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#3125453 - 09/15/13 09:46 AM Best Synthetic for '97 Subaru w/ 250K miles
Rev_Tim Offline


Registered: 06/28/10
Posts: 23
Loc: Michigan
I just bought a '97 Subaru Outback 2.5L with 248,000 miles (well serviced througout) and want to switch to synthetic oil. I have used Mobil 1 in my '96 Mercedes 220C since new and it runs the 0W-40. I notice Mobil 1 High Mileage oil is 5WX20 and was surprised. I expected it to be something more like 10WX40. Is the 5Wx20 too thin for the Subaru? If it's not the best choice, what should I use? Most driving will be highway miles.
Thanks

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#3125456 - 09/15/13 09:50 AM Re: Best Synthetic for '97 Subaru w/ 250K miles [Re: Rev_Tim]
simple_gifts Offline


Registered: 07/26/04
Posts: 11410
Loc: Middlesex County CT
There are 10w-30 and 10w-40 M1 high mileage versions. At one time were was a 5W-30 M1 HM too. Unless there is a compelling reason to use a HM oil, i would stick to 5W-30

I have yet to use a HM in my toyota.


Edited by simple_gifts (09/15/13 09:52 AM)
_________________________
2004 Prius; 75K MC 10w-30
2003 Echo > 4.03x10^5 miles; 5w-50
2006 B2300;117K;ALM


Was driving an ox cart; Now on the USS Enterprise

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#3125469 - 09/15/13 10:01 AM Re: Best Synthetic for '97 Subaru w/ 250K miles [Re: Rev_Tim]
bluesubie Offline


Registered: 08/04/03
Posts: 2148
Loc: NJ
If you're keeping your intervals at 5-7k miles I would go with Pennzoil conventional High Mileage. I'm happy with it in my daughter's 2000 2.5RS at 5-6k intervals. If you push your intervals beyond 7,500 miles, then go with Mobil1 High Mileage 5W-30 but do not use a 5W-20.

-Dennis
_________________________
'04 Subaru Forester 2.5XT
Mobil 1 0W-40

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#3125470 - 09/15/13 10:01 AM Re: Best Synthetic for '97 Subaru w/ 250K miles [Re: simple_gifts]
Rev_Tim Offline


Registered: 06/28/10
Posts: 23
Loc: Michigan
What does the HM oil offer that the regular Mobil 1 oils don't? I am gussing now since it's not the viscosity, that it must be some additional additives.
Thanks for the input.

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#3125477 - 09/15/13 10:11 AM Re: Best Synthetic for '97 Subaru w/ 250K miles [Re: Rev_Tim]
SuzukiGoat Offline


Registered: 02/04/13
Posts: 451
Loc: Louisiana
Turbo or NA?

I prefer shorter intervals on the NA versions because of the inadequate cylinder wall support.

Not a problem if you stay on top of it.

I would use PYB for NA with 4-5k drains..more if highway miles.

In turboed...why not 0w40 M1?
_________________________
2003 Nissan Xterra 4x4
2001 Toyota 4runner 4x4
2016 Yamaha YXZ1000R

M1 Ow40 in everything

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#3125495 - 09/15/13 10:23 AM Re: Best Synthetic for '97 Subaru w/ 250K miles [Re: Rev_Tim]
Rand Offline


Registered: 08/20/03
Posts: 11562
Loc: NE,Ohio
Was there even a 1997 outback?


I didnt think they had an actual "outback" model until 2000
(in the usa)
they had outback option on other trims.

you probably have a subaru legacy outback?
(based off legacy)

or a subaru outback sport(based off impreza)

also the 2.5L is a DOHC NA engine.
the turbo engines were 2.0L(IIRC)


I would use conventional/semi syn 5w30 in the winter and 10w40 in the summer.

I would also get an oil analysis and see if your head gaskets are leaking as the year you have is very prone to leak if they werent done already at least once.


Edited by Rand (09/15/13 10:25 AM)
_________________________
2017 Jeep Cherokee Trailhawk V6

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#3125511 - 09/15/13 10:37 AM Re: Best Synthetic for '97 Subaru w/ 250K miles [Re: Rev_Tim]
Rev_Tim Offline


Registered: 06/28/10
Posts: 23
Loc: Michigan
Yes.. it's the Legacy Outback station wagon.. sorry for the misnomer. I'm relatively certain the head gaskets are good... although I haven't gone through all the service records. There are a lot of them to sort through. I don't see any of the typical signs of that either in the engine oil or the cooling system.
I appreciate the input regarding the oil and the rest as well.

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#3125512 - 09/15/13 10:38 AM Re: Best Synthetic for '97 Subaru w/ 250K miles [Re: Rev_Tim]
Rev_Tim Offline


Registered: 06/28/10
Posts: 23
Loc: Michigan
What is PYB? It's not a turbo. Just the regular 2.5L 4 cylinder engine.

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#3125522 - 09/15/13 10:42 AM Re: Best Synthetic for '97 Subaru w/ 250K miles [Re: Rev_Tim]
yesthatsteve Offline


Registered: 06/27/11
Posts: 696
Loc: Kansas City, MO
Pennzoil
Yellow
Bottle

A really robust conventional, perhaps the best available for normal duty. If you want a synthetic, I'd recommend M1 High Mileage in the weight specified on your oil cap or in your owner's manual.
_________________________
'13 LaCrosse eAssist, 30000+ miles | Synpower 5w30 & Fram EG
'11 Accord I4 Sedan, 80000+ miles | Mobil1 0w20 & Fram TG

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#3125529 - 09/15/13 10:46 AM Re: Best Synthetic for '97 Subaru w/ 250K miles [Re: yesthatsteve]
Rev_Tim Offline


Registered: 06/28/10
Posts: 23
Loc: Michigan
Thanks.. I knew what PBR is.. and now I know what PYB is. I'll stick with M1. Somehow I feel if I spend all that extra money.. I'm a better person (car guy) and the car will be happier and return the favor with better performance and fewer problems. I also buy higher end filters for the same reason.

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#3125532 - 09/15/13 10:48 AM Re: Best Synthetic for '97 Subaru w/ 250K miles [Re: Rev_Tim]
Kuato Offline


Registered: 10/23/05
Posts: 6404
Loc: Colorado
Originally Posted By: Rev_Tim
Thanks.. I knew what PBR is....



cheers

Some don't!
_________________________
Oil condition is speculation until a UOA is performed.

2013 F150 5.0 4x4 SuperCab 63k on Amsoil

Thick vs Thin test: 6k / 43k miles complete


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#3125535 - 09/15/13 10:53 AM Re: Best Synthetic for '97 Subaru w/ 250K miles [Re: Kuato]
Rev_Tim Offline


Registered: 06/28/10
Posts: 23
Loc: Michigan
Yeah.. but you obviously do (Pabst Blue Ribbon... the best of the basic beers)

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#3125552 - 09/15/13 11:19 AM Re: Best Synthetic for '97 Subaru w/ 250K miles [Re: Rev_Tim]
Mark_Walk Offline


Registered: 09/19/11
Posts: 461
Loc: Danville, KY
My son really likes GC 0w30 in his 98 Subbie with 160,000 miles.
_________________________
2011 BMW328xi (M1 0w40) 118,000mi
2010 Mazda6iTP (SYNPWR 5w20) 151,000mi
2007 VolvoXC70 (M1 0w40) 141,000mi
2002 TrailBlazerEXT (PYB 5w30) 155,000mi

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#3125577 - 09/15/13 11:50 AM Re: Best Synthetic for '97 Subaru w/ 250K miles [Re: Rev_Tim]
95busa Offline


Registered: 10/15/05
Posts: 1249
Loc: Tennessee
Does. Not. Matter.
_________________________
2005 Ford F250 Super Duty 4x4
2009 Dodge Grand Caravan
2014 Kia Forte KOUP- totaled by a drunk driver

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#3125589 - 09/15/13 12:04 PM Re: Best Synthetic for '97 Subaru w/ 250K miles [Re: Rev_Tim]
Clevy Offline


Registered: 11/11/10
Posts: 9783
Loc: Saskatoon canada
Originally Posted By: Rev_Tim
Thanks.. I knew what PBR is.. and now I know what PYB is. I'll stick with M1. Somehow I feel if I spend all that extra money.. I'm a better person (car guy) and the car will be happier and return the favor with better performance and fewer problems. I also buy higher end filters for the same reason.


Hehehe. Why let let the obvious get in the way of your feelings.
Doesn't matter what oil you use. If its never had synthetic why spend more now when its never seen it before
_________________________
2006 Charger RT
Miles x 2 per oil filter

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