Welcome to the North American Subaru Impreza Owners Club Tuesday March 26, 2019
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo)

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 01-22-2019, 04:37 PM   #1
subopolois
Scooby Newbie
 
Member#: 421572
Join Date: May 2015
Default oil usage/"burning"

I have my 2012 STi and just checked oil level. It was lower than what it should be and what i like. This isnt the first time its happened.
I did some research and apparently subaru stands by the belief that it is normal for their cars the use 1 quart oil for every 1000-1200 miles driven.
No I havent kept track of how much i top it up, but i feel like it hasnt been 1 quart/1000-1200 miles (less oil than this).

Also I dont smell any burning oil from the exhaust or engine bay.

My question is is this normal, does anyone else have this oil usage problem? I understand as cars get older they tend to g through more oil.
* Registered users of the site do not see these ads.
subopolois is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 01-22-2019, 06:26 PM   #2
CarmelValleyWRX
Scooby Specialist
 
Member#: 453872
Join Date: Sep 2016
Vehicle:
2005 wrx wagon
48w

Default

the boxer tends to eat lots of oil. i think because the oil sits on the cylinder walls and goes into the combustion chamber easier than an upright engine. also the PCV system sucks lots of blow by gasses/oil mix into the intake.
CarmelValleyWRX is offline   Reply With Quote
Old 01-22-2019, 11:54 PM   #3
welding rod
Scooby Newbie
 
Member#: 116108
Join Date: May 2006
Default

In over 35 years of driving and having owned dozens of vehicles, I can remember only one, a high mileage 1973 Jeep CJ5 with AMC 304, that required the addition of ANY oil between oil changes, and my historic oil change intervals have been 5,000 miles (most vehicles) to 8,000 - 9,000 miles (for my 2013 Jeep with ~125,00 miles on it). My 2019 STI has 2,000 miles on it and is still almost at the full mark on the dip stick... almost exactly where it was when I first got it.

I would consider an engine that used 1 quart per 1,000 miles to have some kind of problem.

Last edited by welding rod; 01-23-2019 at 12:09 AM.
welding rod is offline   Reply With Quote
Old 01-23-2019, 06:18 AM   #4
rtv900
Scooby Specialist
 
Member#: 428511
Join Date: Aug 2015
Location: philadelphia
Vehicle:
2016 STI

Default

at 75k my sti still consumes no oil between 5k intervals

IMO any vehicle around 150k + will begin consuming oil either due to slight leakage or just plain consumption

and no, you will not see or smell this unless it is absolutely out of control
rtv900 is online now   Reply With Quote
Old 01-23-2019, 07:35 AM   #5
Jay11STI
Scooby Newbie
 
Member#: 492422
Join Date: Oct 2018
Default

It is normal for any forced induction car to consume oil but subaru engines are very well known for this issue. I would highly recommend keeping up with checking your oil. I would advise you check your oil every fill up so you get an idea of how much it consumes a week and over the course of an oil change interval. If this becomes an excessive consumption, it may be time for a compression and leakdown test to determine engine health.

My car is a 2011 sti with 60K on the clock and it does not consume any oil between 3K oil change intervals.
Jay11STI is offline   Reply With Quote
Old 01-23-2019, 07:43 AM   #6
Turpid Porpoise
Scooby Specialist
 
Member#: 476573
Join Date: Oct 2017
Chapter/Region: MAIC
Location: Virginia
Vehicle:
2008 Impreza WRX STi
Silver

Default

Check for leaks if you can't smell any oil being burned.

Do you have an AOS?
Turpid Porpoise is offline   Reply With Quote
Old 01-23-2019, 09:01 AM   #7
Charlie-III
NASIOC Supporter
 
Member#: 30669
Join Date: Dec 2002
Chapter/Region: Tri-State
Location: USA, North NJ, 07456
Vehicle:
1998 Legacy 2.5GT
Silver Sleeper BK, 5MT

Default

Quote:
Originally Posted by CarmelValleyWRX View Post
the boxer tends to eat lots of oil. i think because the oil sits on the cylinder walls and goes into the combustion chamber easier than an upright engine. also the PCV system sucks lots of blow by gasses/oil mix into the intake.
Flat engines have a higher tendency to burn oil more than other engines. Whether it's a Subaru, Porsche or aircraft engine.
Not a guarantee it WILL go through more oil, but is more likely.

Quote:
Originally Posted by Jay11STI View Post
It is normal for any forced induction car to consume oil but subaru engines are very well known for this issue. I would highly recommend keeping up with checking your oil. I would advise you check your oil every fill up so you get an idea of how much it consumes a week and over the course of an oil change interval. If this becomes an excessive consumption, it may be time for a compression and leakdown test to determine engine health.

My car is a 2011 sti with 60K on the clock and it does not consume any oil between 3K oil change intervals.
Yes, keep an eye on the level of oil, log mileage every time you add so you know the consumption rate.

Yes, most engines I would be concerned at having to add much oil between changes.
Charlie-III is offline   Reply With Quote
Old 01-23-2019, 10:05 AM   #8
Zcypot
Scooby Specialist
 
Member#: 372777
Join Date: Nov 2013
Chapter/Region: SCIC
Location: Compton, CA
Vehicle:
2014 WRX Sedan Lmtd
WRB

Default

Mine eats a lot of oil, but I hammered it a lot and run higher boost than stock. I have an AOS too. Which reminds me, I need to go buy another quart...
Zcypot is offline   Reply With Quote
Old 01-24-2019, 04:54 PM   #9
danger1138
Scooby Specialist
 
Member#: 279525
Join Date: Apr 2011
Chapter/Region: Tri-State
Location: QUEENS NY
Vehicle:
06 Fxt

Default

Yea a little less than 1 qt between oil changes seems right at least in my case. Built bottom end and i like to engine brake alot, not sure if that makes a difference or not.
danger1138 is offline   Reply With Quote
Old 01-24-2019, 05:02 PM   #10
Waddlz
Scooby Specialist
 
Member#: 395275
Join Date: Jul 2014
Chapter/Region: RMIC
Location: Brighton, CO
Vehicle:
2012 STi
SWP

Default

GM also considers 1 quart of oil per 1000 miles to be normal oil usage. I had them do an oil consumption test on my wifes Colorado with the V8 and they said it was well within normal parameters.

We traded it in
Waddlz is offline   Reply With Quote
Old 01-24-2019, 06:45 PM   #11
RaPower
Scooby Newbie
 
Member#: 496698
Join Date: Jan 2019
Location: Texas
Vehicle:
2007 WRX Wagon
Black

Default

If I remember correctly a lot of oil gets into the intake through the PCV system on the wrx/sti. There are some good catch cans on the market. Helps clean up emissions too
RaPower is offline   Reply With Quote
Old 01-24-2019, 08:58 PM   #12
CarmelValleyWRX
Scooby Specialist
 
Member#: 453872
Join Date: Sep 2016
Vehicle:
2005 wrx wagon
48w

Default

i made a "catch can" out of an old oil quart bottle. it caught a good 1/3quart in a week. i bought an IAG AOS.
CarmelValleyWRX is offline   Reply With Quote
Old 01-25-2019, 07:25 AM   #13
Jay11STI
Scooby Newbie
 
Member#: 492422
Join Date: Oct 2018
Default

Another thing to consider would be oil thickness. Alot of guys use 5w-40 in their sti's including myself.
Jay11STI is offline   Reply With Quote
Old 02-14-2019, 01:22 PM   #14
jake07wrx
Scooby Newbie
 
Member#: 497779
Join Date: Feb 2019
Chapter/Region: MWSOC
Location: missouri
Vehicle:
07 impreza wrx TR
wrb

Default

With my '07 WRX TR I go through about a quart on oil a week. Not sure if that much is normal, but still looking for advice/help. thanks
jake07wrx is offline   Reply With Quote
Old 02-14-2019, 01:28 PM   #15
Charlie-III
NASIOC Supporter
 
Member#: 30669
Join Date: Dec 2002
Chapter/Region: Tri-State
Location: USA, North NJ, 07456
Vehicle:
1998 Legacy 2.5GT
Silver Sleeper BK, 5MT

Default

Quote:
Originally Posted by jake07wrx View Post
With my '07 WRX TR I go through about a quart on oil a week. Not sure if that much is normal, but still looking for advice/help. thanks
Oil usage over time means crap......oil usage over distance means something.
Some peeps do 100 miles in a week, others do over 1000 miles in a week.
Charlie-III is offline   Reply With Quote
Old 02-14-2019, 11:13 PM   #16
BigWrecKs
Scooby Newbie
 
Member#: 93830
Join Date: Aug 2005
Chapter/Region: South East
Vehicle:
11.5 New Balance
Shoes

Default

Quote:
Originally Posted by jake07wrx View Post
With my '07 WRX TR I go through about a quart on oil a week. Not sure if that much is normal, but still looking for advice/help. thanks


Not normal at all.

Even if you drive 1000 miles/week.
BigWrecKs is offline   Reply With Quote
Old 02-15-2019, 02:22 AM   #17
JBoogs
Scooby Newbie
 
Member#: 497813
Join Date: Feb 2019
Default

Compression test all 4 cylinders and see if all are balanced, if you find a low cylinder, might have a broken ringland.
JBoogs is offline   Reply With Quote
Old 02-17-2019, 01:00 AM   #18
welding rod
Scooby Newbie
 
Member#: 116108
Join Date: May 2006
Default

My 19 STI just got its first oil change today at 3,300 miles. I have checked the oil with every tank of gas, at the same spot inside my garage after having driven to achieve normal operating temp, then waiting about 5 minutes. Today before the oil change the oil level was still pretty much at the full mark - it was slightly above the full mark when brand new. So the oil level dropped about 1/8" (3 mm) on the stick in 3,300 miles, and that included break-in and then plenty of boosting.
welding rod is offline   Reply With Quote
Old 02-17-2019, 01:27 PM   #19
the_saintusa
Scooby Newbie
 
Member#: 171486
Join Date: Feb 2008
Chapter/Region: International
Location: Hiding from The Google
Vehicle:
2004 WRX STI
Silver

Default

Quote:
Originally Posted by rtv900 View Post
at 75k my sti still consumes no oil between 5k intervals

IMO any vehicle around 150k + will begin consuming oil either due to slight leakage or just plain consumption

and no, you will not see or smell this unless it is absolutely out of control
No appreciable drop in oil levels between changes on my 04 STi.

On the 'rebuilt' engine (currently less than 10k miles) it has used zero appreciable oil between changes at 4-5k intervals (albeit only 2 changes, after break-in).

On the original engine the turbo (70k miles) was the source of oil loss in the months leading up to a rebuild. It was noticeable with a James Bond cloaking cloud under heavy boost. I parked the car for 2 years until I decided what to do, as it also developed a CEL for a misfire. I was convinced I had a bad ring landing, and I knew I needed a turbo (rebuild/replacement). Finally got to a point I wanted to drive the STi again as I was driving my C63 in the winter and wanted the STi as the winter beater.

The original motor had compression numbers of 145 across the board, and leak down values of 4% across the board which made me both happy and sad. Why replace an engine in good shape? Why not? The cause of the CEL ended up being the connector to the injector.

The oil consumption was never a problem until the turbo decided to go

Regardless, a new SB was built and installed (the original one in excellent shape was sold) and I continue to check the oil levels on a regular basis.
the_saintusa is offline   Reply With Quote
Old 02-22-2019, 12:58 AM   #20
slow.wagon
Scooby Newbie
 
Member#: 484841
Join Date: Apr 2018
Chapter/Region: MAIC
Location: Maryland
Vehicle:
2008 WRX STI
Lightning Red

Default

In my experience, they all burn oil, even brand new ones.
slow.wagon is offline   Reply With Quote
Old 02-26-2019, 07:24 AM   #21
soonchefmike1
Scooby Newbie
 
Member#: 498303
Join Date: Feb 2019
Default

I agree, check for leaks. It may be pooling in not so obvious places. If you have that plastic splash guard under your vehicle, I would take it off and do a thorough inspection.
soonchefmike1 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 06:26 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2019 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.