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Old 05-02-2017, 01:04 PM   #1
Norskie
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Default Common problems with FB engines?

We're considering a Crosstrek, an I'm curious if the new FB engines have shown themselves to reliable or whether they have common issues, like piston slap, ringland failure, oil burning, burnt valves etc?

I know the 2012-2013 have been known to be oil burners ... did Subaru do anything to update the new ones after the class action lawsuit ?
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Old 05-05-2017, 01:23 PM   #2
milkydaddy3
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Quote:
Originally Posted by Norskie View Post
We're considering a Crosstrek, an I'm curious if the new FB engines have shown themselves to reliable or whether they have common issues, like piston slap, ringland failure, oil burning, burnt valves etc?

I know the 2012-2013 have been known to be oil burners ... did Subaru do anything to update the new ones after the class action lawsuit ?
Good choice! I bought my 2016 Impreza Sport little over a year and a half ago, and not once had any issues. I would agree that some of the earlier models have had oil problems, and I haven't looked much into the 2017 models. Unless someone else has had issues, I'm not one to complain. Love it.
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Old 05-05-2017, 05:21 PM   #3
neg_matnik
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Some FBs have been burning oil as late as MY2015.
If your FB burns any more than 1/3 of a QT over 1200 miles then it needs fixing. Period.
A properly running FB barely burns any oil regardless of driving style; the manual may talk about up to a 1 QT per 1000-mile but Subaru's own TSB on the subject is very clear: again, no more than 1/3 QT per 1200 miles.
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Old 06-14-2017, 02:16 PM   #4
pRiMe DiReCtIvE
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My car is finally in the shop for a 2nd short block due to oil burning. I hope they resolved this issue. First time replacement was in 2015.
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Old 06-14-2017, 04:36 PM   #5
neg_matnik
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Originally Posted by pRiMe DiReCtIvE View Post
My car is finally in the shop for a 2nd short block due to oil burning. I hope they resolved this issue. First time replacement was in 2015.
Your 2nd short block? The first one they have you was very likely messed up from the factory like your original short block. That blows; I hope they really take care of you this time.
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Old 06-25-2017, 10:55 PM   #6
Kogie1983
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I have the 2014 forester, it was fine on the first year. Then i notice hard vibration on the engine, checked engine oil and it was way less then half of the dip stick level. This was before i heard and learn subaru engine oil consumption. Put oil and brought it to the dealership. Notice the problem after my second oil change from the dealership. I ask them if they fill my oil on the top level of the dip stick and they can't answer me. So they run some test like adjusted something on the ECU, they did some documentation of oil level to return it if the oil level reach down certain level. After 2-3k mile, my oil level didn't go down anymore. After that I've been more vigilant on my oil check and now I do my own oil change(for more constant monitoring). No burning of oil even after interstate driving for 2-3 days.
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Old 06-29-2017, 06:31 AM   #7
Norskie
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Quote:
Originally Posted by neg_matnik View Post
Some FBs have been burning oil as late as MY2015.
If your FB burns any more than 1/3 of a QT over 1200 miles then it needs fixing. Period.
A properly running FB barely burns any oil regardless of driving style; the manual may talk about up to a 1 QT per 1000-mile but Subaru's own TSB on the subject is very clear: again, no more than 1/3 QT per 1200 miles.
I've also heard (and have friends experience) Subaru's reluctance to do anything until it burns more than 1 qt/1k miles. Which TSB are you referring to?
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Old 06-29-2017, 02:09 PM   #8
neg_matnik
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Quote:
Originally Posted by Norskie View Post
I've also heard (and have friends experience) Subaru's reluctance to do anything until it burns more than 1 qt/1k miles. Which TSB are you referring to?
Subaru replaced the FB25 shortblock in my 2011 Forester; so, I have directly experienced the whole process.
First, it starts with the tech inspecting the engine for any external oil leaks (oil drain bolt, cylinder head covers, ....).
Then, the PCV is checked (a bad or sticking PCV causes oil consumption).
If it all checks out, the oil consumption test procedure starts; there's a specific form for that test; here is a direct quote:
Quote:
[...]
Consumption rate determined: ________________________ per ________________________ miles
[Oil Consumed every 1200 Miles = (OIL ADDED MILES DRIVEN) x 1200]
If there is oil consumption of 1/3 of a quart (10.7 oz in 1200 miles) or more observed and calculated as part of this test, proceed with the repairs listed in the applicable bulletin. If no applicable bulletin then proceed with repair as indicated by your diagnosis or contact SOA Techline** for assistance. If unsure about the dipstick indication of 1/3 of a quart, add 1/3 of a quart of oil, (allow at least 5 minutes) then re-check to see if the oil level is full or over-full. If the level is at or below the FULL Mark, perform the applicable repair. If the level is above the FULL Mark, no repair is necessary as the consumption rate during this period is less than 1/3 of a quart (10.7 oz). This rate of oil consumption is not considered unusual.
[...]
Link to the PDF: https://content.subarunet.com/snet/_...ption_test.pdf

Pic of the PDF:


The latest TSB, TSB 02-157-14R is out there as well. It should pop out in a Google search.
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Old 06-30-2017, 05:39 PM   #9
LusciousY
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The car likes to burn oil so just check it every 2000 miles to make sure it's not too low and have a liter with you to top off in case it is. Other than that, you should be good. I have almost 80k miles on my 13' Impreza and never had to take it to the shop for anything. I change the oil every 5k miles and just recently changed my brake pads all around at 75k. That's literally it.
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Old 08-10-2017, 10:41 AM   #10
JordanOfGilead
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Quote:
Originally Posted by LusciousY View Post
The car likes to burn oil so just check it every 2000 miles to make sure it's not too low and have a liter with you to top off in case it is. Other than that, you should be good. I have almost 80k miles on my 13' Impreza and never had to take it to the shop for anything. I change the oil every 5k miles and just recently changed my brake pads all around at 75k. That's literally it.
On the other side of that coin, my '16 impreza is burning through a quart every 2500-3000 miles. Taking it to the local dealer to set up for a consumption test later today.
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