- STP 500
The STP® brand partnered with Martinsville (VA) Speedway to present the STP® 500 on March 26th, 2018. The 2018 STP 500 was the sixth NASCAR Cup Series race sponsored by the brand at Martinsville Speedway. The 2018 race winner, Clint Bowyer, was also the sixth different winner in as many races.
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