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#4486979 - 08/13/17 12:35 AM PP - Mix 5w30 & 0w40?
webfors Offline


Registered: 06/06/06
Posts: 4942
Loc: Great White North.. eh
I had the pleasure of going across the border and buying some of the European Formula 0w40 PP.

With my new stash of PP 5w30, can anyone come up with any good reason not to mix the two? They are both pure base derived, both SN spec.
_________________________
17 Cadillac ATS 2.0T, Edge D1G2 5w30, XG10575
17 Dodge GC, VWB 5w30, Fram DL11665
15 DL650, Valvoline 20w50, KN-138
Small engines; RT5 10w30

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#4486996 - 08/13/17 01:20 AM Re: PP - Mix 5w30 & 0w40? [Re: webfors]
jongies3 Offline


Registered: 03/11/16
Posts: 800
Loc: MT
I still don't understand the whole concept of mixing different grades. Why not run it exclusively for one OCI and then go back to the 5W-30 stuff? What's it going in?
_________________________
2004 Toyota Tacoma 3.4 V6: Mobil 1 AFE 0W-30, FRAM TG-3600 filter
1996 Ford Contour 2.5 V6 QSGB 5W-30, MC FL-500S filter

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#4487060 - 08/13/17 06:14 AM Re: PP - Mix 5w30 & 0w40? [Re: webfors]
KL31 Offline


Registered: 06/03/16
Posts: 549
Loc: South OZ
What's the positives of mixing those? I understand mixing a thick and a thin eg. 40 with 20 but there's probably not a lot between the two you have. My vote goes to no LOL
_________________________
95 MX-3 2.5L|Shell Helix Ultra 5W40|Wix 51356
04 Focus 1.8L|Wesfil Cooper WZ63|Valvoline MST 5W30
05 Kluger 3.3L|Wesfil Cooper WZ418|Magnatec 10W30 Semi Syn

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#4487090 - 08/13/17 07:12 AM Re: PP - Mix 5w30 & 0w40? [Re: webfors]
pbm Offline


Registered: 04/19/04
Posts: 7605
Loc: New York
I have a couple of quarts of 0w40 PU from the AZ 'Clearance' that I will probably mix with 5w20 to get rid of it.... but I certainly don't think that 'mixing' will create something better than either oil individually.
_________________________
'Journalism is Dead'

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#4487105 - 08/13/17 07:34 AM Re: PP - Mix 5w30 & 0w40? [Re: webfors]
webfors Offline


Registered: 06/06/06
Posts: 4942
Loc: Great White North.. eh
Think about viscosity. I don't want a 40 weight with a super high HTHS. But I wouldn't mind increasing the 3.0 HTHS and 10.3 hot viscosity a little while severe service towing.
_________________________
17 Cadillac ATS 2.0T, Edge D1G2 5w30, XG10575
17 Dodge GC, VWB 5w30, Fram DL11665
15 DL650, Valvoline 20w50, KN-138
Small engines; RT5 10w30

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#4487106 - 08/13/17 07:34 AM Re: PP - Mix 5w30 & 0w40? [Re: webfors]
fdcg27 Offline


Registered: 09/25/09
Posts: 15699
Loc: OH
You'll end up with a 5W-30 most likely.
No harm done.
_________________________
17 Forester 12K MSS 0W-20
12 Accord LX 86K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i

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#4487177 - 08/13/17 10:01 AM Re: PP - Mix 5w30 & 0w40? [Re: webfors]
FermeLaPorte Offline


Registered: 07/25/17
Posts: 472
Loc: Texas (south)
It's pennzoil, I think they never perform well, but it may help to have the 0w40 oil in there
_________________________
Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.

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#4487182 - 08/13/17 10:04 AM Re: PP - Mix 5w30 & 0w40? [Re: FermeLaPorte]
Dyusik Offline


Registered: 09/26/14
Posts: 1982
Loc: US-WA
Originally Posted By: FermeLaPorte
It's pennzoil, I think they never perform well

Based on?
_________________________
95 Cherokee 190K DELO 10W30,XG8
07 IS250 97K FB ?w??,FULL
04 YZF-R1 19K DELO 15w40,XG7317
99 HD XL1200S 18K 76 20w50,1515
14 RX450h 30k PP 0w20,NAPAG

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#4487202 - 08/13/17 10:35 AM Re: PP - Mix 5w30 & 0w40? [Re: webfors]
Mainia Offline


Registered: 04/06/15
Posts: 205
Loc: Upper midwest
Mix it

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#4505697 - 09/02/17 06:31 PM Re: PP - Mix 5w30 & 0w40? [Re: webfors]
webfors Offline


Registered: 06/06/06
Posts: 4942
Loc: Great White North.. eh
While towing up the hill towards Cape Smokey (Cape Breton, Nova Scotia) on our recent family adventure, my coolant temp spiked to 115 degrees Celsius (239 Fahrenheit). If I had followed Dodge recommendations with a 5w20 I would have had a viscosity of approximately 6 cSt during that climb, assuming coolant temp = oil temp.

With PP 5w30 it was around 7.72 cSt, using online temperature viscosity calculators.

For comparison, PP Euro 0w40 would have had a viscosity of 9.71 cSt under similar conditions.

Food for thought for those that blindly follow manufacturer recommendations.
_________________________
17 Cadillac ATS 2.0T, Edge D1G2 5w30, XG10575
17 Dodge GC, VWB 5w30, Fram DL11665
15 DL650, Valvoline 20w50, KN-138
Small engines; RT5 10w30

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#4505708 - 09/02/17 06:40 PM Re: PP - Mix 5w30 & 0w40? [Re: webfors]
KL31 Offline


Registered: 06/03/16
Posts: 549
Loc: South OZ
They're usually about 10C difference under normal conditions. No way to know unless you have an oil temp gauge. Depends on RPMS too. Sustained high rpms heat oil up faster than load does. Your thermostat working ok? 115C seems very high. Was it a super hot summer day with no air flow or something?
_________________________
95 MX-3 2.5L|Shell Helix Ultra 5W40|Wix 51356
04 Focus 1.8L|Wesfil Cooper WZ63|Valvoline MST 5W30
05 Kluger 3.3L|Wesfil Cooper WZ418|Magnatec 10W30 Semi Syn

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#4505713 - 09/02/17 06:46 PM Re: PP - Mix 5w30 & 0w40? [Re: webfors]
webfors Offline


Registered: 06/06/06
Posts: 4942
Loc: Great White North.. eh
About 25 degrees Celsius ambient, ~3000 - 3500 rpms, slow speed (not much airflow). Steep climb, pulling a 2000 pound load, with family of four (+ dog), and related gear for a 3 week road trip. I was surprised to see the temp gauge climb past half way and reach 3/4. Had the scan gauge plugged in for the trip. Interesting stuff learned about coolant temp, ignition timing, load and intake air temps.
_________________________
17 Cadillac ATS 2.0T, Edge D1G2 5w30, XG10575
17 Dodge GC, VWB 5w30, Fram DL11665
15 DL650, Valvoline 20w50, KN-138
Small engines; RT5 10w30

Top
#4505725 - 09/02/17 07:04 PM Re: PP - Mix 5w30 & 0w40? [Re: webfors]
KL31 Offline


Registered: 06/03/16
Posts: 549
Loc: South OZ
Check your thermo fans come on at the right time too. They usually come on around 100C on most cars and sometimes go to full blast mode at 110C.

Some manufacturers state to use higher viscosity when towing. Is there anything about that in your manual?
_________________________
95 MX-3 2.5L|Shell Helix Ultra 5W40|Wix 51356
04 Focus 1.8L|Wesfil Cooper WZ63|Valvoline MST 5W30
05 Kluger 3.3L|Wesfil Cooper WZ418|Magnatec 10W30 Semi Syn

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#4505747 - 09/02/17 07:31 PM Re: PP - Mix 5w30 & 0w40? [Re: webfors]
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1658
Loc: Crawfordville FL
Oil cooler?
_________________________
2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30

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#4505780 - 09/02/17 08:10 PM Re: PP - Mix 5w30 & 0w40? [Re: KL31]
webfors Offline


Registered: 06/06/06
Posts: 4942
Loc: Great White North.. eh
Originally Posted By: KL31
Check your thermo fans come on at the right time too. They usually come on around 100C on most cars and sometimes go to full blast mode at 110C.

Some manufacturers state to use higher viscosity when towing. Is there anything about that in your manual?


There is no language in the manual as such. Just the recommended 5w20.
_________________________
17 Cadillac ATS 2.0T, Edge D1G2 5w30, XG10575
17 Dodge GC, VWB 5w30, Fram DL11665
15 DL650, Valvoline 20w50, KN-138
Small engines; RT5 10w30

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