here is one place i found doing a search. looks like sample kit is free and the cost is $20 for a regular analysis. we send samples in to kendall for a few of our customers boats. they test for free because we use kendall oil in them. i will check with kendall to see how much they charge.
as far as an oil pressure gauge,it would not show low oil pressure due to worn bearings.not a noticable amount anyway. shawn
http://www.blackstone-labs.com/
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