug 2017
Posts: 211
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.

Last edited by Dave9; 11/24/17 05:46 AM.
Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: TurboTravis] #4583358
11/24/17 05:50 AM
11/24/17 05:50 AM
Joined: Dec 2002
Posts: 40,947
'Stralia
Shannow Offline
Shannow  Offline
Joined: Dec 2002
Posts: 40,947
'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 ?

Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: TurboTravis] #4583373
11/24/17 07:14 AM
11/24/17 07:14 AM
Joined: Apr 2004
Posts: 7,748
New York
pbm Offline
pbm  Offline
Joined: Apr 2004
Posts: 7,748
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'
Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: TurboTravis] #4583427
11/24/17 09:03 AM
11/24/17 09:03 AM
Joined: Apr 2012
Posts: 9,409
Kendall, FL
wemay Offline
wemay  Offline
Joined: Apr 2012
Posts: 9,409
Kendall, FL
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.


'18 KIA Sportage LX AWD 2.4L: MSS 10w30
'13 Hyundai Santa Fe Sport 2.0T: EDGE 5w30
Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: Shannow] #4583429
11/24/17 09:09 AM
11/24/17 09:09 AM
Joined: Mar 2009
Posts: 527
Hither & Yon
Hounds Offline
Hounds  Offline
Joined: Mar 2009
Posts: 527
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

Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: Hounds] #4583542
11/24/17 11:16 AM
11/24/17 11:16 AM
Joined: Mar 2017
Posts: 5,484
...
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 5,484
...
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.



Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: Dave9] #4583595
11/24/17 12:38 PM
11/24/17 12:38 PM
Joined: Apr 2017
Posts: 435
TN USA
Crispysea Offline
Crispysea  Offline
Joined: Apr 2017
Posts: 435
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.

Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: TurboTravis] #4583604
11/24/17 12:48 PM
11/24/17 12:48 PM
Joined: Feb 2003
Posts: 6,003
Cajun Country, La.
BlueOvalFitter Offline
BlueOvalFitter  Offline
Joined: Feb 2003
Posts: 6,003
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

Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: pbm] #4583643
11/24/17 01:34 PM
11/24/17 01:34 PM
Joined: Dec 2016
Posts: 6,270
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,270
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."
Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: wemay] #4583708
11/24/17 02:49 PM
11/24/17 02:49 PM
Joined: Oct 2009
Posts: 3,239
Wet side WA
JohnnyJohnson Online content
JohnnyJohnson  Online Content
Joined: Oct 2009
Posts: 3,239
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 Corolla 124900
Out: VML 5w-30 TG4967 OCI 5007 Miles
In: EDGE EP 5W-30 Bosch 3311 122537 7-18-18
2006 Duramax 74277
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 74705 4-22-18
Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: JohnnyJohnson] #4583851
11/24/17 06:20 PM
11/24/17 06:20 PM
Joined: Dec 2002
Posts: 40,947
'Stralia
Shannow Offline
Shannow  Offline
Joined: Dec 2002
Posts: 40,947
'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.

Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: TurboTravis] #4583907
11/24/17 07:29 PM
11/24/17 07:29 PM
Joined: Mar 2017
Posts: 5,484
...
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 5,484
...
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.



Re: Mixing 0W-20 Idemitsu and 10W-40=5W-30..? [Re: PimTac] #4584084
11/24/17 11:17 PM
11/24/17 11:17 PM
Joined: Jul 2007
Posts: 220
NY
TurboTravis Offline OP
TurboTravis  Offline OP
Joined: Jul 2007
Posts: 220
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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