Is it a usual thing for the Subaru "Boxer" engine to burn oil?

Asked by Oct 28, 2015 at 08:47 AM about the 2009 Subaru Forester 2.5 XT

Question type: Maintenance & Repair

I have a 2009 Subaru Forrester that uses a Quart of oil a week! Cannot afford to rebuild engine. Any suggestions .Using 5w20 synthetic oil because previous owner did. Should I go to conventional oil.

5 Answers

76,625

You don't say how many miles are on the car or how many miles you drive in a week but that is a lot. Try using 5w-30 or 10w-40 oil. Oil use can be from high miles or oil leaks from the head gaskets. Be glad you don't own a new Subaru that uses 0-20 oil! You could also try adding Lucas oil additive and see if that helps.

1 of 1 people found this helpful.
76,625

Synthetic oil costs a lot more than regular oil but is not used any faster or slower either. You can save money by going to regular oil. You don't say how often the oil is changed but going to every 3,000 miles might help some.

6,845

I've recently switched to Rotella T6 5w-40 and add it to my amazon subscription (16.63 after 15% off for 5 items) and get one every two months. That's 3 bucks cheaper than walmart. I am not as familiar with the oil burning as FoR but would like to hear more from JRH on your mileage / has the car sat long / long intervals of oil changes (stuck rings?). While your forester is running, take the oil cap off and slap your hand on the filler hole to seal it and feel the pulses as described in one post here: http://www.subaruforester.org/vbulletin/f88/how-much-blow-too- much-111031/ One poster also mentions Mobil 1 being the issue that they got away from. Which brand are you running? Keep researching!! :)

1 of 1 people found this helpful.
76,625

Some oils are much more volatile than others. Oils with low volatility will reduce oil consumption. I don't use or sell Amsoil but this report is informative. http://www.amsoil.com/lit/g3115.pdf

5,540

This is simpler than alluded to above: Subarus, having boxer motors that sit in oil at rest...and more importantly have horizontal strokes, consume oil, especially upon warmup...than "vertical" motors. The industry-wide move to 5w/20 oil did Subaru no favors...and then they shot themselves in the foot with 0w20 synth!! You will undoubtedly reduce oil consumption significantly by using 10w dino oils...or even good old 20w50 in hot climates. My favorite is he old euro-spec 15w40, but it's harder to find. Just stay away from skinny synths. Subarus' longevity isn't particularly predicated upon clean nor fussy-spec oil. It's more impoirtant to just keep the level reasonably full to reduce the chance of overheating, and thus increasing risk of head gasket failures or picking up rod bearing noises. If you know you're running 0w or 5w (or any synth) you can add a thickener (or just 20w/50) until the next oil change. Interestingly oil consumption may actually also diminish with use as the engine self-polishes over time. I've seen 175k mi 2.5i that neither consume nor even dirty up oil after 3k miles. Just keep the cooling system full along the way, and cover that oil stick's dot wet with thick stuff...and if it's cold out warm up for a miinute and don't rev above 3k until isothermal.

1 of 1 people found this helpful.

Your Answer

Forester

Looking for a Used Forester in your area?

CarGurus has 33,701 nationwide Forester listings starting at $1,295.

ZIP:

Subaru Forester Experts

  • #1
    Nick Eidemiller
    Reputation
    3,820
  • #2
    walth
    Reputation
    3,200
  • #3
    lifeson34
    Reputation
    2,690
View All

Related Models For Sale

Used Subaru Outback
401 Great Deals out of 33,654 listings starting at $1,500
Used Honda CR-V
787 Great Deals out of 53,796 listings starting at $1,750
Used Toyota RAV4
807 Great Deals out of 50,519 listings starting at $1,500
Used Subaru Impreza
187 Great Deals out of 18,963 listings starting at $2,200
Used Subaru Legacy
219 Great Deals out of 14,209 listings starting at $2,449
Used Toyota 4Runner
281 Great Deals out of 21,455 listings starting at $1,700
Used Ford Escape
1,042 Great Deals out of 86,072 listings starting at $1,188
Used Toyota Highlander
438 Great Deals out of 26,772 listings starting at $1,800
Used Subaru Impreza WRX
47 Great Deals out of 1,277 listings starting at $3,365
Used Honda Accord
1,063 Great Deals out of 60,931 listings starting at $999
Used Nissan Rogue
624 Great Deals out of 70,463 listings starting at $2,895
Used Toyota Tacoma
586 Great Deals out of 42,368 listings starting at $1,995

Used Cars For Sale

2018 Subaru Forester For Sale
22,842 listings starting at $19,791
2017 Subaru Forester For Sale
32 Great Deals out of 1,934 listings starting at $19,499
2016 Subaru Forester For Sale
63 Great Deals out of 1,133 listings starting at $15,078
2015 Subaru Forester For Sale
114 Great Deals out of 2,681 listings starting at $11,995
2014 Subaru Forester For Sale
60 Great Deals out of 1,193 listings starting at $8,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.