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#4441184 - 06/25/17 02:41 PM Mixing Pennzoil Platinum and Castrol Magnatec.
GRWOil Offline


Registered: 11/23/16
Posts: 190
Loc: Missouri
I went to change the oil yesterday in my sister's 2016 Hyundai Accent. It's a 1.6L naturally asperated GDI engine, with a 3.7 quart sump. When I changed it last winter, I filled it from a 5 qt. jug of PP 5w-20 and put a fram Ultra on it. 7500 miles later, I had about 1.5 quarts of PP left from the first oil change and some bottles of Magnatec 5w-20 in the garage.

Long story short, it's got about half PP and half Magnatec, both 5w-20. I didn't think much of it at the time, but now I'm having second thoughts. Are these two oils incompatible? Could there be issues with long-term performance (7,500 miles/6 months) with a mix from two different brands?

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#4441186 - 06/25/17 02:47 PM Re: Mixing Pennzoil Platinum and Castrol Magnatec. [Re: GRWOil]
CT8 Offline


Registered: 10/09/14
Posts: 10920
Loc: Idaho
The oils will be fine.
_________________________
"Don't let your preconceived notions get in the way of facts."Geoff Metcalf"

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#4441214 - 06/25/17 03:12 PM Re: Mixing Pennzoil Platinum and Castrol Magnatec. [Re: GRWOil]
PeterPolyol Offline


Registered: 03/06/16
Posts: 1345
Loc: toronto
popcorn2

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#4441245 - 06/25/17 03:58 PM Re: Mixing Pennzoil Platinum and Castrol Magnatec. [Re: GRWOil]
blupupher Offline


Registered: 08/27/04
Posts: 4414
Loc: Katy, Republic of Texas
Many say mix away, many give dire warnings that there could be problems.

No you will not have an exact known quality of oil, but you are mixing 2 good oils. No different that the millions upon millions of vehicles that have whatever oil added as top off oil during an oil change.

I am of the mix away camp, and have mixed different brand (and weights) of oils with no issues (which proves nothing). If the need arises, I will continue to do so. I know that I have a few qts of misc oil that will eventually be mixed for an oil change in my truck.
These include 2 qts PU 5w-20, 1 qt M1 EP 0w-20, 2 qt Auto Zone Syn 0w-20, 1 qt Havoline HM 5w-20.
_________________________
1994 Honda VT1100C: Peak 15w-40/TG/2500 mile OCI
2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
2012 Scion xB: QSUD 0w-20/CQ Blue/5k OCI


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#4441255 - 06/25/17 04:12 PM Re: Mixing Pennzoil Platinum and Castrol Magnatec. [Re: GRWOil]
jongies3 Offline


Registered: 03/11/16
Posts: 795
Loc: MT
Ever since SL, oil companies have been required by the government to make it so all their additives are compatible with all other oil additives. Used to be a bad idea to do this back in the day, but things are different now so don't worry about it.
_________________________
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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#4441261 - 06/25/17 04:19 PM Re: Mixing Pennzoil Platinum and Castrol Magnatec. [Re: GRWOil]
TexasVaquero Offline


Registered: 05/31/17
Posts: 127
Loc: South Texas Rancho
I don't think anything bad is gonna happen. One thing I have been told by Mobil 1 is that if you mix different oils, you reduce both oils' benefits, but that does not make them any worse.
_________________________
2014 NISSAN VERSA 5spd M/T- M1 EP 5w30 and M1 EP Filter. 5k OCI.
2011 CHEVY IMPALA 3.5ltrs - M1 HM 5w30 and M1 EP Filter. 3k OCI.

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#4441304 - 06/25/17 05:23 PM Re: Mixing Pennzoil Platinum and Castrol Magnatec. [Re: jongies3]
Shannow Online   content


Registered: 12/12/02
Posts: 39835
Loc: 'Stralia
Originally Posted By: jongies3
Ever since SL, oil companies have been required by the government to make it so all their additives are compatible with all other oil additives. Used to be a bad idea to do this back in the day, but things are different now so don't worry about it.


Really ? show me where that's a fact ...

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#4441308 - 06/25/17 05:26 PM Re: Mixing Pennzoil Platinum and Castrol Magnatec. [Re: GRWOil]
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1654
Loc: Crawfordville FL
When possible do not mix. The oil isn't going to turn into tar or anything but you're guessing at additive packages and don't really know what you end up with. It's likely that the mix would be less effective than either oil by itself depending on the additives in the two oils.

The folks who mix are trying to build a better mousetrap. It's not needed.
_________________________
2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30

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#4441314 - 06/25/17 05:33 PM Re: Mixing Pennzoil Platinum and Castrol Magnatec. [Re: GRWOil]
69GTX Offline


Registered: 09/23/15
Posts: 3815
Loc: Connecticut
If you're going to mix oil brands/grades, those 2 are fairly close in additive packages. High calcium, no magnesium, no sodium oils.
_________________________
----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs

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#4441373 - 06/25/17 06:31 PM Re: Mixing Pennzoil Platinum and Castrol Magnatec. [Re: GRWOil]
SR5 Offline


Registered: 07/07/15
Posts: 4456
Loc: Down Under
I would not worry about it, for 6 months in a Hyundai with two name brand synthetics. I worry more about people who don't check the oil level and let it get too low.
_________________________
Penrite Vantage 10W40 SN & A3/B4 + Wesfil-Cooper Z154

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#4441387 - 06/25/17 06:49 PM Re: Mixing Pennzoil Platinum and Castrol Magnatec. [Re: GRWOil]
Errtt Offline


Registered: 11/14/10
Posts: 2804
Loc: California
Once knew someone who mixed like 4 different HM oils. I think it was a quart each for about a 4 quart sump. He had some weird name of his mix. Your Pentrol Plattec should be fine.

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#4441403 - 06/25/17 07:01 PM Re: Mixing Pennzoil Platinum and Castrol Magnatec. [Re: GRWOil]
SR5 Offline


Registered: 07/07/15
Posts: 4456
Loc: Down Under
Magna-Platinum
_________________________
Penrite Vantage 10W40 SN & A3/B4 + Wesfil-Cooper Z154

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#4441419 - 06/25/17 07:23 PM Re: Mixing Pennzoil Platinum and Castrol Magnatec. [Re: GRWOil]
WillsYoda Offline


Registered: 10/17/15
Posts: 471
Loc: MN
Mix away camp here. Similar add packs. Will work fine. I do it, since I hate waste.

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#4441533 - 06/25/17 09:46 PM Re: Mixing Pennzoil Platinum and Castrol Magnatec. [Re: Errtt]
ThirdeYe Offline


Registered: 02/23/07
Posts: 8155
Loc: Grand Rapids, MI
Originally Posted By: Errtt
Once knew someone who mixed like 4 different HM oils. I think it was a quart each for about a 4 quart sump. He had some weird name of his mix. Your Pentrol Plattec should be fine.


I had 3 different oils in my crankcase on my last oil change. I started with Pennzoil Platinum High Mileage, but topped off with Havoline High Mileage and 2 quarts of Formula Shell along the way (all in 5W-20). Still ran just fine. In fact, for some reason it seemed to consume less after it became more of a hodgepodge of oils. grin
_________________________
07 Honda Accord - 598k - Valvoline 5W-20/Purolator Synthetic PSL14610

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#4441540 - 06/25/17 09:59 PM Re: Mixing Pennzoil Platinum and Castrol Magnatec. [Re: jongies3]
Dyusik Offline


Registered: 09/26/14
Posts: 1978
Loc: US-WA
Originally Posted By: jongies3
Ever since SL, oil companies have been required by the government to make it so all their additives are compatible with all other oil additives. Used to be a bad idea to do this back in the day, but things are different now so don't worry about it.

That is your answer, including atf etc.
_________________________
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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