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Old 09-22-2006, 02:01 AM   #1
bomber991
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Default So who changes their oil every 7500 miles or 7.5 months?

I've got a WRX and mine is basically stock. I've been changing the oil every 3,000 miles, but for the past few months, since April 21st to be exact, I've been mainly doing highway driving. I mean I've been getting around 27mpg. Anyways, I'm at 4,000 miles since the last oil change, and if I go by the schedule, it means I wouldn't have to change it till what, like the first or second week of December?

I've been checking the oil regularly and it isn't low or anything.

But dang, 7500 miles or 7.5 months seems like a long way to go on one oil change.

So, who here does the 7500 mile or 7.5 month change? And who doesn't, and if not, why?
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Old 09-22-2006, 07:17 AM   #2
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I do it at 5000 only because it's easier to remember. 7500 isn't that long, go for it. I'm at right about 6000 now due to a long trip. Read the Oil FAQ stickied at the top of this forum for more info. don't be skeeerd!
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Old 09-22-2006, 08:07 AM   #3
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It all depends on your driving conditions, what oil and viscosity you use, how comfortable you are about an oil shearing down to a 20 weight, and your location (Texas is hawt).

Who can really answer this question? Click here for oil analysis info.

-Dennis
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Old 09-22-2006, 08:14 AM   #4
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With synthetic oil I see no issues.... with dino that's a little bit too much...
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Old 09-22-2006, 08:45 AM   #5
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Quote:
Originally Posted by Rev1 View Post
With synthetic oil I see no issues.... with dino that's a little bit too much...
If it's an energy conserving 30 weight it probably can't take 7,500 miles, depending on driving habits.

An oil that meets European ACEA A3 requirements will be a good choice.

This was posted the other day:
www.whnet.com/4x4/oil.html

-Dennis
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Old 09-22-2006, 09:09 AM   #6
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Oil analysis FTW.

I now change my oil every 5000 in the blazer and every 4000 in the subaru. I guess autoX'ing every other weekend puts some extra stress on the oil.
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Old 09-22-2006, 12:25 PM   #7
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Quote:
Originally Posted by bluesubie View Post
If it's an energy conserving 30 weight it probably can't take 7,500 miles, depending on driving habits.

An oil that meets European ACEA A3 requirements will be a good choice.

This was posted the other day:
www.whnet.com/4x4/oil.html

-Dennis
When I had my Suby and I used to run M1 5-30, I did an oil analysis, and at a 3800 mile interval and 24,000 miles on my car, I had about 30-40% of oil life left... Daily driven, city driving... just an example
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Old 09-22-2006, 12:47 PM   #8
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Quote:
Originally Posted by Rev1 View Post
When I had my Suby and I used to run M1 5-30, I did an oil analysis, and at a 3800 mile interval and 24,000 miles on my car, I had about 30-40% of oil life left... Daily driven, city driving... just an example
Texas is hotter than Illinois. I don't even send in my UOA's until I have over 6k on the oil using German Castrol 0W30. That's why everyone should do a UOA.

-Dennis
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Old 09-23-2006, 04:27 PM   #9
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I have followed the maintenance guide to a T...after the intial
3K (2K for me...I went early , I have had Mobil 1 5/30 in there,
and changed it at 7500 intervals. Every other oil change I
have sent to Blackstone for UOI, and its come back with good
results. I don't stretch it any longer as its still in warranty (drive
train will expire in 2 week: 5 years and about 55K on her )

If using non-synthetic oil, I would be using a good quality brand (GTX, and others) and I would do that via UOA by starting at 5K, then 6250, then 7500 and see how that brand is holding up.

To me, Mobil 1 (or similar full synthetic) is the ticket for extended drain intervals.

- b
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Old 09-23-2006, 05:06 PM   #10
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I change my oil filter every 3,500 miles and the filter & oil every 7,000 miles... I have been useing AmsOil Synthetic 0W30 in winter and 5W30 in summer. Have over 144,000 miles on my '02 wrx with no problems to speek of. Synthetic oil works out just as affordable that way, and is good enough to get away with using it for the extended intervals with no problems.
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Old 09-24-2006, 11:38 AM   #11
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Quote:
Originally Posted by wrxdrvr View Post
I change my oil filter every 3,500 miles and the filter & oil every 7,000 miles...
this is what i do also. but 7500 is the minimum i run my oil. I use Royal purple 10-40. I ran it to 10K once with a filter change at 5K and Blackstone suggested this the MOST that oil be ran in my turbo charged car. 80K, vf34 setup and still running stong.
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Old 09-24-2006, 02:12 PM   #12
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I do 5- 6,000 mile oci with my Forester S. Blackstone said try 7000-7500 on my Mobil 1 5w30.
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Old 09-25-2006, 09:56 AM   #13
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I still do it every 3000-4000 miles. Mobil 1. It makes me feel better
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Old 09-25-2006, 11:41 AM   #14
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I do Mobile 1 5W-30 every 2,500-3,000. I have 16,000 miles on the car. 90% of my driving is to work, which is a short drive (2 miles), and I've read in a few places that driving short distances can be detrimantal. The engine never reaches full operating temperature to burn off any condensed moisture from the previous drive.
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Old 09-25-2006, 07:47 PM   #15
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My buddy's been gonig 7,500 on dino in his Outback XT. I'll post back in a few years if there's an oil related problem.
I change my M1 oil every 4K miles or so...but I think it's overkill.
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Old 09-27-2006, 12:36 PM   #16
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Are you guys who are doing UOA's paying the extra $5(?) to have the viscosity tested?
How much iron and copper are in the oil?


7.5k on dino oil!!! that poor turbo and engine.
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Old 09-27-2006, 02:20 PM   #17
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Quote:
Originally Posted by gtx510 View Post
Are you guys who are doing UOA's paying the extra $5(?) to have the viscosity tested?
How much iron and copper are in the oil?


7.5k on dino oil!!! that poor turbo and engine.
Viscosity is included with Blackstone. Only the TBN is an extra $10.

Stanley - Tell your OBXT friend there's no need to wait. Go to blackstone-labs.com and do a used oil analysis!

-Dennis
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Old 09-27-2006, 02:59 PM   #18
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Every 5k here but only because it's easier to remember.

That reminds me, i'm coming up on the 100k mark and i need to order another case of oil... Amsoil 5w30 synthetic FTW!
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Old 09-27-2006, 03:36 PM   #19
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i replace ever 3,000 miles religiously!!!
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Old 09-29-2006, 07:25 PM   #20
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I try for 5,000 mile OCI's on my STi with German Castrol Syntec 0W-30, but my last OCI ended up being 5,800 miles and this one will likely be something like 6,200 miles before I'll get a chance to change it out. All my UOA's are posted on BITOG if you care to read them.
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Old 09-30-2006, 01:46 PM   #21
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Did it around 5500 miles last 3 times after seeing the oil drain the last time i think im going to try for 6500 miles. Looked pretty clean to my eyes compared to the oil i put back in the motor.

Been useing royal purple 5w-30 for ove 15k miles.
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Old 10-01-2006, 09:11 PM   #22
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Redline 5w30 oem filter every 4K-5K miles. My driving style has lots of short trips and high rpms when warmed up. I burn about a quart every 1000 miles (varies on weather and driving style). Im sure this is due to all the short trips and high rpms in a turbo car. 02wrx wagon has 58,500 miles....purrs like a kitten Also 50whp/50wtq over stock.

I would like an oil analysis done...just never put the effort into it.
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Old 10-02-2006, 12:03 AM   #23
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Quote:
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I burn about a quart every 1000 miles (varies on weather and driving style). Im sure this is due to all the short trips and high rpms in a turbo car.

1 qt of redline every 1,000 miles? holy shiznit you must spend a lot on oil. Run some thicker oil my friend.
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Old 10-02-2006, 08:09 PM   #24
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No burnage here untill i started loosing my ring on the hot side of the motor i only get about 1000 miles monthly mostly city till i need to just drive.
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