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Old 05-24-2011, 10:35 AM   #26
CatfaceType-R
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@ msm, u payed of it in the cost of the vehicle, nothing is free
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Old 05-24-2011, 10:37 AM   #27
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The problem with doing 7,500 mile oil changes isn't the oil its the filter. you can go 7,500 and be fine, but id change the filter half way though. While oil has come a long way filters really haven't. Ive worked for an auto parts company for 4 years and worked at a quick lube for 3 years, Ive dealt with just about every cars oil lol.
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Old 05-24-2011, 10:45 AM   #28
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Quote:
Originally Posted by issueslude99 View Post
The problem with doing 7,500 mile oil changes isn't the oil its the filter. you can go 7,500 and be fine, but id change the filter half way though. While oil has come a long way filters really haven't. Ive worked for an auto parts company for 4 years and worked at a quick lube for 3 years, Ive dealt with just about every cars oil lol.
And just how do you recommend pulling that feat off? I'd love to see someone change the filter without losing the oil in there.

Subaru's spec states that the OEM filter (the blue one) will work just fine at the interval listed. You're on your own if you go with any other brand.

Last edited by jonklein611; 05-24-2011 at 11:14 AM.
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Old 05-24-2011, 10:45 AM   #29
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Quote:
Originally Posted by issueslude99 View Post
The problem with doing 7,500 mile oil changes isn't the oil its the filter. you can go 7,500 and be fine, but id change the filter half way though. While oil has come a long way filters really haven't. Ive worked for an auto parts company for 4 years and worked at a quick lube for 3 years, Ive dealt with just about every cars oil lol.
You worked at Quick Lube and that makes you an oil expert?
I wouldn't let Quick Lube check the level of my washer fluid...

The correct response to when you change your oil has already been given.
It depends on how you drive your car, severe conditions or not.
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Old 05-24-2011, 10:50 AM   #30
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This isn't sarcastic - why is it that people automatically assume that stop-and-go is automatically "extreme" driving conditions? I mean, yes, I understand that definitely puts more load/stress on the car/engine, but is that really something that would deteriorate the oil + filter that much faster?

In theory doesn't oil only deteriorate faster when the engine is "hotter"? Also, with regards to filters not lasting as long, isn't that dependent on the environment more than anything else? The filter's job is to keep crap out of the oil going into the engine, right? So what if not that much is getting in the oil to begin with?

Again, this is not sarcastic; I'm actually asking.
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Old 05-24-2011, 10:51 AM   #31
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Quote:
You worked at Quick Lube and that makes you an oil expert?
I wouldn't let Quick Lube check the level of my washer fluid...

Didn't say it made me an expert, it wasn't a jiffy lube or anything like that, it was NTW back in the day when sears owned it. I do have a good bit of experience tho as I said I work for a auto parts company and I've done a good bit of R&D on oil filters.
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Old 05-24-2011, 11:18 AM   #32
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Quote:
Originally Posted by nti_hazard88 View Post
This isn't sarcastic - why is it that people automatically assume that stop-and-go is automatically "extreme" driving conditions?
It's not what people assume. It's what Subaru tells you is considered extreme driving.

**Examples of Severe Driving Conditions:
a. Repeated short distance driving.
b. [not for oil changes]
c. Driving in dusty conditions.
d. Driving in extremely cold weather.
e. [not for oil changes]
f. [not for oil changes]
g. Towing a trailer.
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Old 05-24-2011, 12:49 PM   #33
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Quote:
Originally Posted by nti_hazard88 View Post
Isn't the color of the oil alone a really bad way to judge the oil's "wear" ?
correct
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Old 05-24-2011, 01:04 PM   #34
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Unless you beat the piss out of your car, you guys that are changing your synthetic oil every 3k miles are just throwing money away.
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Old 05-24-2011, 01:11 PM   #35
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Originally Posted by FaastLegacy View Post
Unless you beat the piss out of your car, you guys that are changing your synthetic oil every 3k miles are just throwing money away.
This. 5k + intervals for me.
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Old 05-24-2011, 01:40 PM   #36
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Quote:
Originally Posted by nti_hazard88 View Post
In theory doesn't oil only deteriorate faster when the engine is "hotter"?
In theory, and in practice too I guess, a car standing has significantly poorer cooling capability than a car that's moving. Natural convection (or forced convection by the fans when they turn on) has significantly lower heat transfer capability than the type of force convection the car gets when it's going 40 mph down the street. So a moving car is able to cool your coolant significantly better than a non-moving car, resulting in a lower coolant temperature, if the engine in both cases are generating the same amount of heat. But obviously, a moving car generates more heat than a non-moving car. So, exactly which is worse for the car? Who knows. But I'm guessing if you're just cruising down the street a moderate RPM, the cooling advantage is not yet all eaten up by the increase in heat generation by the engine. If you're going down your favorite track full throttle, on the other hand, I'm sure the heat generated by the engine is now even or surpassing the cooling advantage.
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Old 05-24-2011, 08:01 PM   #37
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People who just mindlessly assume 7k is too high based on nothing are just throwing money away. Spend the $20 and get a UOA done and see if you actually need more than twice as many oil changes as Subaru is recommending.
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Old 05-24-2011, 09:42 PM   #38
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Originally Posted by mikerulzu View Post
People who just mindlessly assume 7k is too high based on nothing are just throwing money away. Spend the $20 and get a UOA done and see if you actually need more than twice as many oil changes as Subaru is recommending.
i opened this thread to post exactly this.

bravo.

people arbitrarily saying anything about an oil change interval in this day and age is ridiculous, yet it happens every day on forums like this.
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Old 05-24-2011, 10:51 PM   #39
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Quote:
Originally Posted by FaastLegacy View Post
Unless you beat the piss out of your car, you guys that are changing your synthetic oil every 3k miles are just throwing money away.
yep.....just plain
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Old 05-25-2011, 12:05 AM   #40
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Quote:
Originally Posted by Sideways View Post
Running Rotella T6 and I'm sticking with my 3k oil changes.
this, no more than 4000 for me though. most of my driving is highway with the cruise control on or really heavy stop and go city driving.
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Old 05-25-2011, 12:05 AM   #41
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Yup, I'm running Mobil 1 synth - I still do it every 6,000 km. Sure I could extend it but given the bad dusty conditions and rough driving (and bad stop and go traffic), I just like the extra peace of mind.
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Old 05-25-2011, 12:11 AM   #42
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Quote:
Originally Posted by jonklein611 View Post
And just how do you recommend pulling that feat off? I'd love to see someone change the filter without losing the oil in there.

Subaru's spec states that the OEM filter (the blue one) will work just fine at the interval listed. You're on your own if you go with any other brand.
easy.
1.unscrew the filter
2.loose half a quart of old oil.
3.install new filter.
4.top off with new oil.
5. ???
6. profit.
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Old 05-25-2011, 07:35 AM   #43
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Quote:
Originally Posted by spinnaker226 View Post
easy.
1.unscrew the filter
2.loose half a quart of old oil.
3.install new filter.
4.top off with new oil.
5. ???
6. profit.
Mine loses quite a bit more oil than that...

Have you seen proof of a filter failing due to it being run for 7,000 miles?
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Old 05-25-2011, 05:09 PM   #44
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I changed the oil in my 2003 WRX at 7500 mile intervals after the first change. I sold her with 137K miles on the clock and never had an issue. In fact, the 3750 required change (to keep my warranty) on my 2008 STI was but one small reason I traded it in. Glad to see Subaru came to their senses.
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Old 05-25-2011, 06:25 PM   #45
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I am going to go with what Subaru says. I get my oil changes for free, from Subaru, so if it blows up, it will be under warranty.
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Old 05-25-2011, 06:44 PM   #46
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I am going to go with what Subaru says. I get my oil changes for free, from Subaru, so if it blows up, it will be under warranty.
What about after the warranty? If you plan to trade or sell, then I suppose that's okay.
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Old 05-25-2011, 08:59 PM   #47
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Quote:
Originally Posted by jonklein611 View Post
Mine loses quite a bit more oil than that...

Have you seen proof of a filter failing due to it being run for 7,000 miles?
i change them twice between oil changes.
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Old 05-25-2011, 09:29 PM   #48
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I guess I lot of you are not used to using synthetic oil... you change your oil at 3500 with regular oil and synthetic? Extreme driving conditions? Look, just because it's a turbo car, it doesn't make it that extreme... I'm new to Subaru and geez you guys are so paranoid!

5K miles and call it a day...

I did 7500 on my BMW when they recommend 15k miles
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Old 05-25-2011, 09:31 PM   #49
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Bottom line is, you need to change your oil.
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Old 05-25-2011, 10:34 PM   #50
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Quote:
Originally Posted by usfsfire42 View Post
Bottom line is, you need to change your oil.
how profound.

lol

UOA and/or factory recommendations. what is so hard about that?

i'll say it again (but nobody will listen) - arbitrary oil change intervals make ZEROOO sense.
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