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

34,665

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 out of 1 people think this is helpful.
34,665

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.

5,625

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 out of 1 people think this is helpful.
34,665

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

2,810

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 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Forester

Looking for a Used Forester in your area?

CarGurus has 20,144 nationwide Forester listings starting at $1,290.

ZIP:

Search Subaru Forester Questions

Subaru Forester Experts

#1 Nick Eidemiller
Nick Eidemiller
Reputation 3,310
#2 walth
walth
Reputation 2,640
#3 lifeson34
lifeson34
Reputation 2,310
View All

Related Models For Sale

Used Subaru Outback
394 Great Deals out of 30,027 listings starting at $1,500
Used Toyota RAV4
1,088 Great Deals out of 54,457 listings starting at $1,999
Used Honda CR-V
1,259 Great Deals out of 73,997 listings starting at $1,650
Used Subaru Impreza
206 Great Deals out of 7,573 listings starting at $1,795
Used Subaru Legacy
239 Great Deals out of 16,922 listings starting at $1,200
Used Subaru Impreza WRX
45 Great Deals out of 1,253 listings starting at $1,999
Used Ford Escape
1,686 Great Deals out of 85,566 listings starting at $995
Used Toyota 4Runner
382 Great Deals out of 20,135 listings starting at $2,995
Used Toyota Highlander
649 Great Deals out of 27,478 listings starting at $2,988
Used Nissan Rogue
650 Great Deals out of 58,932 listings starting at $1,800
Used Toyota Tacoma
758 Great Deals out of 33,290 listings starting at $2,988
Used Subaru Impreza WRX STi
34 Great Deals out of 640 listings starting at $8,500

Used Cars For Sale

2017 Subaru Forester For Sale
11,351 listings starting at $20,544
2016 Subaru Forester For Sale
32 Great Deals out of 1,249 listings starting at $18,999
2015 Subaru Forester For Sale
90 Great Deals out of 1,769 listings starting at $13,988
2014 Subaru Forester For Sale
65 Great Deals out of 1,605 listings starting at $10,995
2013 Subaru Forester For Sale
19 Great Deals out of 408 listings starting at $10,433