Wrx MY04 oil consumption

Wrx MY04 oil consumption

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anonymous-user

Original Poster:

54 months

Sunday 27th January 2013
quotequote all
Hello,

The dream of impreza ownership has not lasted long:

After buying my impreza I checked all levels and pressures etc. oil was on the low side so I topped it up (magnates 5w30 a1 fully syn). Had a 250 mile drive so checked oil before and it was nearly at full level. Checked engine morning after long drive (cold engine) and its hovering around low line. I'm confident I'm not imagining this as I've been checking it really often. It's using an alarming amount of oil. I'm about to return home (250 miles again) and have a litre of oil with me so I will update this aft.

Exhaust has not a small amount of black on it and I think feels a bit oily/greesy at the tip. Car seems to run fine and gave 26 mpg. I can't tell if its down on power as I haven't had it long. Subaru services it about 6k ago.

I've left a message with my local scooby Motorsport guy to get it booked in next week.

I have googled tons but obviously this could be a number of things.

Any help would be greatly appreciated.

TB

_Batty_

12,268 posts

250 months

Sunday 27th January 2013
quotequote all
Does sound alarming. I've yet to fill mine (2000 miles plus track action).
Does it leave any obvious drips? Any white smoke on overrun?any moisture on the cam covers etc?

anonymous-user

Original Poster:

54 months

Sunday 27th January 2013
quotequote all
Can't see any deposits under it. I wouldn't say white smoke although its tricky to tell as its been so cold.

Ill take a look at cam covers. Just rechecked and after yesterday's 200 ml it's just below middle on dipstick. I'm sure this is not my imagination though.

anonymous-user

Original Poster:

54 months

Sunday 27th January 2013
quotequote all
Sorry that pic is orientated incorrectly. Does this look normal wrt black deposits?

rb5er

11,657 posts

172 months

Sunday 27th January 2013
quotequote all
Mine doesn`t use any and its quite old now.

Worth a recheck just in case?

Could be anything from a leak somewhere easy like sump plug, oil filter or cam covers (common problem) or even something as serious as piston rings or heavily weeping turbo seals but those would make it quite smokey from the exhaust.

Have a good check for leaks and recheck the levels I reckon, if no luck get it looked at.

All cars get a bit of black around the exhaust, that doesn`t look anything overly heavy.

Edited by rb5er on Sunday 27th January 10:36

_Batty_

12,268 posts

250 months

Sunday 27th January 2013
quotequote all
Topbox said:
Sorry that pic is orientated incorrectly. Does this look normal wrt black deposits?
Mine gets black quiet quickly to be fair. Don't know enough about the cars yet to really help.
Oil cooler? Poor filter fitting? Crank case breather?

anonymous-user

Original Poster:

54 months

Sunday 27th January 2013
quotequote all
Thanks guys. It's half full. Going for a 250 mile drive and have spare oil with me so ill probably check half way. Ill update this afternoon and check a few of the mentioned things this evening. Not got a lot of time on my hands the next few weeks so think its best to get it in the shop depending on this afternoons consumption.


frayz

2,629 posts

159 months

Sunday 27th January 2013
quotequote all
Is the car running more boost than stock?
Check the underside, for obvious gasket leaks, also check your air box.
If she's breathing heavily then you will find oil in your air box and quite a bit in the intercooler.

rb5er

11,657 posts

172 months

Sunday 27th January 2013
quotequote all
Pretty sure theres always a certain amount that gets blown into the intercooler anyway.

anonymous-user

Original Poster:

54 months

Sunday 27th January 2013
quotequote all
Well I've just covered 270 miles and its either used none or not very much.

I'm even more confused now. I put 800 ml in last week and 200 ml in yesterday. What the heck is going on. Taking a litre between services can't be right.

Maybe ill just keep a v close eye on it. I'm pretty confused now.

SCEL1SE

307 posts

190 months

Sunday 27th January 2013
quotequote all
Keep an eye on it, and get the undertray off, check out the engine. Highly possible that you may have a leak, and depending on positioning, type of use, can determine how much it may loose!
So get a torch in there and explore!

madwrx

91 posts

206 months

Sunday 27th January 2013
quotequote all
5w30 is a touch thin as oil goes even on a standard car mate-these are low drag mpg oils ,at higher oil temps it may not give enough protection to engine and turbo if you like to push the car.
i,ve never owned an impreza that did,nt use a fair bit of oil-always seems strange myself the way that for 500 miles it,ll drink nothing at all and then need half a litre all at once.
i tend to think that a lot of oil gets thrown about during cornering that ends up in the breathers and air intake and tmic,also yhe thinner oils are probably more prone to this anyway.
my present car is having the rear crankshaft oil seal sorted atm-even with that leaking oil consumption still was,nt that bad although the rear of the gbox/sump was coated in oil deposits.
with tuned cars i always vent the breathers to a catchcan- this has reduced oil consumption markedly(??)and excludes oil mist from the air inlet.

zombies

145 posts

155 months

Monday 28th January 2013
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Well, mine was a tad over on oil when I bought it in Sept, I thought i'll wait and let it burn, still waiting!
Am gonna change it but.....

Am sure they all different.

Maybe oil choice
As a starter I'd try run o the mill 10-40w semi, any will do
give this a couple of thou miles and see how it is

zombies

145 posts

155 months

Monday 28th January 2013
quotequote all
an get them pipes cleaned!

pikeyboy

2,349 posts

214 months

Monday 28th January 2013
quotequote all
zombies said:
Well, mine was a tad over on oil when I bought it in Sept, I thought i'll wait and let it burn, still waiting!
Am gonna change it but.....

Am sure they all different.

Maybe oil choice
As a starter I'd try run o the mill 10-40w semi, any will do
give this a couple of thou miles and see how it is
If the specified oil grade is 5w30 and assuming its more likely to burn oil when its warm, I think a 5w40 or thicker would be a wiser choice. This gives you the advantage of easier cranking and better proection when cold as the oil will be pumped quicker when cold due to the lower viscosity (5). The thicker oil when warm (40) will make it less likely to burn oil when warm.

zombies

145 posts

155 months

Monday 28th January 2013
quotequote all
yeah, that's what I said

pikeyboy

2,349 posts

214 months

Monday 28th January 2013
quotequote all
zombies said:
yeah, that's what I said
Not quite since you suggested a 10w40. 10 being the grade when cold which is obviously thicker than a 5. Since we are only interested in viscosity change when warm to reduce oil consumption I see no benefit in changing this. Intact long term using a thicker oil when cold will increase engine wear as its harder and slower to pump a thicker oil.

zombies

145 posts

155 months

Monday 28th January 2013
quotequote all
He has said he did a 270 mile trip without using any, probably warm by then

My post 10-40 or whatever wasn't meant to be taken literally, 5-40 10-40 whatever, just try a different oil

it wont make that much difference 5-40 or 10 40

people look into this too much, you're not running the space shuttle

Edited by zombies on Monday 28th January 13:18

zombies

145 posts

155 months

Monday 28th January 2013
quotequote all
boy said:
....... Intact long term using a thicker oil when cold will increase engine wear as its harder and slower to pump a thicker oil.
Not if you change it often

pikeyboy

2,349 posts

214 months

Monday 28th January 2013
quotequote all
zombies said:
boy said:
....... Intact long term using a thicker oil when cold will increase engine wear as its harder and slower to pump a thicker oil.
Not if you change it often
Absolute rubbish. A large part of my job is tribology so I know a little about wear mechanisms.