1964 Castrol The Masterpiece in Oils - In the Winner's Circle Vintage Ad

This original magazine ad is untrimmed from its 8.5 x 11" master page and measures @ 6 x 8" in overall size.  The ad features the popular Castrol Motor Oil brand and was published in 1964 showcasing a winning racecar driving in front of the Castrol banner.  The photo has been cropped to just focus on the ad portion.