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#2630524 - 05/18/12 11:03 PM Mixing motor oil
ForesterBill Offline


Registered: 05/18/12
Posts: 2
Loc: Arizona, USA
Is there a problem mixing different brands of motor oil in my car engine so long as the mixed brands are the same viscosity (5W30) and API service grade (SM) ?

Bill
2010 Subaru Forster


Edited by ForesterBill (05/18/12 11:07 PM)

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#2630525 - 05/18/12 11:03 PM Re: Mixing motor oil [Re: ForesterBill]
dave1251 Offline


Registered: 07/15/05
Posts: 7242
Loc: Maricopa, AZ
Mix away.
_________________________
make the inside of your engine oil cap white.
don't use.

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#2630530 - 05/18/12 11:08 PM Re: Mixing motor oil [Re: ForesterBill]
Quattro Pete Offline


Registered: 10/30/02
Posts: 25938
Loc: Michigan
Originally Posted By: ForesterBill
Is there a problem mixing different brands of motor oil in my car engine so long as the mixed brands are the same viscosity (5W30) and API service grade (SM) ?

Bill
2010 Subaru Forster

No problem. You can even mix different viscosity grades if you want.
_________________________
'02 530i (PU 5W-40)
'08 C300 4Matic (M1 0W-40)
'13 F700 GS (BMW HP 15W-50)

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#2630556 - 05/18/12 11:53 PM Re: Mixing motor oil [Re: ForesterBill]
Zeus103363 Offline


Registered: 02/11/12
Posts: 167
Loc: Louisiana
Go for it. In one of my atv's, i have a mix of M1 4T 10w-40 (synthetic), valvoline 4T 10w-40 (dino), and shell rotells T4 10w-30 (HDEO). Runs great!
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Only on BITOG!

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#2630576 - 05/19/12 01:26 AM Re: Mixing motor oil [Re: ForesterBill]
hardcore302 Offline


Registered: 11/23/09
Posts: 2426
Loc: Suffolk County, NY
Do it up! Just have a general idea of what grade you want.
_________________________
2007 Ford Mustang GT - FL-820S filter
2011 Chevy Equinox LT - Driveworks filter

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#2630598 - 05/19/12 02:36 AM Re: Mixing motor oil [Re: ForesterBill]
Dumc87 Offline


Registered: 06/05/10
Posts: 102
Loc: Florida
I'm looking at Mobil1 15w50 for my Nissan 300ZX. Curious if I used 3qts 15w50 and topped it off with M1 extended performance 0w20.
_________________________
1998 Grand Cherokee lifted 6.5" - RIP

1990 Nissan 300ZX N/A Auto - Blue Azure Pearl 151k+
1997 Grand Cherokee 5.2 4x4 212k+

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#2630607 - 05/19/12 03:12 AM Re: Mixing motor oil [Re: Dumc87]
Gene K Offline


Registered: 01/25/03
Posts: 3161
Loc: Decatur AL USA
Originally Posted By: Dumc87
I'm looking at Mobil1 15w50 for my Nissan 300ZX. Curious if I used 3qts 15w50 and topped it off with M1 extended performance 0w20.


No such animal as 0W20 EP.

Would be:
14.95 cSt at 3/1 15W50/5W20EP
14.85 cSt at 3/1 15W50/0W20AFE

Basically is would be similar to a 40 Weight HDE0. Have you considered just buying a gallon of Shell Rotella T6 5W40 ($21) if you want a heavier 40 weight (compared to M1 0W40)?

Personally if you havnt tried it I think M1 0W40 would make an outstanding oil for that engine.
_________________________
Gene






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#2630718 - 05/19/12 08:54 AM Re: Mixing motor oil [Re: Gene K]
ForesterBill Offline


Registered: 05/18/12
Posts: 2
Loc: Arizona, USA
Thanks for the feedback. I'll keep mixing the leftover 0.9 quarts from those 5.1 quart jugs.

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#2630721 - 05/19/12 09:01 AM Re: Mixing motor oil [Re: ForesterBill]
bluesubie Offline


Registered: 08/04/03
Posts: 1861
Loc: NJ
This is ForesterBill mixing:

getdown

Also,
welcome

-Dennis
_________________________
'04 Subaru Forester 2.5XT
Motul X-cess 5W-40 | OEM Honeywell filter

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#2630849 - 05/19/12 12:30 PM Re: Mixing motor oil [Re: Gene K]
Dumc87 Offline


Registered: 06/05/10
Posts: 102
Loc: Florida
Yep, I definitely got that mixed up lol Sorry

I'm actually using T6 5w40 right now; seems to be working great! The oil is already a bit dark, so I'm sure it's been working on cleaning things up over the last 5-600 miles or so. Way too short of an oil interval, but I am curious to get something a tad lighter since I don't have a track driven twin turbo.

M1 0w40 has been recommended actually. Right now I'm trying to figure out some oils that may work from Motul (either 0w30 X-lite or 5w30 X-max seem to be the choice so far)

I am going to install an aftermarket oil pressure gauge soon, hopefully this week, so I may get the 0w40 M1 since it's readily available at Wal Mart.
_________________________
1998 Grand Cherokee lifted 6.5" - RIP

1990 Nissan 300ZX N/A Auto - Blue Azure Pearl 151k+
1997 Grand Cherokee 5.2 4x4 212k+

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