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Old 09-27-2011, 09:42 PM   #1
sanguines
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Default 2011 WRX oil consumption

Hey,

How much oil is normal to be consumed? I'm at 30xx miles on my 11 WRX. I dropped the factory fill at 500 miles and added RP 5w40. 2500 miles later I'm about half a quart low, or the difference from F on the dipstick to a little below halfway down.

Is this about normal? Should I be concerned?
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Old 09-27-2011, 10:10 PM   #2
WRX06TR
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500 miles seems too early to switch to synthetic on a new motor. But...the Subaru motors do tend to consume oil. My car has always had some issues with oil, just stay on top of it and keep it filled up. Check it every time you fill up with gas.

Subaru claims that "normal" is a quart every 1000 miles...it seems like too much but it's what they say...
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Old 09-27-2011, 10:33 PM   #3
sanguines
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2011s come with synthetic from the factory and require synthetic...

Anyways, what's the source of the quart/1000 mile thing? It doesn't say that in the owner's manual, fwiw.
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Old 09-27-2011, 11:41 PM   #4
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Quote:
Originally Posted by sanguines
2011s come with synthetic from the factory and require synthetic...

Anyways, what's the source of the quart/1000 mile thing? It doesn't say that in the owner's manual, fwiw.
No but it has to be worse than 1qt in 1000 mi before they will do anything about it. Thats Subaru's policy anyway
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Old 09-27-2011, 11:46 PM   #5
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'11+ subarus come from the factory with full synthetic in them. Each subi is diff. I am on my 4th and each one burned oil diff. My last one was very modified and never burned a drop. My new '11 does'nt use any either. Good luck
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Old 09-27-2011, 11:49 PM   #6
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Try using a different oil than Royal Purple. People have not had good UOA's with it - it's also expensive. Try something like Shell Rotella T6 5w-40 or German Castrol 0w-30. Shell Rotella T6 can be had at Wal-Mart at $22/gallon, then pick up another quart or so to make it a 5 quart oil change. German Castrol can be had at AutoZone for about $32 for 5 quarts and a Bosch filter which is a Purolator Classic design, a very good filter at a good price.

You an also try Mobil 1 5w-40. I haven't used it yet, but people also have had good results with it.

If you search the forums, you'll find a lot of reports of people spinning bearings and high oil consumption when using Royal Purple and Mobil 1 5w-30.

I use German Castrol and I stockpile it whenever the local Autozone has it on sale. Usually I run the black Subaru OEM filter, but my stockpile of those are running out so I switched to the Purolator PureOne filter. I use about 1/2 quart per 5000 miles and my oil change interval is 7500 miles. I've also used and had good results with Shell Rotella T6 and Pennzoil Ultra 5w-40 euro formula. When I first bought the car and didn't know what I was doing, I used Mobil 1 5w-30 and it drank it like water, I think I was down a full quart every 3000 miles.
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Old 09-27-2011, 11:53 PM   #7
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RP is not THE choice for subeez. Try searching Royal Purple and you'll see that many people have consumption issues with this oil. Stay away from M1 too. IMO just stick with the factory synthetic until your warranty runs out. Don't know why you switched to RP anyways. Your car is brand new! Another option is GC 0w30 and Shell T6 5W40 is awesome too. And use OEM filters as they they are the only filter within specs of the required bypass of 23psi - very important.

Last edited by newtothescene; 09-28-2011 at 12:00 AM.
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Old 09-28-2011, 01:53 AM   #8
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Huh...I didn't know the '11 came with synthetic oil, thanks for correcting me. But I agree, all cars are different. My 06 WRX that I picked up brand new with 10 miles on it burned oil, around a quart every 3000...not a biggie but still have to stay on top of it.

My STi with forged pistons burns around 1/2 a quart per 1000 but forged pistons tend to consume more. It's all a matter of preventative maintenance.
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Old 09-28-2011, 07:41 AM   #9
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Your oil choice is fine. There's absolutely zero data here on RP 5W-40. I would have kept the factory fill in longer since it's loaded with molybdenum and that helps with break-in. Consumption may increase just from switching oil brands so be patient (as in a couple of oil change intervals).

-Dennis
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Old 09-28-2011, 08:34 AM   #10
sanguines
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Thanks guys. I topped it off, and I'll see how things play out. I'm driving ~3000 miles to DC shortly after the new year so that should be a good test of exactly what it's consuming.
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Old 09-28-2011, 08:46 AM   #11
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Quote:
Originally Posted by sanguines View Post
Thanks guys. I topped it off, and I'll see how things play out. I'm driving ~3000 miles to DC shortly after the new year so that should be a good test of exactly what it's consuming.
And listen to the man above you, as he is probably the most knowlegeable person on this forum when it comes to oils. Also do us a favor, and on the second or third oil change with the RP, get a used oil analysis kit and take a sample and send it in. When you get the results back, post a copy of test results sheet up on the forums, so we can see how the oil performs, since there is no data here on RP 40 weights.
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Old 09-28-2011, 08:47 AM   #12
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Quote:
Originally Posted by sanguines View Post
Thanks guys. I topped it off, and I'll see how things play out. I'm driving ~3000 miles to DC shortly after the new year so that should be a good test of exactly what it's consuming.
Get your oil analyzed so we can see how well it works on our cars.
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Old 09-28-2011, 09:23 AM   #13
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How did you drive during the first few hundred miles? Took it easy i assume?
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Old 09-28-2011, 10:23 AM   #14
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RP 5w40 is a good oil. The 5w30 is too thin for our cars and it will consume this weight.

You may jsut need to break your car in some more. My 2010 burned about 1/2 QT until I had 6000 miles on it. Now it does not burn any oil. I run Rotella T6 since it is cheap and has great UOA's.

RP 5w40 wont cause any problems in your car, but you will need to keep an eye on the consumption so that you don't get too low. I'm not sure what it is about RP oils, but every car I ever used it in, consumed it. Might just be on a molecular level since it is a true group 4 & 5 blend. All of the recommended oils for the Subies, including Rotella T6 are hydrocracked group 3 oils which performs almost as good as the most expensive group 4 and 5 synthetics.

My recommendation, stick with the cheap, tried, and true oil. Rotella T6. Your oil consumption will most likely stop, you can run it to 5000 miles easy(7500 isnt uncommon for stock motors and boost levels). Pickup a Purolater PureONE PL14610(larger than the PL14612) as well and you will be set.
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Old 09-28-2011, 10:35 AM   #15
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I have had no consumption with my 2011, factory oil, Motul Eco, or Rotella, I find it disturbing that some do and some don't. I am running T6 5W-40 and a Subie blue from now on.
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Old 09-28-2011, 12:02 PM   #16
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It's obviously going to depend on driving style, too.

WRX and STi should be equipped with an AOS from the factory.

I haven't decided if I care enough about that to buy an expensive aftermarket AOS for my daily driver. But it's no doubt: boxer motor + lateral gees + high rpms + boost = oil in the breather line off the outside valve cover.
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Old 09-28-2011, 12:55 PM   #17
sanguines
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Quote:
Originally Posted by n2oiroc View Post
How did you drive during the first few hundred miles? Took it easy i assume?
I mostly took it easy. A couple runs to 6k, as suggested by http://www.mototuneusa.com/break_in_secrets.htm, but nothing ridiculous. After 1000 miles, it was game on, although I still don't beat on it badly.
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Old 09-28-2011, 01:49 PM   #18
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RP has never been a good choice for cars D=
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Old 09-28-2011, 03:33 PM   #19
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Quote:
Originally Posted by erik11876 View Post
I have had no consumption with my 2011, factory oil, Motul Eco, or Rotella, I find it disturbing that some do and some don't. I am running T6 5W-40 and a Subie blue from now on.

+++ The perfect combo IMO +++
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Old 09-28-2011, 04:12 PM   #20
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From what I've always read about royal purple is that it isn't a good choices for new motors which have yet to set in piston rings and bearings and such.
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Old 09-28-2011, 05:53 PM   #21
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Quote:
Originally Posted by 2Fast4U1DAY
When you get the results back, post a copy of test results sheet up on the forums, so we can see how the oil performs, since there is no data here on RP 40 weights.
Good idea! Someone at IWSTI is running it and plans to do a uoa. That makes two people!

-Dennis
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Old 09-28-2011, 05:59 PM   #22
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Quote:
Originally Posted by nicknasser713
From what I've always read about royal purple is that it isn't a good choices for new motors which have yet to set in piston rings and bearings and such.
nicknasser FTW! Sometimes the first place we should go to for oil advice is the oil manufacturer.

http://royalpurple.com/faqs-motor-oil.html

Can I put Royal Purple into my brand new car?

Yes. Royal Purple currently offers many viscosity grades of API-licensed motor oils. To allow for proper break-in of the engine, Royal Purple recommends waiting until the manufacturer’s first scheduled oil change or a minimum of 2,000 miles in new gasoline engines.

-Dennis
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Old 09-28-2011, 07:01 PM   #23
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I just did my first oil change on my 11 sti and I used Valvoline conventional because I figured it was too early for synthetic. Should I drop the oil or wait till the next interval to change to rotella
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Old 09-28-2011, 07:16 PM   #24
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Quote:
Originally Posted by SpongeBobSquarePants
I just did my first oil change on my 11 sti and I used Valvoline conventional because I figured it was too early for synthetic. Should I drop the oil or wait till the next interval to change to rotella
Whats the current mileage? I would just wait. No point in wasting perfectly fine oil and the money that you spent on that oil.

Edit: forgot that 2011's REQUIRE synthetic. I would change it ASAP
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Old 09-28-2011, 08:26 PM   #25
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FML good thing conventional is cheap
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