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Old 04-24-2014, 02:29 PM   #1
WRXImprezaNorway
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Default 05 WRX With a drinking problem.

Hello dear friends, what oil would you recommend for an old 05 WRX with more than 175000 miles on it? She's been drinking a lot lately (last 2 years really), and it's starting to become a problem. She's up to 1L per 700-900 kilometers. I don't know what that is in miles.

I've been driving mostly on Castrol 5w30 and 5w40, since that is what the local dealership here told me to run. Mind you i live in Norway, we have -30 degrees celsius in winter here, and up to +35C in the summer.

I started thinking (about 2 years ago) that it was the turbo drinking up all the oil, but I should think the turbo would've been killed by now.

Car is completely stock, engine wise. Not a single engine part has been changed since 2005.

I thank you for your responses

PS:
She boosts about 0.6-0.7 BAR, which if google is correct, should translate to 8.702 PSI. Whats normal for a 05 WRX?
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Last edited by WRXImprezaNorway; 04-24-2014 at 02:33 PM. Reason: turbotalk
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Old 04-24-2014, 02:45 PM   #2
fastnoypi
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check your pcv system. The pcv may have gotten stuck open.
Also might consider a compression test, alot of oil consumption may indicate a cracked ringland.
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Old 04-24-2014, 03:02 PM   #3
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Thanks, didn't think of pcv. I have checked everything for leaks though, nothing leaky anywhere, I am very tidy with cleaning up / using rubber renewer on all silicone hoses etc.

If the rignland had cracked, and I've now had this problem for about 2 years, wouldn't my engine have seized already?
Just curious, I actually don't know.

I have a bit of blue smoke coming from the exhaust when I start the engine, if the engine is cold and also it is cold outside (down in the zeros and below), but I assume this is normal?
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Old 04-24-2014, 03:45 PM   #4
fastnoypi
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We had a brutal winter this year in the northeast but perhaps not as cold or as long as a duration you may typically get. My blowby oil was solidifying at my pcv causing it to stick.
I eliminated the whole system as i dont see a need to burn the blowby oil and gum up my intake valves. I routed my crankcase breather to a catch can.
You can do something similar or just clean your pcv.

If a ringland has cracked, it would just run crappy but not necessarily seized unless you don't top off with oil.

My guess is the blue smoke is from crank case blowby oil that has puddled behind your intake valves and getting burnt.

Good luck! Tell us what you find.
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Old 04-24-2014, 04:31 PM   #5
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I will second on getting the pcv/compression checked. I noticed I burned a touch of oil on cold starts, replaced the pcv and it went away?
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Old 04-24-2014, 04:34 PM   #6
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Quote:
Originally Posted by fastnoypi View Post
check your pcv system. The pcv may have gotten stuck open.
This would not cause the issue. I run an open PCV and have been for years. Doesn't consume any more than .5 quart every 4500 miles.

Compression and leak down are in order. If those are good check the turbo for blown seals.
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Old 04-24-2014, 04:41 PM   #7
codesoccer
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As far as boost that's low, seems like wastegate pressure. Stock is 13.5
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Old 04-24-2014, 04:50 PM   #8
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I just drove my car not 10 minutes ago, it actually boosts 0.7 (10.15 PSI), I just had to tilt my head a bit! Really, 13.5 is stock? It's never been that high since I've had my boost gauge.. Always been 9 / 10 PSI ish... keep in mind it has gone 175k with just normal services.. I did tell my local subaru dealership that i wanted them to look at my turbo last year, when i worked 300 hours a month and i had no way of getting this done myself..
They took it in, and gave it back, then i asked "how did it look?", and they said, and I quote: "We were afraid to open it because the screws mounting the turbo in place was rusty, so they might break". Some mechanics..

Anyways, when I took my drive just now, I checked, no blue smoke from oil filler cap, no smoke from exhaust, runs just fine.
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Old 04-24-2014, 05:03 PM   #9
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Quote:
Originally Posted by Brother EddieJ. View Post
This would not cause the issue. I run an open PCV and have been for years. Doesn't consume any more than .5 quart every 4500 miles.

.
explain your open PCV setup.

If my stock PCV would be stuck open, crankcase blowby would have no where to go but into the vac of intake manifold and consume oil.
Granted, i do have forged pistons so it does have more blowby than regular ones when its cold.
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Old 04-24-2014, 05:26 PM   #10
Subian
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Quote:
Originally Posted by WRXImprezaNorway View Post
I just drove my car not 10 minutes ago, it actually boosts 0.7 (10.15 PSI), I just had to tilt my head a bit! Really, 13.5 is stock? It's never been that high since I've had my boost gauge.. Always been 9 / 10 PSI ish... keep in mind it has gone 175k with just normal services.. I did tell my local subaru dealership that i wanted them to look at my turbo last year, when i worked 300 hours a month and i had no way of getting this done myself..
They took it in, and gave it back, then i asked "how did it look?", and they said, and I quote: "We were afraid to open it because the screws mounting the turbo in place was rusty, so they might break". Some mechanics..

Anyways, when I took my drive just now, I checked, no blue smoke from oil filler cap, no smoke from exhaust, runs just fine.
If it's a td04 with the stock boost controller, sometimes you need to adjust the wastegate actuator rod to put more tension on the wastegate spring to get your boost target.
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Old 04-24-2014, 08:53 PM   #11
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Quote:
Originally Posted by fastnoypi View Post
explain your open PCV setup.

If my stock PCV would be stuck open, crankcase blowby would have no where to go but into the vac of intake manifold and consume oil.
Granted, i do have forged pistons so it does have more blowby than regular ones when its cold.
Valve pulled. Fitting in it's place. Hose. Reducer fitting. Hose. Catch can to vac source.

Not excessive blow by. Cans get cleaned every 6 months. Most of the time they are 1/2 full.
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Old 04-25-2014, 07:45 AM   #12
fastnoypi
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Quote:
Originally Posted by Brother EddieJ. View Post
Valve pulled. Fitting in it's place. Hose. Reducer fitting. Hose. Catch can to vac source.

Not excessive blow by. Cans get cleaned every 6 months. Most of the time they are 1/2 full.
There you go, it is assumed the OP has a stock PCV system in place.
If his PCV is stuck open, his vac source is the direct connection to the intake manifold. It is a much stronger vac source to suck his blowby oil than using the inlet as a vac source in anyone's catch can setup.
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Old 04-25-2014, 12:41 PM   #13
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Quote:
Originally Posted by Subian View Post
If it's a td04 with the stock boost controller, sometimes you need to adjust the wastegate actuator rod to put more tension on the wastegate spring to get your boost target.

Ok I did some reading about the wastegate actuator and I figured I'm gonna try to adjust it.

But before I do, can anyone answer this:

Will i f**k up my engine if i mess this up? I have a turbogauge and I can look at it to see if I get too much turboload / too little, im just worried that if i do this I'll ruin something..

Anyways, more info on the WG actuator rod would be helpful I'm more interested in this now, than the fact that the car eats a bit more oil than it's supposed to :P
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Old 04-25-2014, 01:37 PM   #14
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If you have no boost leaks, i would leave the wastegate actuator alone and let a tuner adjust the boost duty cycle accordingly through opensource tuning.
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Old 04-25-2014, 01:44 PM   #15
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Ok I'll follow your advice.

I may mention, on my way home from work now, I stopped by my GF's work, and let my car idle for about 30 minutes, it was a pretty hot day today, and the heat gauge in my dash went to a place it's never been _ever_ before.. It i usually in the middle, but after idling it was a bit above the upper "white" line in the middle section.. i immediately turned the key and opened my hood to check for coolant leaks or anything like that, nothing.. then when i got back in (2 minutes later) it was in the middle again.
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Old 04-25-2014, 04:25 PM   #16
Brother EddieJ.
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Quote:
Originally Posted by fastnoypi View Post
There you go, it is assumed the OP has a stock PCV system in place.
If his PCV is stuck open, his vac source is the direct connection to the intake manifold. It is a much stronger vac source to suck his blowby oil than using the inlet as a vac source in anyone's catch can setup.
Touché good sir. I did not think of that at all. You are correct.
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Old 04-26-2014, 06:15 PM   #17
Shiftace420
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What altitude are you running the car? 10psi is about right at 9000' or so on stock ecu/engine.

Your ECU will turn the boost down some as you go up in altitude to save on detonation.

If you disconnect your BCS at the tee near your turbo and plug hose and tee: Your running mechanical wastegate boost control. You should go drive it and watch your gauge. You will see 6-7psi max if your wastegate is set properly. Don't just start messing with the arm unless your mechanical boost levels are different then 6-7psi (Just about .04-.05mpa on your stock gauge)

You can adjust the arm to reach the 6-7psi needed. Tighten the arm to increase pressure or loosen to decrease.

Last edited by Shiftace420; 04-26-2014 at 06:21 PM.
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Old 04-29-2014, 07:03 PM   #18
Beauch
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before messing with wastegate. check all.....I mean all your vacuum and boost lines. seems like your running wastegate pressure verses full boost. then look for other alternatives.
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