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Old 07-31-2005, 06:52 PM   #1
TacticalNuke
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Default 1K vs. 3K first oil change

The manual says 3K, most people say 1K. So, which one is best and why?

I'm at about 960 miles and will definitely pass 1K by the end of tomorrow. I could probably change by 1200 or so, but I may wait for 3K if that's the recommended. I want to be sure to totally break the engine in.
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Old 07-31-2005, 07:01 PM   #2
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I do my new motors like this
300 miles, first oil change. Get that carbon'd up break in oil out of there asap.
1000-1500 miles, 2nd oil change. Oil isnt nearly as carbon'd up as the first 300 was, but there is still a good amount of blowby until the rings are 100% seated.
3000-3500 3rd oil change, then start the regular intervals for changes.
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Old 07-31-2005, 07:02 PM   #3
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Quote:
Originally Posted by TacticalNuke
The manual says 3K, most people say 1K. So, which one is best and why?

I'm at about 960 miles and will definitely pass 1K by the end of tomorrow. I could probably change by 1200 or so, but I may wait for 3K if that's the recommended. I want to be sure to totally break the engine in.

1. Breaking the motor in will happen whether or not you change the oil at 1k or 3k.
2. You want as clean of oil as humanly possible dunring the break in.
3. most of the "break in" wear happens in the first 100 miles of the motor.
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Old 07-31-2005, 07:06 PM   #4
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So, basically when should I change the oil? ASAP? And should I switch to full-synth or run a blend until the next change? If I blend would I wait 3K or would I do a shorter run?
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Old 07-31-2005, 07:20 PM   #5
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Old 07-31-2005, 07:29 PM   #6
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Quote:
Originally Posted by Unabomber
I knew I could count on you for a FAQ link.

I've read that entire thread, and in it you said to one person who asked the same question do what you want. However, if I had my way I'd never change the oil and wait for the engine to seize, but I'd like to know what I should do.

There are just too many different philosophies.

Sigh, I think I may just shoot for 1500 or so. Even the manual never gave a clear answer but said 3.75K, not anything about break-in.
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Old 07-31-2005, 08:49 PM   #7
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My philosophy is Subaru knew what they were doing when they said 3000. I see no good reason to do it earlier.
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Old 07-31-2005, 08:58 PM   #8
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Quote:
Originally Posted by Mike Wevrick
My philosophy is Subaru knew what they were doing when they said 3000. I see no good reason to do it earlier.
Thank you, sir, for the response. This is my feeling, but honestly I know too little to go by my own feelings on this issue. It seems there are many different philosophies and this is one that I believe.

The only trouble is I really wish Subaru would've address this in the manual. IE, they would've specifically said 1000 miles break-in, change the oil with synth. at 3K, something along those lines. It would make me feel much more at ease. Perhaps I missed it, but I've read most of the manual, if not all parts that pertain to the issue at hand.

I'll have to wait and see how SOA responds to my e-mail about the oil change interval.
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Old 07-31-2005, 09:06 PM   #9
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Please post what SOE has to say but it makes sense to flush out all those particles and shavings asap so I will probably do it at 1K.
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Old 07-31-2005, 09:18 PM   #10
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Quote:
Originally Posted by eSToI Loco
Please post what SOE has to say but it makes sense to flush out all those particles and shavings asap so I will probably do it at 1K.
I'll update the thread with the SOA response, though depending on who is on the other end of the internet it may not be all that for which I am hoping.
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Old 08-01-2005, 12:20 AM   #11
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I believe SOA would recomend/print that you need to change your oil before the first 3000 miles if you needed to. But who knows. All I can say is I changed my first oil change in my 2002 WRX at 3k miles, and I currently have 109k miles and the engine is fine as far as I know.
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Old 08-01-2005, 08:28 AM   #12
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I went to ~2,200 miles, changed to Mobil 1 and an orm filter and never looked back. Now at 92,000+ miles running strong and never a problem. I chose NOT to drain the factory fill too early because factory oil is loaded with moly and ? to assist/protect during breakin period. UOA on factory oil conferms addition stuff in oil either by addition of stuff or by special assembly lub which doses the oil. Too soon is not the best. ed
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Old 08-01-2005, 10:27 AM   #13
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Since I've been driving Subaru's (8 years) I've always gone by the manual. However, after seeing a few used oil analysis' on the break-in oil where it sheared down to a 20 weight, it's probably not a bad idea to switch at 1,000.

If you switch to synthetic before 10,000 miles, do not run it for more than 3,750 miles. The metals from the wear-in process will just shear the oil down.

Posts just like yours are asked once a week.

-Dennis
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Old 08-01-2005, 03:09 PM   #14
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Thank you for all the excellent information fellas. I'll be sure to run synth only up to 3K miles each change until 10K (at which point I'll run 'til 3K anyway but won't be scared about being too anal).
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Old 08-01-2005, 03:48 PM   #15
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Not sure there is much point in synthetic if you are only going to 3k with it. But Subaru does not recommend going past the normal service intervals even with synthetic. My driving is fairly moderate (lots of highway cruising mixed with some city) so I am doing 5k intervals with a good dino oil (Castrol GTX)
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Old 08-01-2005, 08:50 PM   #16
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Quote:
Originally Posted by Mike Wevrick
Not sure there is much point in synthetic if you are only going to 3k with it. But Subaru does not recommend going past the normal service intervals even with synthetic. My driving is fairly moderate (lots of highway cruising mixed with some city) so I am doing 5k intervals with a good dino oil (Castrol GTX)
I drive my car like I stole it 5 minutes ago. I may stretch to 5K if I'm lazy, but try to keep it in the 3-4K range. The oil is supposedly 15K, and that might work on a BMW driven like my old man drives his, but not on a Subaru driven by a 19-year-old whose never had a fast car before.

Thanks for the information.
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Old 08-02-2005, 12:38 PM   #17
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Quote:
Originally Posted by TacticalNuke
I drive my car like I stole it 5 minutes ago. I may stretch to 5K if I'm lazy, but try to keep it in the 3-4K range. The oil is supposedly 15K, and that might work on a BMW driven like my old man drives his, but not on a Subaru driven by a 19-year-old whose never had a fast car before.
....you'll never know that unless you have the oil sent out for testing at each change. ....and I suspect you would be suprised at the results.
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Old 08-02-2005, 05:02 PM   #18
TacticalNuke
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Thank you for visiting the Subaru web site. We appreciate you taking the time to contact us.

Regarding the use of synthetic oil and oil changes. We would recommend that you use regular oil as outlined in the Owner's Manual and follow the recommended oil change schedule listed in the Warranty and Maintenance Booklet until the car has approximately 10,000 miles to allow the engine to seat properly. After that you may use the synthetic oil however we would continue to recommend that you follow the same maintenance schedule laid out in the booklet.

I hope this is of assistance to you. Should you have any further questions of a technical nature you may wish to direct them to your local dealership who have trained technicians readily available. You may also feel free to contact us here at 1-800-SUBARU3.
Regards,
Wendy Clough
Subaru of America, Inc.
Customer/Dealer Services Department
-----------------------------------------------------------
YOUR ORIGINAL MAIL:

I recently purchased a new MY 2005 WRX. The vehicle currently has 960 miles on it. I have heard many differing thoughts on oil changes. I'm wondering what I do at this point. Some things I've heard:

Run semi-synth (blend) from 1500-3000 and run full synth at 3K on.

Continue to run factory 'til 3K, then synth from then on.

Run full synth at 1K, then change at 3K and each 3K thereafter.

Please let me know which is the best philosophy. Thank you for your time.

Sincerely,
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Old 08-03-2005, 09:33 AM   #19
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Driving it "like you stole it" isn't necessarily the hardest thing on oil. Stop and go driving in high heat and trips of less than 5 miles (especially in winter) are much harder.

-Dennis
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Old 08-03-2005, 03:43 PM   #20
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Well, I think that Subaru answered our questions about the oil issue. I have no problem waiting until 10,000 miles before I switch to synthetic. At the rate that I drive my car, I doubt that I am going to reach 7500 miles in the first year.
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Old 08-03-2005, 04:00 PM   #21
TacticalNuke
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Quote:
Originally Posted by bluesubie
Driving it "like you stole it" isn't necessarily the hardest thing on oil. Stop and go driving in high heat and trips of less than 5 miles (especially in winter) are much harder.

-Dennis
Thank you for the information.

I actually did steal my Subaru.
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Old 08-09-2005, 08:11 AM   #22
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Quote:
Originally Posted by TacticalNuke
Regarding the use of synthetic oil and oil changes. We would recommend that you use regular oil as outlined in the Owner's Manual and follow the recommended oil change schedule listed in the Warranty and Maintenance Booklet until the car has approximately 10,000 miles to allow the engine to seat properly. After that you may use the synthetic oil however we would continue to recommend that you follow the same maintenance schedule laid out in the booklet.
This is exactly what I'm doing with my '05 STi (now with a bit over 10,000 miles on it). I dropped the factory oil & filter @ 2,500 miles (replaced with Mobil Drive Clean 5w-30 "conventional" oil. Ran that out to 5,000 miles and replaced it with Motorcraft Semi-Synthetic 5w-30. Ran that out to 7,500 and then replaced it with Mobil Clean 7500 semi-synthetic 10w-30. Ran that out to 10,000 miles and finally made the switch over to a "full" synthetic...German Castrol ("GC") Syntex 0w-30. I intend to run it for 4,000-5,000 miles and have it analyzed by Blackstone Labs to see how it's holding up. I'm hoping to be able to run an even 5,000 miles on the GC, shouldn't be a problem based on the used-oil analysis' I've seen on GC.
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