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Old 06-05-2019, 12:40 PM   #1
TarzanoftheApes
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Default Can My Stock '06 WRX Engine Last 150,000 Miles?

Details:

-Purchased the car 6 months ago to be used as a daily and an autocross car.
-Currently at 106,000 miles.
-Car is autocrossed hard about twice a month.
-Car is totally stock except for a K&N air filter and front sway bar. Original engine.
-I change the oil every 2-3 thousand miles with AMSoil.

I am an anxious person by nature, and believe I have done a reasonable job keeping up with maintenance and preventative measures so far. A fellow WRX driver and autocrosser has helped me with getting to know the car's tendencies and possible failure modes. I always try to keep the revs above 3000 when autocrossing or accelerating hard.

I wanted to post this question to gauge what the general consensus is on how long this engine can potentially last.

Is it typical to see these engines last more than 150,000 miles when taken care of? Besides ringland failure, what other high cost failure modes could I potentially have? Thanks in advance.
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Last edited by TarzanoftheApes; 06-05-2019 at 01:54 PM.
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Old 06-06-2019, 06:32 PM   #2
Asm123
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Default Depends

Modern engines when taken care of with high quality ie synthetic, oil and regular maintenance can last well over 150000 miles. That said auto cross isn't usually considered "taking care" of a car. If you race at all you need to be prepared for the upkeep of the car and that includes replacing brake pads, tires, fluids, rotors other breakable parts as well as engines much sooner than you normally would. You have to be prepared to pay if you want to play.
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Old 06-07-2019, 09:17 AM   #3
shadowsports
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'17 STI LMT '08 LGT
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Subaru didn't require use of synthetic oils in the turbo motors until 2010.

I have 158k on my LGT. Dyno oil since birth. Your car can easily last 200K or more if like ASM123 said, you "take care of it".

You bought the car used. You have no idea what happened to it before you got it. Will it last, maybe, probably, but no one knows for sure.

AutoCrossing it... that increases the possibility of failure greatly.

Asking if your car will make it 45k more miles is like asking us if you will live to be 100 yrs old. We don't know.

If this is a Daily Driver or primary vehicle for you, I suggest saving $$$ and having a back up plan in the event of failure, so you won't be stranded.
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Old 08-06-2019, 11:34 PM   #4
stck4evr
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I'm also interested to see how long these WRX engines last for fellow Subaru owners on this forum.

Who has the most miles on the original engine?

I have 135K miles now on my 2009 WRX.
All I had to do so far is new Mass Air Flow Sensor - it was dirty tripping check engine light on.
Well, turbo failed - early in life on warranty - before car hit 10K miles.
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Old 08-07-2019, 02:51 AM   #5
ironpants
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I'm approaching 220,000 miles on my stock 2006 WRX engine. I decided to clean out my positive crankcase ventilation system (pipes, hoses & valve) ~20k miles ago and there was a significant build up of sludge to remove. Occasional hard driving and one instance of overheating due to coolant spraying out from a hairline crack in my upper radiator hose. Still going strong.
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Old 08-07-2019, 02:53 AM   #6
scriptkiddy
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Quote:
I'm also interested to see how long these WRX engines last for fellow Subaru owners on this forum.

Who has the most miles on the original engine?
Check out this thread: https://forums.nasioc.com/forums/sho....php?t=2406760

Bought my '02 wagon about a year ago. Previous owner claimed he took good care of it, but I found all of the normal wear and tear stuff had yet to be replaced. Been slowly fixing/upgrading over time. Currently ~160k on the original motor and running fairly well. It makes the noises I expect an older motor to make, but nothing terrible.

Now that I think about it, I should check the timing belt.
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Old 08-07-2019, 02:55 AM   #7
redrexmeister
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04 WRX wagonette
SRR

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It's hard or impossible to predict future, esp. if you're not the first owner, have no knowledge how the car was used prior to your ownership. Nevertheless, there are few things you could do.

If you're really anxious look up a good company on BITOG to do oil analysis, take several datapoints. If your car was abused you likely will see trends.

Buy a boroscope, an inexpensive one that you connect to a smartphone will do. When you change spark plugs, use this tool to take images of cylinder liners.

Do a compression test and /or leakdown test at the same time.

No way to be clairvoyant but you have quite a few tool at your disposition to assess the current state of your engine.

Enjoy the car, do appropriate maintenance and have a rainy day fund to address any issues in case something goes wrong.

Hedge your bets!

Last edited by redrexmeister; 08-07-2019 at 03:08 AM.
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Old 08-07-2019, 03:07 AM   #8
redrexmeister
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Quote:
Originally Posted by scriptkiddy View Post
Check out this thread: [url]https://forums.nasioc.com/forums/

Bought my '02 wagon about a year ago...

Now that I think about it, I should check the timing belt.
EJ205 is a totally different beast...With good maintenance they can do $200K+
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Old 08-07-2019, 03:23 AM   #9
scriptkiddy
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Quote:
EJ205 is a totally different beast...With good maintenance they can do $200K+
Yeah, I keep hearing that the EJ205 is one of the more reliable motors.
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Old 08-07-2019, 10:28 AM   #10
jimwalston
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I had 235K on my 03 WRX when I sold it. Still runs great!
Mobil One
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Old 08-07-2019, 06:19 PM   #11
bluesubie
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Quote:
Originally Posted by TarzanoftheApes View Post
-I change the oil every 2-3 thousand miles with AMSoil.

Which one? There are about 30 different choices.
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Old 08-10-2019, 02:39 AM   #12
Arctic Penguin
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my 06 wrx just turned 200k miles and its been tuned at 23-24psi on the stock turbo, which i just had to finally change out......and it still runs like a top.....i drive it like i stole it every time i drive it.
the best oil ive found is the 0w40 Castrol thats made in Belgium or Germany.......i go 6500-7k mile oci and use the WIX 7712
its gonna get a big 16g here soon....
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Old 08-10-2019, 01:33 PM   #13
some dude
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2006 WRX here. Original engine, transmission, turbo,and clutch.
I'm original owner, car has 306k.
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Old 08-12-2019, 10:03 PM   #14
redrexmeister
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SRR

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Quote:
Originally Posted by some dude View Post
2006 WRX here. Original engine, transmission, turbo,and clutch.
I'm original owner, car has 306k.
306k on Michigan roads is quite an accomplishment, not to mention climate.

Any major repairs you had to do? What kind of driving are you doing?
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Old 08-13-2019, 12:44 PM   #15
some dude
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Car was stock tune for first 290k miles. Stage 2 now because exhaust rusted out.

Original head gaskets.

I replaced oil pickup with a KillerB just to be safe around 150k.

I drove a fair amount of highway miles, like 75,000 miles of cruising at 65 or so. Super easy driving.

I changed oil on time always, and check the oil level periodically.

I've always drove easy, accelerating light and coasting to stops. And always tried to keep clutch wear to a minimum, with no stoplight/ hill clutch bs.
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Old 08-14-2019, 04:27 AM   #16
dustinb621
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I have 181,xxx on my '13 WRX. Bone stock with nothing but an Accessport to monitor internals. I bought mine used with 130k and alittle service history on the car. I seen the diff fluid had been changed, some what regular oil changes per factory manual specifications, timing belt done at 80,000, and other nic naks. I replaced the entire clutch assembly at 145k, a coolant flush at 160k, timing belt and spark plugs at 170k and regular oil changes every 4500 miles with Motul 8100 X-clean 5w-40
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Old 08-18-2019, 08:42 AM   #17
alexholl
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Obsidian Black Pearl

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192K on my 05 XT from the northeast. original motor, clutch and trans. only one head was taken off at 140K for a burnt exhaust valve.
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Old 08-19-2019, 01:05 PM   #18
Wayne Suhrbier
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OBP

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160k on the wife's 06 wrx. mix of city and highway
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Old 08-22-2019, 05:48 AM   #19
keithatpda
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2009 WRX
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Default 200,000 miles

Quote:
Originally Posted by TarzanoftheApes View Post
Details:

-Purchased the car 6 months ago to be used as a daily and an autocross car.
-Currently at 106,000 miles.
-Car is autocrossed hard about twice a month.
-Car is totally stock except for a K&N air filter and front sway bar. Original engine.
-I change the oil every 2-3 thousand miles with AMSoil.

I am an anxious person by nature, and believe I have done a reasonable job keeping up with maintenance and preventative measures so far. A fellow WRX driver and autocrosser has helped me with getting to know the car's tendencies and possible failure modes. I always try to keep the revs above 3000 when autocrossing or accelerating hard.

I wanted to post this question to gauge what the general consensus is on how long this engine can potentially last.

Is it typical to see these engines last more than 150,000 miles when taken care of? Besides ringland failure, what other high cost failure modes could I potentially have? Thanks in advance.
My experience, hundreds of events, track days, hillclimbs, dirt track autocross, syn oil always and often.
Tune from Eric at Torque Performance, finally gave up last month, warn exhaust valves and oil rings worn out, everything else still perfect.
Rebuilding with sti short block.
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Old 08-22-2019, 09:56 AM   #20
chopshopdwrx
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As long as your tune is good and you don't beat it to death, it should last. I'm at 190k now. Regular autocross probably isn't a good idea if your looking for longevity
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Old Yesterday, 09:32 AM   #21
StarkWRX
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World Rally Blue

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2006 WRX currently with 160k miles
Stage 2 at 15psi last 60k

ZERO oil consumption until about 140k miles which is about the same time the radiator cracked and the engine overheated for a couple minutes. That’s why I’m guessing I melted the rings.

Now I’m experiencing slight head gasket failure but it’s not awful. Just need to top up with coolant and oil every week.
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Old Yesterday, 10:15 AM   #22
liltoua
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Not sure if the motor was replaced when I bought my 05 STI, but my engine is at 260,000 miles on a Cobb Stage 2 OTS map with no issues at the moment. Knock on wood.
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