Subaru oil...3750 on synthetic?

[Stewart Fan]

Subaru recommends a 3750 mile OCI and 5w30 synthetic on my 2011 Outback with the 2.5 liter NA engine.

Is it just me or does that seem like an awfully short OCI for synthetic,even if it is severe service?

First change will be with Mobil 1 5w30 I have left over from a previous vehicle.

 

[musicmanbass]

That sounds stupid short for a naturally aspirate, relatively mildly tuned motor. Of course, your warranty may depend on it.

 

[musicmanbass]

Does it say you HAVE to use synthetic? If it is simply recommended and not required.... it'd be PZYB or Valvoline conventional @ 3.5k intervals for me!

 

[oggb]

Subaru *recommends* but does not *require* synthetic. If I had that car/engine combo I'd use whatever 5w30 was cheapest. No way I'd dump synthetic at 3750 mile intervals in an engine known to be easy on oil.

 

[Stewart Fan]

Originally Posted By: musicmanbass
Does it say you HAVE to use synthetic? If it is simply recommended and not required.... it'd be PZYB or Valvoline conventional @ 3.5k intervals for me!

Recommended not required. The manual also states that 5w30 or 5w-40 conventional is acceptable as long as you go back to synthetic at the next change.

 

[musicmanbass]

Whaaaaaa? Can you post exactly what the manual says?

Does it really say you can use conventional, only if you use synthetic next time? Like.... go back and forth all the time or something?

I'm not one who believes you have to pick one and stick with it, but being told to alternate is a bit weird, imho.

 

[tenderloin]

2.5L Outback, Legacy, Impreza non-turbos: replace at least every 7500 miles/7.5 months, or every 3750 miles or 3 3/4 months under severe driving
Severe driving is
> Repeated short trips, stop-and-go, extensive idling
> Rough, muddy, dusty, wet, humid, cold, mountainous, salty conditions (basically any country or winter driving)
> Towing a trailer.

 

[Stewart Fan]

Originally Posted By: musicmanbass
Whaaaaaa? Can you post exactly what the manual says?

Does it really say you can use conventional, only if you use synthetic next time? Like.... go back and forth all the time or something?

I'm not one who believes you have to pick one and stick with it, but being told to alternate is a bit weird, imho.


Alright,I'm a knucklehead.


Here is what the manual says. "If 5w30 synthetic oil is not available, 5w30 or 5w-40 conventional oil may be used if replenishment is needed but should be changed to 5w30 synthetic at the next oil change"

I missed the "replenishment" part of the statement.

Basically Subaru recommends synthetic 5w30,but conventional is also acceptable if synthetic is unavailable.

 

[FZ1]

Come on. It's a 25,000 car. Use the synthetic at the severe service interval.

 

[dparm]

I would stick to their recommendation during the warranty period. After that, a used oil analysis will help guide you to the proper interval.

 

[crazyoildude]

3750 oci is some car companies that try to cancell warantees due to the maintanence factor..3750 miles is a waste the oil is still good

 

[chubbs1]

Just use Pennzoil conventional it is a grp. II+. What is "synthetic" if you really want to get down to it...is it Grp. III, IV or V? Just use a name brand SN conventional.

 

[Garak]

Originally Posted By: chubbs1
What is "synthetic" if you really want to get down to it...is it Grp. III, IV or V? Just use a name brand SN conventional.


Agreed. Should they use GC or Mobil Delvac 1 to ensure a healthy dose of Group IV, while unfortunately avoiding GF-4 or GF-5? Or should they try a Group V RedLine?

It would appear that the Subaru manual has a really bone headed way of wording things, as do a lot of manuals for Japanese cars. They'll specify the SM/GF-4 or better along with a viscosity as required parameters, then they'll spout some nonsense about synthetic being recommended, required, or recommended against. I'd really like to meet some of the editors of these manuals. If things aren't written in Chinglish, then they have metric, Imperial, and US measures completely convoluted and nonsensical.

If it requires SM/GF-4 or better, I don't understand how they could prohibit "synthetics," since the definition is loose at best. The RX-8 requires SM/GF-4 5w-20, but advises against synthetics or even synthetic blends. Okay, how many 5w-20 oils aren't a synthetic blend?

If they want to require a synthetic, create a specification like dexos1 or one of the MB, BMW, or VW/Audi specifications. If they talk about using a 5w-40, how does that reconcile with using an SM/GF-4 or better, considering 5w-40 isn't a resource conserving grade?

Dexos1 certainly has its irksome points about it, but at least in that case, if you pick up a relatively new bottle of PP or M1 in 5w30, you know you're in the ballpark.

 

[Pop_Rivit]

We have a 2006 Outback with the 2.5 NA engine, and I've changed it twice a year since since we purchased it with 20,000 miles on the odometer with whatever name brand I find on sale (usually Pennzoil or Quaker State). It will turn over to 100,000 sometime in the next month and there are no issues whatsoever, nor do I anticipate any. OCI's usually work out to between 5,000 and 7,000 miles.

Originally Posted By: FZ1
Come on. It's a 25,000 car. Use the synthetic at the severe service interval.


Why would someone want to waste that much money when it's not needed?

 

[bluesubie]

IMO, you won't have any warranty issues running 7,500 mile intervals on the Mobil 1.

-Dennis

 

[Boss302fan]

3750 is for severe service? My wifes Hyundia dealer recommends this on all new vehicles but how many actually are driven this way... My wifes is mostly highway and I am assuming most other people are the same.

I would recommend 4K-5K miles with conventional oil or 7500K miles with syn...

 

[addyguy]

Originally Posted By: FZ1
Come on. It's a 25,000 car. Use the synthetic at the severe service interval.


+1. You spend all that money on a brand-new car, and then complain about the $30-50 price of a syn oil change?

Get real.

 

[Durango]

Originally Posted By: Stewart Fan
Subaru recommends a 3750 mile OCI and 5w30 synthetic on my 2011 Outback with the 2.5 liter NA engine.

Is it just me or does that seem like an awfully short OCI for synthetic,even if it is severe service?

First change will be with Mobil 1 5w30 I have left over from a previous vehicle.


Stewart Fan,

Your engine may be hard on motor oils so that's why maybe they recommend a synthetic. Can you use Mobil "Super"????? This oil is offered on a synthetic form and the rpice is better than the typical Mobil 1. It might be good enough for your needs.

Durango

 

[NYSteve]

You should write Suburu of North America and get it in writing from them of what they mean. Document Document Document!

 

[Eddie]

The NEW Subaru 2.5L has a chain drive for the 4 camshafts and the oil requirements are different than the belt designed engine. Read the manual carefully and follow it. Sabaru may just be conservative with this engine until customer miles build. I also thought the chain engine required a 0w20 oil? I wish someone would copy the oil reqirment page to this site for us.