Not true. While a established supplier would almost certainly have given samples for free, a company teetering on the edge of insolvency like FSNR is unlikely to give away "freebies".
Also, no major company would actually be concerned with the price of several gallons of Petrozene. They'd pay it if they thought the product MIGHT be worthwhile.
And for many types of testing, a couple of gallons is LOTS.
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