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Discussion Starter · #1 ·
Here is a report on the oil from my S40 after 2800 miles. The signs all show very low wear on it, which surprised me.

I am still probably going to switch to synthetic and maintain a 3000-4000 mile oil change interval, but the moral of the story is that for average drivers, regular dino at 7500 mile intervals is probably fine.

 

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Discussion Starter · #3 ·
The reports come from Blackstone Labs. It's pretty cool, you request a kit from them for free, which is a bottle you can mail. when you change the oil, just fill the bottle with the sample and mail it.

it's $18.50 per oil sample, which is worth it to me (I rationalize it that when I change my oil myself and order a test, it STILL is cheaper than having the dealer do the oil change, plus I can make sure the filter cartridge gets changed every time too). The reports take about 2 weeks to get done.

here's a link to their web page.
http://www.blackstone-labs.com/
 
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