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Old 08-14-2019, 08:40 AM   #1
BooostedNooob
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Member#: 504940
Join Date: Aug 2019
Chapter/Region: MWSOC
Vehicle:
2015 WRX
Black

Default Burning Oil/Oil disappearing

Hey guys, just purchased a 2015 WRX with a few mods about 3 weeks ago. Initially when I got the car I noticed blueish smoke coming from exhaust(catless) on startup and on heavy revs. About a week into having the car the low engine oil light came on, so I topped it off, the light came on about a day after putting a full quart in. I put 2 quarts in the next day and completely changed the oil.


Now-- A week later, after switching to Rotella T6, I have noticed significantly less smoke/oil smell. But my low engine oil light just came on again, after around 500-600 miles!! I know burning oil is common but no way my car is supposed to burn a quart every 500 mi???! There are no visible spills and engine bay is cleeeaaan.

Please help, i've purchased a Perrin Turbo Sump Restrictor and am throwing that on hoping to combat the issue atleast a little bit. Am lost in the next step to take.. Compression test? AOS? Catch Can? Part out??

any advice is welcomed, thank you.
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Old 08-14-2019, 01:45 PM   #2
JayCee.FA20
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First off its catless, second off it takes 5 quarts to do a full oil change... third, since youre catless and you must be liking the turbo going off, you should literally do an oil change every 2K Miles.
From my understandings from your forum, you probably bought this WRX used and possibly put on the catless j pipe, did you remove the restrictor pill? Do you have a cobb accessport? If you dont have a cobb accessport and unable to run on an OTS map until you get protuned. Youre making your car either run rich or going lean.
Should do researching before you started to mod the car
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Old 08-14-2019, 02:09 PM   #3
BooostedNooob
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Quote:
Originally Posted by JayCee.FA20 View Post
First off its catless, second off it takes 5 quarts to do a full oil change... third, since youre catless and you must be liking the turbo going off, you should literally do an oil change every 2K Miles.
From my understandings from your forum, you probably bought this WRX used and possibly put on the catless j pipe, did you remove the restrictor pill? Do you have a cobb accessport? If you dont have a cobb accessport and unable to run on an OTS map until you get protuned. Youre making your car either run rich or going lean.
Should do researching before you started to mod the car
Sorry for not being more clear; I have not done anything to the car except for a turbo sump restrictor that I installed literally 20 minutes ago. It does also have an accessport that I forgot to mention along with a pro tune. I have done plenty of research and am asking a question that is 100% relevant to my car to try and find the source of the problem..

Also, I meant topped off with 2 quarts not change with 2. I filled it with 5 full quarts per OEM instructions..

After speaking with people I think it may be my valve seals. I am going to the dealer tomorrow and will update the post for anybody having this issue in the future.
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Old 08-14-2019, 03:07 PM   #4
JayCee.FA20
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Quote:
Originally Posted by BooostedNooob View Post
Sorry for not being more clear; I have not done anything to the car except for a turbo sump restrictor that I installed literally 20 minutes ago. It does also have an accessport that I forgot to mention along with a pro tune. I have done plenty of research and am asking a question that is 100% relevant to my car to try and find the source of the problem..

Also, I meant topped off with 2 quarts not change with 2. I filled it with 5 full quarts per OEM instructions..

After speaking with people I think it may be my valve seals. I am going to the dealer tomorrow and will update the post for anybody having this issue in the future.


Im curious what mods do you have on your car
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Old 08-14-2019, 03:40 PM   #5
willthetech
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How many miles? and did you buy this Private or dealer?

is the blue smoke all the time or just for a few minutes after start up?

is looking like a short block replacement...
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Old 08-14-2019, 04:09 PM   #6
BooostedNooob
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Per previous owner it has a Factory turbo with ported housing and billet wheel, outfront motors shortblock with manley turbo tuff I beams and cp forged pistons. "upgraded clutch' catless downpipe, air intake and ebcs along with a pro tune..

I was getting some smoke with a blueish tone but chalked it up to the lack of cats. I installed the turbo sump and changed to Rotella T6 and that took care of most of the smoke..

I spoke with a mechanic and he said its normal for subies to burn about a quart per 650mi based on his experience? could I chalk it up to normal oil consumption or is that wishful thinking.. Everything runs as it should on the car otherwise..

I bought used from a dealership, I did get inspected before and it came back clean. Hopefully I wont have to rebuild my car 2 weeks after purchasing.... Welcome to the tuner life I guess?
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Old 08-14-2019, 05:09 PM   #7
Dave D.
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Quote:
Originally Posted by BooostedNooob View Post
Per previous owner it has a Factory turbo with ported housing and billet wheel, outfront motors shortblock with manley turbo tuff I beams and cp forged pistons. "upgraded clutch' catless downpipe, air intake and ebcs along with a pro tune..

I was getting some smoke with a blueish tone but chalked it up to the lack of cats. I installed the turbo sump and changed to Rotella T6 and that took care of most of the smoke..

I spoke with a mechanic and he said its normal for subies to burn about a quart per 650mi based on his experience? could I chalk it up to normal oil consumption or is that wishful thinking.. Everything runs as it should on the car otherwise..

I bought used from a dealership, I did get inspected before and it came back clean. Hopefully I wont have to rebuild my car 2 weeks after purchasing.... Welcome to the tuner life I guess?
The owner probably blew the motor and traded it in or possibly it was auctioned to the dealer. You likely have bought somebody else's problem.

Never, ever buy a used modded car from a dealer.

Best of luck, first thing is to have a good mechanic/tuner take a look at it.
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Old 08-14-2019, 05:18 PM   #8
BooostedNooob
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Black

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Quote:
Originally Posted by Dave D. View Post
The owner probably blew the motor and traded it in or possibly it was auctioned to the dealer. You likely have bought somebody else's problem.

Never, ever buy a used modded car from a dealer.

Best of luck, first thing is to have a good mechanic/tuner take a look at it.
Thanks for the reply. Trying to stay wishful and positive about it ha..

Still happy to be apart of the community and love the car, even if it has problems.
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Old 08-14-2019, 05:20 PM   #9
jasonwrx86
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Forged pistons can burn quite a bit of oil because of the expansion so they have to be undersized.
Do a compression and leak down test.
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Old 08-14-2019, 10:57 PM   #10
Abismo
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full change is 5.4qt btw.
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Old 08-15-2019, 11:12 AM   #11
willthetech
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Pearl Blue

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So what you are saying the only OEM Subaru Parts in this engine are the engine mounts...That's quite a few Mods...

You got this from a Subaru dealership?

Usually blue smoke is because oil is leaking in the combustion...but because you have aftermarket pistons, who knows if this is "normal" behavior.

Last edited by willthetech; 08-15-2019 at 11:21 AM.
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Old 08-15-2019, 01:23 PM   #12
D-rock240
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01 Legacy/03 Outback wgns

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A Few mods
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