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Geno's also sells kits. Mail the sample to the lab & they email the results. Also- I take oil samples to the local Cat dealer & they have an in house lab.
I was using Oil Analyzers (Amsoil affiliate), but just got my 12/21 sample results today (1/14). That, plus the cost has gone up to ~$18. When I use up my prepaid kits, I'm switching to CTC, who is highly recommended by others and reasonably priced.
I though CTC and Amsoil split. Used to be able to get CTC kits from Amsoil. Not for several years now. I started with CTC and still use them. They just added all their data (your data) online with query tools and all. Real cool company with labs all over the US.
One poster says CTC is ~$10; another says ~$18. Guess I'll have to call CTC and see if their prices really have risen that much; if so, I'll check some of the other suggested providers.