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#1688195 - 11/29/09 12:29 AM Any andvantage of mixing 5w20 w/ 5w30............
arh Offline


Registered: 04/07/08
Posts: 34
Loc: MN
.....in a vehicle specd for 5w30. Vehicle is a 02 Chevy Silverado w/ a 5.3l. Thinking of trying 3qt of Motorcraft 5w20 w/ 3qt of Motorcraft 5w30. It will be getting very cold (-20 to -40sf) here soon in the north part of the country, and thinking of trying this. Using Mobil 1 right now, but can get two oc's (5k) w/ the MC for the price of one w/ the Mobil. Any thoughts or suggestions appreciated. Thanks! Cheers2

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#1688219 - 11/29/09 01:12 AM Re: Any andvantage of mixing 5w20 w/ 5w30............ [Re: arh]
DeeAgeaux Offline


Registered: 05/29/09
Posts: 325
Loc: Los Angeles
If you want to improve cold weather starts why not 0w-30?

Improve cold weather start ability but stay at the specified 30 weight at temperature.
_________________________
03 Honda Accord I-4 5AT
96k Miles
PP 5w-20 10k OCI

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#1688222 - 11/29/09 01:15 AM Re: Any andvantage of mixing 5w20 w/ 5w30......... [Re: arh]
Johnny Offline


Registered: 05/27/02
Posts: 14013
Loc: Retired | Wausau, WI
No. They are both 5W when cold. The suggestion above would be the better choice, use 0W-30, and since you like Mobil 1, use their 0W-30.

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#1688304 - 11/29/09 06:25 AM Re: Any andvantage of mixing 5w20 w/ 5w30......... [Re: Johnny]
jstutz Offline


Registered: 10/06/08
Posts: 1553
Loc: NC
Although i dont think it would hurt to mix them, i agree with the post above. Blenders spend a lot of money blending a product for partulicar applications. With the choices we have today there really is no need for home blending. That said, i have been running PP 5w20 in my 4.3 blazer since this october and have noticed no ill effects. Granted that isnt exactally long term useage but for winter, i dont see any issues.

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#1688305 - 11/29/09 06:29 AM Re: Any andvantage of mixing 5w20 w/ 5w30......... [Re: jstutz]
jstutz Offline


Registered: 10/06/08
Posts: 1553
Loc: NC
I should add, it depends on how you use your truck. My blazer sees nothing but short trips anymore so really the oil hardly gets to temp in it. If i were driving lots of miles and the engine was hot for long periods of time, i would probably just stick with a synthetic 5w30. Im not saying 5w20 would hurt you, i just dont know enough about these engines to know if it would hurt anything. My guess would be that there is no reason you couldnt run it.

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#1688337 - 11/29/09 07:39 AM Re: Any andvantage of mixing 5w20 w/ 5w30......... [Re: jstutz]
Eddie Offline


Registered: 12/07/03
Posts: 9049
Loc: Florida, Cape Coral
NO ADVANTAGE
_________________________
CX5 Touring 2.5L :-)

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#1688338 - 11/29/09 07:40 AM Re: Any andvantage of mixing 5w20 w/ 5w30......... [Re: jstutz]
Bluestream Offline


Registered: 09/13/03
Posts: 5676
Loc: Waterloo, ON
If you are planning to use the 5W20 in winter only, it will work well. In fact the 5W20 at winter operating temp, will still be thicker than a 5W30 at summer operating temp.
_________________________
2000 VW Beetle 1.8T M5
2000 Ford Explorer 4.0 4X4
1991 BMW 735iL
"A fool and his money are soon parted" - Thomas Tusser

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#1688348 - 11/29/09 08:02 AM Re: Any andvantage of mixing 5w20 w/ 5w30......... [Re: arh]
fdcg27 Offline


Registered: 09/25/09
Posts: 14483
Loc: OH
The only reason I would mix the two is the reason that I did.
If I had some orphan quarts of 5W-20, and I wanted to use them in a 5W-30 application over the winter, I would buy some 5W-30 of the same brand and type, and mix away.
This is exactly what I did, which is why I have a mix of M1 EP 20 and 30 in the '97 Accord at the moment.
I would not purhase oil with the express intent of mixing it, unless I already had some orphan quarts to use up.
I am guessing that the least sharp guys in the lube blending industry know a great deal more about formulating a finished product that meets specs than I ever will.
_________________________
17 Forester FF
12 Accord LX 69K SS 0W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 BMW 318i 163K D1300

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#1688411 - 11/29/09 09:25 AM Re: Any andvantage of mixing 5w20 w/ 5w30......... [Re: fdcg27]
Bluestream Offline


Registered: 09/13/03
Posts: 5676
Loc: Waterloo, ON
The mixing of the 5W20 and 5w30 would give you a small MPG gain to due the thinner oil at operating temp. I would just use straight 5W20 (winter only)

I just put 5W20 in my explorer even though Ford does not recommend it for my engine and model year. It will be replaced in the Spring with 5W30 or 10W30...
_________________________
2000 VW Beetle 1.8T M5
2000 Ford Explorer 4.0 4X4
1991 BMW 735iL
"A fool and his money are soon parted" - Thomas Tusser

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#1688604 - 11/29/09 01:58 PM Re: Any andvantage of mixing 5w20 w/ 5w30......... [Re: Bluestream]
Black_Thunder Offline


Registered: 09/23/06
Posts: 1149
Loc: Wisconsin
actually for your explorer the 4.0 OHC engine is back-spec'd for 5w20. just not he OHV 4.0

also backspec'ed is my Explorer with the 5.0 v8.

but i stick with 5w30.




Edited by Black_Thunder (11/29/09 01:59 PM)
_________________________
I'd buy Callahan autoparts if I could.

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#1688609 - 11/29/09 02:04 PM Re: Any andvantage of mixing 5w20 w/ 5w30......... [Re: Black_Thunder]
dblshock Offline


Registered: 04/24/07
Posts: 2345
Loc: WI.
mixing those would result in a 5w25..I too have gone with low priced (.67 qt.) 5w20 in my Hondas run it 7,500 or longer filter every 15-20k..saves time and money.
_________________________
16 Civic Coupe Touring
640:1 TCW-3 E091
Edge 0/40/XG7317
Firehawk Indy 500

06 4Runner SR5 127k
640:1 TCW-3
M1 0/40 XG3614
Bridgestone Dueler + H/L

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#1688638 - 11/29/09 02:49 PM Re: Any andvantage of mixing 5w20 w/ 5w30......... [Re: Black_Thunder]
Bluestream Offline


Registered: 09/13/03
Posts: 5676
Loc: Waterloo, ON
Originally Posted By: Black_Thunder
actually for your explorer the 4.0 OHC engine is back-spec'd for 5w20. just not he OHV 4.0

also backspec'ed is my Explorer with the 5.0 v8.

but i stick with 5w30.




Black Thunder, when was it back specd? Acording to TSB article no. 01-4-7 The 4.0L SOHC engine is one of a few that had an exemption to the 5W20 back spec. Ford listed 5W30 unless this has changed again. I can't see it making much difference either way, but maybe they have a reason for it.
_________________________
2000 VW Beetle 1.8T M5
2000 Ford Explorer 4.0 4X4
1991 BMW 735iL
"A fool and his money are soon parted" - Thomas Tusser

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#1688690 - 11/29/09 04:25 PM Re: Any andvantage of mixing 5w20 w/ 5w30............ [Re: arh]
Mitch Alsup Offline


Registered: 04/25/05
Posts: 724
Loc: Austin Texas
5W-20 cold 45.9 cSt, -30dC 4000 cP
5W-30 cold 60.0 cSt, -30dC 4250 cP

Not a "whole lot" of difference, but the 5W-20 IS thinner -- which will help with starts in cold weather.

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