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4 qts of this 4 qts of that #5234358 10/08/19 10:06 PM
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SigShooter Offline OP
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I have 4 qts of Sunoco synthetic 0w20 Dexos 1 Gen 2 and 4 qts of Valvoline synthetic 0w20 Dexos 1 Gen 2. What are your thoughts on mixing all 8 qts for my next oil change? 2016 Silverado 5.3.

Re: 4 qts of this 4 qts of that [Re: SigShooter] #5234361 10/08/19 10:15 PM
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Reddy45 Offline
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Don't do it!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Re: 4 qts of this 4 qts of that [Re: SigShooter] #5234368 10/08/19 10:29 PM
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oldhp Offline
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You and "the truck" won't know a bit of difference at 3K, 5K or 10K miles OCI. Sleep well.


"None of us are getting out here alive.....drink that beer.....eat that pizza......drive that Hot Rod"
"When others cut you down, remember where they came from."
"I don't run...........I just wait"
Re: 4 qts of this 4 qts of that [Re: SigShooter] #5234383 10/08/19 10:50 PM
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Jetsfan421 Offline
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Do it without losing a minute of sleep. It's completely fine to mix within the same viscosity rating. Some even mix different viscosities without any ill effects. I did several frankenbrews in my 05 impala and it seemed to thrive on it.

Re: 4 qts of this 4 qts of that [Re: SigShooter] #5234398 10/08/19 11:40 PM
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69GTX Offline
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Not a fan of mixing totally different add packs.....even if viscosities are identical.


----------------

2001 Lincoln Cont 4.6L DOHC/ 50K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: 4 qts of this 4 qts of that [Re: SigShooter] #5234410 10/09/19 12:31 AM
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Mad_Hatter Offline
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It's your car, do what you want..but no performance guarantees can be made when you mix finished lubes.
For example the anti corrosion inhibitors or detergents in lube A could compete more aggressively for surface area than the AW pkg in lube B..so you've inadvertantly lowered the combined lubes wear protection. That's the law of unintended consequences.

If it were me I'd use the least amount of make up oil needed. This lessens the chance of any (in)compatibility issues from one lube formula to the next. (blenders obtain add pks from the likes of Oronite or Lubrizol that are compatible with a range of base oils in their portfolio so they don't have to test everytime)

Last edited by Mad_Hatter; 10/09/19 12:35 AM.
Re: 4 qts of this 4 qts of that [Re: SigShooter] #5234411 10/09/19 12:33 AM
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Silk Offline
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Or you could say - a gallon of this, a gallon of that.....


1987 BMW R65 - Penrite VTwin 20-50
2005 Nissan Expert - 5W-30 Castrol Edge
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.
Re: 4 qts of this 4 qts of that [Re: SigShooter] #5234442 10/09/19 02:30 AM
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Bailes1992 Offline
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You'll be absolutely fine. Both are quality oils with approvals, even better they are both the same viscosity and same specification.

My Mother has a Suzuki Jimmny with a Suzuki M13A and my Mother-In-Law has a Suzuki Swift with the same M13A. Both cars have had all sorts of questionable mixes over the years.

As an example, my Mothers Jimmny currently has something like 500ml Total Quartz 9000 0w30, 1 Litre Castrol Magnatec 5w30 A5, 500ml Shall Helix Ultra 5w40, 500ml Mobil1 Turbo Diesel 0w40 and 2 Litres Morris Lubricants HD4 15w40.

Both cars are squeaky clean under the covers and the VVT is fully operational, this is even despite my Mothers doing 'extended' intervals.


17 Volvo V40 D3 Auto - 96 Defender 300TDi - 03 Ford Mondeo ST 3.0 V6
Engine - Castrol Edge 5w30 LL
Manual - Fuchs Sintofluid 75w80
ATF - Comma MVATF
Diff & Transfer - Fuchs Sintopoid 75w90
Re: 4 qts of this 4 qts of that [Re: SigShooter] #5234467 10/09/19 05:00 AM
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toneydoc Offline
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It will be just fine to mix them


1994 Jeep 166k NextGen 10w30
2014 Camry 42k Castrol Magnatec 0w20
2018 Jeep Cherokee 6k Pennzoil Platinum 5w30
2014 HD Ultra 51k Mobil1 15w50
Re: 4 qts of this 4 qts of that [Re: SigShooter] #5234480 10/09/19 05:47 AM
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RDY4WAR Offline
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I never recommend blending different oils. The viscosity isn't the issue. The problem is base oil incompatibility and additive clash risks.

Every oil is formulated with a careful balance in the additive package to ensure no one additive overpowers and outcasts another. An example of this is anti-wear additives attempting to lay down a protective tribofilm on the same surface area the neutral detergents are trying to strip and clean. When you blend oils, you can easily upset that balance and cause additive clash with two different additive chemistries competing against one another rather than with one another.

I would pick up 4 quarts of each oil listed and do separate oil changes with them.


"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: 4 qts of this 4 qts of that [Re: SigShooter] #5234502 10/09/19 06:14 AM
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Kira Offline
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3.7854 l of this, 3.7854 l of that.

Re: 4 qts of this 4 qts of that [Re: SigShooter] #5234506 10/09/19 06:18 AM
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JC1 Offline
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How long is your OCI? I would do it.


2015 Grand Caravan SXT Plus 5w-30 Valvoline White Bottle/Fram Ultra Filter
1997 Honda Civic CX 5w-30 Shell Conventional/Fram Ultra Filter
Re: 4 qts of this 4 qts of that [Re: SigShooter] #5234514 10/09/19 06:28 AM
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bbhero Offline
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Originally Posted by SigShooter
I have 4 qts of Sunoco synthetic 0w20 Dexos 1 Gen 2 and 4 qts of Valvoline synthetic 0w20 Dexos 1 Gen 2. What are your thoughts on mixing all 8 qts for my next oil change? 2016 Silverado 5.3.



Well....

Valvoline actually makes the Sunoco motor oil...

So.... Those two oils are not from two totally different blenders. Like say Exxon and Castrol... I'd bet those two oils have a whole lot in common with each other.


Nissan Altima 3.5 Coupe
Cam2 Dexos1 Gen 2 5w30 Wix 57356 Oil filter
"Treat your family like your friends and treat your friends like your family."
Re: 4 qts of this 4 qts of that [Re: 69GTX] #5234520 10/09/19 06:44 AM
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leje0306 Offline
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Originally Posted by 69GTX
Not a fan of mixing totally different add packs.....even if viscosities are identical.


Why?

Re: 4 qts of this 4 qts of that [Re: SigShooter] #5234527 10/09/19 06:55 AM
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Gebo Online Content
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Well, here's my opinion. I wouldn't do it on my newest cars but I would on my oldest cars. How's that for some weird psycho logic?

Based on what bbhero says, I would say you would not have any problem mixing the two. In your situation, I would mix them. Just make
sure you mix them all in a big container before you add them to your engine. LOL


'98 LEX LS400 300K
'02 4Runner 245K
'05 Lex LS430 85K
'07 Lex GX470 65K

Shell Gas and Truck & Supertech Full Syn HM
Toyota ATF's and Coolant
Amsoil Gear Oil and Grease
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