The South African Subaru Forester Forum.

Tech Chat => N/A Tech Chat => Topic started by: FootDoc on December 29, 2016, 12:28:17 PM

Title: Extreme Oil usage
Post by: FootDoc on December 29, 2016, 12:28:17 PM
Since I've had my SJ (MY13) my oil consumption has been, in my opinion, unusually high. As I'm new to the brand I figured its perhaps a forester thing, but after my last service I decide to take note of just how much I put it. It was last serviced in May this year and since then i have put in 2 pints in July, 1 pint in September, 1 in October and 2 pints a day before Christmas.

To me, this is not normal, what do the more qualified/experienced guys say??
Title: Re: Extreme Oil usage
Post by: LoopSoosStroop on December 29, 2016, 01:49:59 PM
So that's 3 litres in how many km's? 10k km? What km's are you on now? Has the car ever overheated?

My SG XT burnt 5 litres every 10k km before I rebuilt it. Definitely not normal but manageable.

The problem is that the only way to fix this is to rebore and fit oversize pistons and rings. Just standard size pistons and rings might help, but if extreme use is present then unlikely. Either way, that means the motor will be pulled and stripped almost entirely. 

There is a theory that when these motors overheat the rings bind up and the oil control rings pretty much stop working. My motor, besides having oval bores, had badly stuck oil rings. I'm not talking seized overheated, just HG's or radiator blowing maybe.
Title: Re: Extreme Oil usage
Post by: LoopSoosStroop on December 29, 2016, 01:56:32 PM
Oil consumption is not always the end of the world, but it becomes a pain to keep the oil clean and in good condition. When oil is burnt, you end up having less of it to go around, so the remaining oil works harder and is circulated more often. Obviously topping up helps, and shortening the oil change interval.

I ended up switching to Magnatech and changing the oil more regularly, and topping it up on a weekly basis, more often if driving harder. Spending big money on oil if it's all burnt away does not make sense.

For me, opening up a engine that is otherwise running well, just to fix this, is not a option. More chance of buggering something up when rebuilding. I rebuilt because I blew HG's. 

Title: Re: Extreme Oil usage
Post by: Stev0 on December 29, 2016, 09:53:04 PM
Scoobies love oil.

Title: Re: Extreme Oil usage
Post by: berndp on January 08, 2017, 07:17:14 AM
Just did a Ctn/Jhb/ECape trip of 4700km.
Used about 2.5 lt oil.
95% of this trip was open road (tar/gravel)

For me also too much consumption.
I'm running LM 20/40 semi synth, with some of that 10/40 MoS2 Leichtlauf oil added.

The engine does run quieter since using the LM semi oil. I think I'll stop using the 10/40 addition after now, and see if the oil consumption reduces.
Title: Re: Extreme Oil usage
Post by: Chingha on January 08, 2017, 10:39:34 AM
Does this have anything to do with it?

http://www.torquenews.com/1084/subaru-settles-oil-consumption-lawsuit
Title: Re: Extreme Oil usage
Post by: Stev0 on January 08, 2017, 03:49:33 PM
You guys should just all drive H6's

No oil use in 7000km :D
Title: Re: Extreme Oil usage
Post by: FootDoc on July 05, 2017, 06:09:42 PM
Thanks for all you opinions guys!! I really wish we could notification via email about replied to threads... or did I miss something in my settings?

Anyways, we're now July 2017, she was serviced again in March earlier this year, had to top up at least 1 pint in may, possibly 2, can't recall and another 2 pints today!  If other SJ drivers tell me they have the same issue, I'll accept that, but I'm trying to sell the foz and would hate to send her off with a problem for her new boss. I can't recall any other car I've had that needed so much oil without an active leak!

Also, which is the best oil to use?  I had rage misfortune of being 50km from home when I had to fill up and was left with no choice other than what engen had available, Petronas 15W40 - hope it's decent!!


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Title: Re: Extreme Oil usage
Post by: berndp on July 05, 2017, 10:08:58 PM
I think your car runs on Synthetic oil.
If you use LiquiMolly, expect higher consumption, don't ask me why.

I switched from Fuchs&WM Penn mineral oil to LM. Mistake....
Switched over to Shell Helix HX7 now (Semi), consumption is less than with LM.
I accept mine will use some oil (365k on the clock), but the LM was too much.
I know my valve stem seals are probably shot.

A pint/1000km is still considered normal, however for me it's also a bit high.

Regarding the notifications, there is a setting you can activate.
I just go on the site every few days, check for "Recent unread Topics" (Top RH under your name).
Works for me.
Title: Re: Extreme Oil usage
Post by: FootDoc on July 07, 2017, 09:51:27 AM
Thanks berndp,

i was advised to buy my own oil to keep at home do my own checks and top-ups. Will try helix and see if there's any difference.
Title: Re: Extreme Oil usage
Post by: jbh on July 11, 2017, 03:13:18 PM
You wont go wrong with HX7. Petrol consumption may be a tad higher but you wont use oil like with LM and Castrol GTX.
Title: Re: Extreme Oil usage
Post by: berndp on July 12, 2017, 04:40:33 PM
You wont go wrong with HX7. Petrol consumption may be a tad higher but you wont use oil like with LM and Castrol GTX.

Why higher fuel consumption?

Oil usage is slightly less than LM, but still quite high
Title: Re: Extreme Oil usage
Post by: jbh on July 13, 2017, 10:06:23 AM
The "Blue" Shell is a 10 W 40. The LM that most people use is a 5 W 30. The less the first number is, the lower the friction/ resistance is generally. But 100 people will have 100 different opinions.
If you search enough you may find a 10 W 50. If that does not stop your oil usage, fill with 25 W 60. That should fix all oil usage! Otherwise you must overhaul the engine.  :'(
Title: Re: Extreme Oil usage
Post by: LoopSoosStroop on July 13, 2017, 10:44:27 AM
I've also found higher oil consumption with 5W-40 synthetics compared to 10W-40 semi in the same car. The synthetics are really thin and get past the rings easier. 
Title: Re: Extreme Oil usage
Post by: sav on October 05, 2017, 02:52:16 PM
I've also found higher oil consumption with 5W-40 synthetics compared to 10W-40 semi in the same car. The synthetics are really thin and get past the rings easier.
At operating temp the 5w40 synth and 10w40 semi-synth have got the same viscosity.
Title: Re: Extreme Oil usage
Post by: LoopSoosStroop on October 07, 2017, 10:12:20 AM
I've also found higher oil consumption with 5W-40 synthetics compared to 10W-40 semi in the same car. The synthetics are really thin and get past the rings easier.
At operating temp the 5w40 synth and 10w40 semi-synth have got the same viscosity.

Agreed, that's how it works after all, I think it has more to do with the other properties of the oil.
Title: Re: Extreme Oil usage
Post by: Durbanboy on November 03, 2017, 12:06:54 AM
The "Blue" Shell is a 10 W 40. The LM that most people use is a 5 W 30. The less the first number is, the lower the friction/ resistance is generally. But 100 people will have 100 different opinions.
If you search enough you may find a 10 W 50. If that does not stop your oil usage, fill with 25 W 60. That should fix all oil usage! Otherwise you must overhaul the engine.  :'(

10w40 is a temperature range. I live in Durban and use 20w50. Thinner oil for colder climates.
Title: Re: Extreme Oil usage
Post by: sav on November 03, 2017, 06:41:32 AM
The less the first number is, the lower the friction/ resistance is generally. But 100 people will have 100 different opinions
99 out of 100 of those people will be right, the 100th being you.


(http://imagizer.imageshack.com/img922/8185/lIRiVO.png)
Title: Re: Extreme Oil usage
Post by: FozzieDriver on November 03, 2017, 07:06:32 AM
We should perhaps take a step backwards here.
We still do not know how much oil is being consumed by the OP. He could be using 1 litre of oil in 15000km which is WAY inside the window.
And oil is consumed in a variety of circumstances.
If it is being consumed at a rate outside of the manufactures "acceptable" use policy, then one take it further and insist that they fix it. Within those parameters one will have to do a couple of tests to determine where the oil is in fact going.
It can, as has been said before, go past the rings. On the turbo engines there can be excessive blow by that forces oil and vapour into the breathers and into the turbo inlet pipe. If this happens there is going to be further kak down the line as you WILL det your motor and break it.
It could be going past the seals in the turbo
Any turbo engine will consume oil, even the best oil on the market.
How much oil is the debatable part.
Personally the use of 1 litre every 10k even is nothing to worry about.
Title: Re: Extreme Oil usage
Post by: NeilF on November 03, 2017, 09:23:23 AM
This thread instilled some paranoia in me so I checked my oil (don't really do it often), and I was reminded of how confusing it can be to determine the oil level in these boxer motors. One should definitely let it stand a while after running before checking, I'd say about 20 min?

When I checked it 5 min after stopping it looked as if the level was just below halfway between the two marks. 30 min later it was just below the F mark.

Bit of a silly comment, but might prevent someone from overfilling. I won't recommend checking oil when refuelling at filling stations.
Title: Re: Extreme Oil usage
Post by: jbh on November 03, 2017, 01:16:06 PM
"99 out of 100 of those people will be right, the 100th being you."

Sav, I said that the lower the first number, The easier it flows. And I, as well as your Google search, say basically the same thing.

You can thus hold your sarcasm for yourself. It is unwarranted in an open forum. If you want to correct something do it in an acceptable manner, otherwise you will alienate even more members.
Title: Re: Extreme Oil usage
Post by: sav on November 03, 2017, 01:34:22 PM
"99 out of 100 of those people will be right, the 100th being you."

Sav, I said that the lower the first number, The easier it flows. And I, as well as your Google search, say basically the same thing.

You can thus hold your sarcasm for yourself. It is unwarranted in an open forum. If you want to correct something do it in an acceptable manner, otherwise you will alienate even more members.
Friction and flow are not the same things. There are so many "experts" stating things as fact when they clearly don't have a clue.

I'd rather alienate those and have the people who know what they're talking about hanging around, thank you.
Title: Re: Extreme Oil usage
Post by: 0012 on November 03, 2017, 02:06:19 PM
One should definitely let it stand a while after running before checking, I'd say about 20 min?

+1

My XT doesn't use oil between services (yet) wonder what I'm doing wrong?!   :o
Title: Re: Extreme Oil usage
Post by: FozzieDriver on November 03, 2017, 02:35:59 PM
One should definitely let it stand a while after running before checking, I'd say about 20 min?

+1

My XT doesn't use oil between services (yet) wonder what I'm doing wrong?!   :o
Have you modified it?
Title: Re: Extreme Oil usage
Post by: 0012 on November 03, 2017, 03:19:55 PM
Have you modified it?

pretty much stock except for a decat and a chett tune. 108k km
Title: Re: Extreme Oil usage
Post by: jbh on November 03, 2017, 03:28:08 PM
"I'd rather alienate those and have the people who know what they're talking about hanging around, thank you."

If that is the attitude of this forum's senior members    ...  Goodbye. You have one less member as of today.
Title: Re: Extreme Oil usage
Post by: LoopSoosStroop on November 03, 2017, 03:44:07 PM
"I'd rather alienate those and have the people who know what they're talking about hanging around, thank you."

If that is the attitude of this forum's senior members    ...  Goodbye. You have one less member as of today.

jbh, please don't go man. Sav just needs a weekend maybe?

Sav, gaan drink 'n bier en relax bietjie man!
Title: Re: Extreme Oil usage
Post by: sav on November 03, 2017, 03:50:32 PM
"I'd rather alienate those and have the people who know what they're talking about hanging around, thank you."

If that is the attitude of this forum's senior members    ...  Goodbye. You have one less member as of today.

jbh, please don't go man. Sav just needs a weekend maybe?

Sav, gaan drink 'n bier en relax bietjie man!
LOL! I'm 100% relaxed, thank you.

Oversensitive oke though,
(https://i.imgur.com/PijcGEU.gif)
Not so much I guess.
Title: Re: Extreme Oil usage
Post by: FozzieDriver on November 03, 2017, 04:25:55 PM
Have you modified it?

pretty much stock except for a decat and a chett tune. 108k km
Keep it that way.
Service every 10k and keep an eye on the radiator and you good


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Title: Re: Extreme Oil usage
Post by: FozzieDriver on November 03, 2017, 04:30:12 PM
Have you modified it?

pretty much stock except for a decat and a chett tune. 108k km
Keep it that way.
Service every 10k and keep an eye on the radiator and you good


Sent from my iPhone using Tapatalk