Originally Posted by JDMLOL
Just out of curiosity, do you simply mail off a small vial of used oil?
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I used Blackstone Labs, they send you the sample bottles for free, you just mail it in along with a check or payment info. There are plenty of other places that do the same thing. Blackstone doesn't show all of what some of the company's do, I cant remember right off hand what they skipped. It was cheap though and I wanted a base to compare the RP to when the time comes.
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