Forester using oil

Donn Taljaard

Asked by Dec 26, 2015 at 01:33 AM about the 2007 Subaru Forester 2.5XS

Question type: Maintenance & Repair

Forester 2.5 XS 2007, big end bearing kicked out due to lack of oil,
damaged crank etc... Engine largely overhauled, new pistons, rings, crank,
bearings.....Original question, why i had no oil as there was no leak and i
was not blowing smoke, and now after the overhaul, I have the same
problem. I am replacing oil at the rate of 1lt per 10 days! And before it
happened no oil light, engine light or warning, and the oil was EMPTY??

What could be the reason of excessive oil consumption, with leaks and
rough pistons and rings ruled out? I have stumped a Subaru specialist who
fixed the car....

10 Answers

140,395 -- "While we believe the oil consumption of our vehicles to be within acceptable levels...." Out of context, granted but still shows their attitude.. Then: --Subaru considers a quart burned every 1,000 to 1,200 miles to be acceptable. -- What I know for a fact is my Toyota consumes ½ quart in 3500 miles between changes

3 out of 3 people think this is helpful.

Another Fosrester with Oil issues...

3 out of 3 people think this is helpful.
Bob Beaman

This makes me wonder if the crank bearing initially went out due to low oil level and lack of lubrication. Then when it was overhauled were the piston rings installed in the correct orientation, were the cylinder walls honed to the proper cross hatch pattern or is something else causing the issue? A wonder if pistons and bearings were even properly measured when the engine was reassembled. Were the cylinder heads disassembled and checked, were valve guide seals replaced? There are lots of places oil can go if engine is not built properly. Having a manufacturer specialist do the work is usually a good thing. The more problems I read about Subaru the less I like their cars. Please keep us posted as to what you find the resolution to this problem is as it may help someone else. Best of luck with it.

2 out of 2 people think this is helpful.

What I don't seem to be able to grasp Bob is if there is no smoke, no leaks, no puddles on driveway, some oil consumption I can understand that will show none these symptoms. But a quart in 1000 miles? Where is it going? If, as you say, and I agree, if the rings were not oriented correctly, 'staggered' where gaps are, honed properly and not grind grind grind with whetstone rotary honer then not put proper rings or even pistons, seems to me it would blow smoke...? I just don't get where all this oil is going

Bob Beaman

The catalytic converter will burn lots of the oil up and that probably accounts for minimal or no smoke. A quart in 1000 miles is not much oil per mile. I wonder if some of the #1 and #2 rings were installed upside down or if the cylinder is out of round or has excessive taper.

1 out of 1 people think this is helpful.

Try 10w instead of 0 or 5, and especially avoid synth unless 15w

Bob Beaman

To increase the viscosity at operating temperature the number after the "w" need to increase. A 5w30 and 10w30 are the same viscosity at operating temperature. A great read on oil is here at the link......

1 out of 1 people think this is helpful.

The 07 Subaru's do not use the 0-20 oil so oil consumption should not be an issue at all. I suspect the rebuild was not the best and maybe the cylinders were not honed properly or were worn and should have been bored out and over sized pistons installed. A quart in a thousand miles won't necessarily show any smoke burning especially with a catalytic converter.

2 out of 2 people think this is helpful.
Donn Taljaard

Thanks to all your info and input. I should've started off by saying this issue was there before the engine was done. Virtually replacing the capacity of the oil tank of 4.5lt every 2 months just doesn't seem right to me....(we here on the metric system, so not sure how many quarts that is. It consumes about 2lt of oil in 2000km).

1 out of 1 people think this is helpful.

Does sound like your rings are a mess. Maybe piston slap scored a cylinder too. Your consumption is/was too high...unless 0w.

Your Answer

Add photo

Related Questions

  • 2015 Forester Oil Consumption 11 answers

    Can anyone who posted on the oil consumtion issue with the 2015 Forester comment if the 2015 Foresters in question have manual transmissions? I curently own a 2014 Forester, manual, with oil consumpt...

    2015 Subaru Forester 2.5i


    Maintenance & Repair

  • SUBARU FORESTER vs ? 5 answers

    I'm in the market, unfortunately, for a new car, (my Sequoia nearly killed myself and daughter due to an unknown frame rot- whole different story)- anyway, he was advised Forester was the way to go,...

    Subaru Forester


    Maintenance & Repair

  • What long term damage can excessive oil consumption do to my 2015 Subaru Forester? 11 answers

    I am adding a quart of oil to my 2015 Subaru Forester every 1400 miles. This can't be good for the engine.

    2015 Subaru Forester 2.5i


    Maintenance & Repair

  • Has anybody had problems with excessive oil consumption in the 2015 Subaru Forester? 348 answers

    I would like to buy a 2015 Subaru Forester in the next few months, but I'm concerned about the excessive oil consumption I keep reading about in older models and I know a class action lawsuit was file...

    2015 Subaru Forester 2.5i


    Maintenance & Repair


Looking for a Used Forester in your area?

CarGurus has 19,314 nationwide Forester listings starting at $1,099.


Search Subaru Forester Questions

Subaru Forester Experts

#1 Nick Eidemiller
Nick Eidemiller
Reputation 3,210
#2 walth
Reputation 2,600
#3 lifeson34
Reputation 2,280
View All

Related Models For Sale

Used Subaru Outback"
432 Great Deals out of 29,667 listings starting at $1,295
Used Honda CR-V"
1,503 Great Deals out of 80,989 listings starting at $1,695
Used Toyota RAV4"
1,185 Great Deals out of 49,062 listings starting at $2,499
Used Subaru Impreza"
218 Great Deals out of 8,025 listings starting at $1,995
Used Subaru Legacy"
238 Great Deals out of 17,838 listings starting at $1,295
Used Subaru Impreza WRX"
40 Great Deals out of 1,324 listings starting at $2,500
Used Toyota 4Runner"
367 Great Deals out of 18,996 listings starting at $2,200
Used Ford Escape"
1,722 Great Deals out of 93,997 listings starting at $788
Used Toyota Highlander"
661 Great Deals out of 30,809 listings starting at $1,990
Used Jeep Grand Cherokee"
1,214 Great Deals out of 73,883 listings starting at $1,593
Used Toyota Tacoma"
617 Great Deals out of 30,502 listings starting at $2,850
Used Hyundai Santa Fe"
633 Great Deals out of 35,615 listings starting at $800

Used Cars For Sale

2017 Subaru Forester For Sale
3 Great Deals out of 10,157 listings starting at $20,970
2016 Subaru Forester For Sale
29 Great Deals out of 1,256 listings starting at $19,995
2015 Subaru Forester For Sale
76 Great Deals out of 1,723 listings starting at $14,950
2014 Subaru Forester For Sale
71 Great Deals out of 1,668 listings starting at $8,995
2013 Subaru Forester For Sale
20 Great Deals out of 434 listings starting at $11,991