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Old 03-27-2012, 01:52 PM   #1
91011swrx
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Default New WRX Break-In Period

I read that you should keep it under 4000 rpms, not use the cruise control and mix up the driving for the first 1000 miles

Unfortunately, I read that after I had taken the car over 4000 rpms a few times and set the cruise to 65mph for 15 minutes or so.

I know I haven’t ruined my car but have I degraded it's performance in any way?
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Old 03-27-2012, 01:57 PM   #2
Chris-pee
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You should be fine, just keep the rpm's varied and don't romp on it. Should not have hurt it at all.
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Old 03-27-2012, 02:04 PM   #3
dcorn
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I drove my car 500 miles home from the dealer and used cruise control for most of it. I also got stuck in some traffic, so the 'revs were varied'. 8k miles later, its fine.
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Old 03-27-2012, 02:06 PM   #4
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Quote:
Originally Posted by 91011swrx View Post
I read that you should keep it under 4000 rpms, not use the cruise control and mix up the driving for the first 1000 miles

Unfortunately, I read that after I had taken the car over 4000 rpms a few times and set the cruise to 65mph for 15 minutes or so.

I know I havenít ruined my car but have I degraded it's performance in any way?
Not a big deal; just break it in properly for the rest of the 1,000 miles.
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Old 03-27-2012, 02:16 PM   #5
redline23
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First 75 miles for me were varied highway miles in a snowstorm. Before I broke 1000 last this weekend, I have certainly romped on it a few times, but only after it was warm and maybe only a very small pull in one gear. It's not like your car is magically broken in at 1001 miles and will crap itself if you give it boost at 999 miles.

My opinion is that the car is broken in 90% of the way in the first 200 miles. (made up statistics)

source: http://www.mototuneusa.com/break_in_secrets.htm
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Old 03-27-2012, 02:17 PM   #6
redline23
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First 75 miles for me were varied highway miles in a snowstorm. Before I broke 1000 last this weekend, I have certainly romped on it a few times, but only after it was warm and maybe only a very small pull in one gear. It's not like your car is magically broken in at 1001 miles and will crap itself if you give it boost at 999 miles.

My opinion is that the car is broken in 90% of the way in the first 200 miles. (made up statistics)

source: http://www.mototuneusa.com/break_in_secrets.htm
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Old 03-27-2012, 02:19 PM   #7
10splaya22
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Your car will be perfectly fine
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Old 03-27-2012, 02:28 PM   #8
JRCrutc
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I would say that you are fine. The 1000 mile break in seems to be more of a safety concern from the manufacturer than anything else anymore (especially on Japanese cars). They want to make sure that if there is a failure that you are prepared for it and driving carefully/listening to your car.

The tolerances in new engines are extremely tight with modern day machining methods, and gross failures are not too common any more. That being said, if there is a defect, it should show up right away (hence the first 1000 miles).

There are all kinds of theories on this, and several hundred posts with different opinions on the topic, but it all comes down to the simple physics of the engine and having a little fun during the break in period shouldn't hurt anything.
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Old 03-27-2012, 02:45 PM   #9
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I think Subaru's procedure is a bit silly as Subaru takes motors throughout the rev range when the car is first built. Subaru has had this 1,000 mile, 4K rpm break-in for as long as I can remember. My wife's 07 Outback has it listed in the owners manual as did her 1998 Legacy GT wagon manual. Both cars were purchased used and neither have/had engine problems. There's nothing magical going on inside the motor after the motor's first warm up and break-in run which is done way in advance of you getting the car. I don't understand why Subaru sticks with this break-in procedure.

As taken from this Popular Mechanics article http://www.popularmechanics.com/cars...k-in-a-new-car

"Piston rings donít rely on their spring tension to seal against the cylinder bores. Instead, combustion gases work their way between the rings and the piston and force the rings outward. During the first few minutes of engine operation, itís important that the throttle be opened pretty far at lower rpms to provide this high pressure. Otherwise, the rings wonít burnish the cylinder walls properly, and the engine will have high volumes of blow-byówhich means excessive oil consumption and shortened engine life. If youíve ever seen the car jockeys who drive new cars off the end of the production line into the storage lot, or the transporter drivers zipping up and down the car-hauler ramps, youíll realize that this all-important step has been performed for you many times. If youíre installing a new engine, simply give it a few seconds of wide-open throttle in a high gear. For the first thousand miles, avoid constant speeds and throttle settings. If you commute in normal stop-and-go traffic, youíll be fine. I advise against cruise-controlled sojourns across Nebraska."
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Old 03-27-2012, 02:52 PM   #10
crofty
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I like the theory of "setting the rings" I always gently build up to high throttle and more than 4,000 rpm on my new cars. Never had oil consumption issues. 12,000 on my stg 2 sti and it doesn't use a drop of oil. I don't think my technique helped that but it clearly didn't harm it.
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Old 03-27-2012, 03:11 PM   #11
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Quote:
Originally Posted by crofty View Post
I like the theory of "setting the rings" I always gently build up to high throttle and more than 4,000 rpm on my new cars. Never had oil consumption issues. 12,000 on my stg 2 sti and it doesn't use a drop of oil. I don't think my technique helped that but it clearly didn't harm it.
I can anecdotally confirm this, but be warned that ymmv. The day I picked up my WRX with an EJ20, I drove it gently for about 15 minutes, then did several WOT runs through second and to about 5K rpm in third followed by engine braking. I then drove it gently for another 10 minutes or so before going back to the dealer and finalizing the payment details. That car never burned a drop of oil in the 110k miles I had her, even using the dreaded Mobil 1 5-30.
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Old 03-27-2012, 03:49 PM   #12
91011swrx
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Thanks for your input. I figured there shouldn't be problem, but when it’s your new sports car hearing it from someone else is like your mother telling you things will be alright as a child.

I’m sure the engine diagnostics would show rpm, mph, min, max and duration. I wonder if a problem did occur in the first 1000 miles if Subaru might put up some grief and say it wasn't broke in properly. However, the dealer never mentioned the break in period before driving off the lot. It was in the manual but I believe on the last page along with the fact that you need to use 91 octane fuel, which wasn't mentioned at the dealer either. They did tell me to read the manual though.

Thanks again.
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Old 04-08-2012, 08:07 PM   #13
JACKRBT
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I'm picking up my new WRX this week and there is one salesperson at the dealer that has told me at least twice now that "these engines are broken-in at the factory so you don't need to do anything." I'm more apt to follow the 1K mile procedure outlined in the manual than believe some dufus at the dealer but I've always wondered about this. Seems this is the same recommendation that has been printed in every owners manual for every car for the past 30+ years. Either it is totally obsolete but is kept as a CYA for the manufacturer or it has some merit. I find it hard to believe that SOA would condone one of their reps openly advocating something that directly contradicts their printed documentation. I'd like to not "worry" about driving it "just so" for the first month but I guess it's probably the more conservative thing to do.
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Old 04-08-2012, 08:13 PM   #14
2011WRXMT
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I have 21k on mine and i used cruise from the dealer hit 4k a few times in the 1st 1500 and all is good here.
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Old 04-08-2012, 09:38 PM   #15
DSRX2005
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For my break-in (now I've had to break-in couple of times...) I usually don't take it above 4 1/2K, never really go WOT, but when I do, I shift very early. At like 3-4K RPM's.
I also would like to know some other's break in advice, so keep talking!
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Old 04-14-2013, 08:50 PM   #16
BubbaFNSmith
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I've got mine at 500 miles right now. I bought it with like 5 on it. I'm sure whoever put those 5 miles on it weren't light on the pedal.

I've been slowing increasing the throttle and higher RPM's I think i've taken mine to 5.5k...

I honestly have never "broken in" an engine before and I've owned plenty of new cars with 0 problems. Just take it easy. If you feel the need to get on it, who cares!
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