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#4470303 - 07/25/17 06:40 PM What oil should I use for my Subaru Impreza?
Felman Offline

Registered: 03/22/17
Posts: 1
Loc: Madrid - España - Europe
Hi there! Im new here, I am very fan of oil stuff and oil info, but I am new in the "car" world (I came from the motorbike world, where I already have many knowledge,,, but cars are too different!)

well... I am on the everyones search: find the best oil for my car.

I know that more "racing" oil doesn't mean better. I also know that its not recomendable to change manufacturer viscosity grade.

1. I have a Subaru Impreza WRX 2007: its a 4 flat cylinder (bóxer) turbo, awd, stock engine (240hp) with 94.000km

2. My owners manual says 5w30. The past car owner used cheap 5w30, but I am not that kind of user/driver and I do concern about oil, and I want to use the best one.
It also says A1/A2/A3 ACEA
it also says GF-3/GF-4 ILSAC
it also says SM/SL API

3. I live in Madrid, Spain (Europe) ... winter is about -10 to 0 degrees and summer 20 to 45 degrees (yes, its that extreme) .... but I use to travel a lot to the Pyrinees (mountains between France and Spain) because I am ski instructor, so I use the car in snow conditions; up to -20 degrees or more. But in another hand, I also use the car to tow my motorbike in the summer season to go racing on circuits, that could mean 400km drive travel with 35/40 degrees outside towing a big sport motorbike with the AC on (big effort to the car)

4. I drive all ways, but to be more precise
> 40% slow "engine-friendly"
> 20% dynamic but "engine-friendly" (fast around the city, enjoying with friends and SubaruClub etc)
> 20% long (+500km) highway trips at 140-160 km/h cruise
> 20% hard sporty way twisty mountain roads
I also can be in a high dense traffic Madrid city center (very rare but could happen) or as I told before; very cold snow circunstances.

5. My daily drive I don't really know because I used to go on bike everywhere ,,, but I guess it could be short trips (less than 50km) ... 50% city 50% highway ..

6. My car model its very known to have piston failure (very bad quality stock internals ... I have it stock, so it should be less proper to have any failure, but the typical known issue its there ... in the subaru forums use to say if the oil consume gets to higher, you should look your engine ... my Subaru does not consume a lot (1 litre in 6/7/8.000 km moreless ,, not very accurate sorry) ... also bearing rods are known to fail when lubrication its not good ... and its a car that is very critical to high engine temperature....... all this is the reason I want to use a very very good oil.

My preferences are 100% synthethic, I am looking for Ester base, group V, not SM but yes SL API, high quality engine, not problem about the €€ cost, and want to change it every 10.000km as the manual says ,,, I dont want to up the viscosity ,,, I want to continue with 5w30.. i think the engine its young enough to still use what the manual says.

As I said, I came from the motorbike world ... and I find that Castrol Motul, and many other "comercial" brands ... are very bad quality oils .... at least in bikes .... while brands like Motorex (swiss made), Silkolene, etc are very good. I use on my zx6r Kawasaki the 100% synth Silkolene oil, and its superb and I loved .... so I guess that the car oil brand behind Silkolene: FUCHS, will be also a very good brand/choice. I read about the Fuchs Supersyn longlife 5w30 .... but couldn't find too much information (viscosity on work temperature, TBN, base group etc etc)

Also read about Liqui Moly is very good ... so does Valvoline .... Mobil 1, Redline and Royal Purple also know they are very good, but some Subaru owners claim some issues with these brands ...

To finish ... I am looking for a Fuchs brand oil that fits all my car/use/drive description ... instead of that, what you think about Liqui Moly? ... which will be the model in Liqui Moly wich feats my needs? .. or, wich is the Liqui Moly model that is 3w50, ester base group V and SL api ?

Instead of those oils, which ones more should I check or see?

Thank you very much

Edited by Felman (07/25/17 06:53 PM)

#4470335 - 07/25/17 07:20 PM Re: What oil should I use for my Subaru Impreza? [Re: Felman]
skyactiv Offline

Registered: 03/02/13
Posts: 4007
Loc: The Midwest
Use an oil that meets VW 502 or the Porsche A40 spec.
Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual

#4470342 - 07/25/17 07:30 PM Re: What oil should I use for my Subaru Impreza? [Re: Felman]
PimTac Offline

Registered: 03/04/17
Posts: 2950
Loc: Soviet State of Washington
What makes Castrol and Motul bad oils? First time I've heard Motul described that way.
2017 Mazda CX-5 GT. Idemitsu 0w-20 factory fill. Factory Denso filter.

#4470382 - 07/25/17 08:20 PM Re: What oil should I use for my Subaru Impreza? [Re: Felman]
SilverFusion2010 Offline

Registered: 06/29/11
Posts: 1485
Loc: Crawfordville FL
A 5w-40 should serve well in that engine.
2010 Ford Fusion SE 3.0L V6, 175k miles M1 AFE 0w-20

#4470425 - 07/25/17 09:03 PM Re: What oil should I use for my Subaru Impreza? [Re: Felman]
TinyVoices Offline

Registered: 09/12/16
Posts: 448
Loc: Vienna, VA
Rotella t6. Consult any Subaru forum for thousands of confirmations on this recommendation.
1993 Toyota MR2 Hardtop N/A - 157k miles - Valvoline Max Life 5w30
2006 Toyota Matrix XR AWD (Fiancee) - 126k miles - Valvoline Max Life 5w30

#4470493 - 07/25/17 10:25 PM Re: What oil should I use for my Subaru Impreza? [Re: Felman]
NormanBuntz Offline

Registered: 07/27/13
Posts: 1925
Loc: Outer Banks, NC
Shell Helix or Total Quartz, both easily available to you.
"What is it, the first hole I dug?"
2017 Honda Odyssey SE
2013 Honda Accord LX
2007 Honda Ridgeline RTS
2007 Infiniti M35

#4470639 - 07/26/17 07:17 AM Re: What oil should I use for my Subaru Impreza? [Re: Felman]
bluesubie Offline

Registered: 08/04/03
Posts: 2245
Loc: NJ
An xW40 from any of the brands you mentioned including Motul and Castrol. Also agree with the Total and Shell recommendation. I'd lean towards a 0W40 for year round use.
'04 Subaru Forester 2.5XT
Castrol Edge 0W-40

#4470697 - 07/26/17 08:38 AM Re: What oil should I use for my Subaru Impreza? [Re: Felman]
NGRhodes Offline

Registered: 01/06/13
Posts: 241
Loc: .
I get 2 months of sub zero C mornings, I found 0w noticeable easier on the battery and would turn the engine over much easier than a 5w for winter starts.
As mentioned look out for meeting some of the more robust standards such as Porsche A40 and/or MB 229.5. I suspect this will limit you to Xw40 oils.
I would not worry about the brand too much as long as its a known reputable brand.

One other oil to mention is Shell Helix Ultra 5w40, which seems to be close to a 0w40.