Flathead V8 Socks
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Description: Based in the town of Norphlet in Union County, Arkansas, Macmillan Oil Company began producing their Ring Free line of motor oils in 1923. The company was highly successful in promoting their products through sponsorships of motorsports ranging from flat track motorcycle racing and powerboats, to air racing and grand prix events, leveraging them to make their 'race proven' claims. Ring Free products continued to be popular throughout the '60s and '70s, but in as more high-tech formulas from new companies arrived in the '80s, Macmillan Oil Company's fortunes began to wane, and by the end of the decade, they had ceased operations.
