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Old 02-04-2012, 03:57 PM   #1
ndtechie_rx8
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Default 1st Oil Change UOA

Sent in my 1st oil change. Used T6 with the blue OEM filter. After the change kept the T6 but used the 3.0 black OEM filter this time....thoughts?

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Old 02-05-2012, 12:50 AM   #2
furiouswrx
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Engine is still breaking in so it's hard to tell wear. Oil properties look like what they are supposed to be. Get a TBN next time to adjust oil change interval.
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Old 02-05-2012, 03:25 PM   #3
bluesubie
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Quote:
Originally Posted by furiouswrx
Engine is still breaking in so it's hard to tell wear. Oil properties look like what they are supposed to be. Get a TBN next time to adjust oil change interval.
^ Yes.

-Dennis
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Old 02-06-2012, 09:48 AM   #4
jonklein611
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Def get a TBN, always always always. It's worth the extra ten bucks.
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Old 02-06-2012, 09:54 AM   #5
ndtechie_rx8
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Quote:
Originally Posted by jonklein611
Def get a TBN, always always always. It's worth the extra ten bucks.
I'll do another 5k oci and get a tbn to see how much is left
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Old 02-07-2012, 11:05 AM   #6
gpshumway
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Quote:
Originally Posted by jonklein611 View Post
Def get a TBN, always always always. It's worth the extra ten bucks.
What's your rationale for this? I've done lots of TBNs over the years, and due to my driving style (lots of highway) they always come back at 3.5+, I now spend that money on more useful things. Just doing a UOA is a lot more than most owners do, the OCIs are generally conservative from a TBN perspective.

If I were trying to extend my OCIs I would get TBN for sure, but since I'm not, why waste the money? There are lots of other services you can pay for which might be more useful than TBN depending on your circumstances.

How about paying for a KV40 measurement so you know how the viscosity index of your used oil? How about a particle count so you can monitor the effectiveness of your filter, or get a better idea of wear?
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Old 02-07-2012, 06:18 PM   #7
bluesubie
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IMO, TBN's are great especially with Subaru recommending 7,500 mile intervals starting with the 2011's and for anyone going over 3,750 miles. I'm pretty sure there a a couple of TBN's on the Subaru oil where it was pretty much done at 4k miles. And the results you get in your application aren't necessarily the results that others would get in their uoa, with or without the TBN. On my 6k run on M1 0W-40, my TBN was 1.99 which surprised a lot of BITOGers because it's considered a good oil for 10-15k mile Euro applications.

Any $25-$50 uoa is for entertainment purposes only. If you want a real uoa, get a Dyson. KV @ 40 and tribologist audio comments are included. http://www.dysonanalysis.com/

-Dennis
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Old 02-07-2012, 11:37 PM   #8
gpshumway
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Quote:
Originally Posted by bluesubie View Post
IMO, TBN's are great especially with Subaru recommending 7,500 mile intervals starting with the 2011's and for anyone going over 3,750 miles. I'm pretty sure there a a couple of TBN's on the Subaru oil where it was pretty much done at 4k miles. And the results you get in your application aren't necessarily the results that others would get in their uoa, with or without the TBN. On my 6k run on M1 0W-40, my TBN was 1.99 which surprised a lot of BITOGers because it's considered a good oil for 10-15k mile Euro applications.

Any $25-$50 uoa is for entertainment purposes only. If you want a real uoa, get a Dyson. KV @ 40 and tribologist audio comments are included. http://www.dysonanalysis.com/

-Dennis
Oh, I hear you on determining if your OCI is appropriate, but once you've established that your OCI is conservative for your driving conditions I see no need to do TBN. Therefore I don't subscribe to the "always always do TBN" philosophy.
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Old 02-08-2012, 07:48 AM   #9
jonklein611
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Quote:
Originally Posted by gpshumway View Post
What's your rationale for this? I've done lots of TBNs over the years, and due to my driving style (lots of highway) they always come back at 3.5+, I now spend that money on more useful things. Just doing a UOA is a lot more than most owners do, the OCIs are generally conservative from a TBN perspective.

If I were trying to extend my OCIs I would get TBN for sure, but since I'm not, why waste the money? There are lots of other services you can pay for which might be more useful than TBN depending on your circumstances.

How about paying for a KV40 measurement so you know how the viscosity index of your used oil? How about a particle count so you can monitor the effectiveness of your filter, or get a better idea of wear?
Most people that post UOA's on here are either first timers, or trying to determine OCI. I agree that once you know a certain oil fits your driving style / engine / OCI that you can drop the TBN as the oil should perform the same.

I tailored my advice to what I've seen on the forum. 99% of the UOA's are guys running their first one or trying an extended OCI for the first time.
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Old 02-08-2012, 07:53 AM   #10
bluesubie
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Right, most people don't do TBN's but should do at least one or two if they plan in extending past 3,750 miles (or even 3k) or if they switch brands. I always get TBN, oxidation, and nitration since it's included with OAI testing anyway.

-Dennis
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