Hot Shot's Secret, the Mt. Gilead, Ohio, manufacturer of diesel lubricants and additives, and the official fuel additive of the National Tractor Pullers Association (NTPA), will support a second season of the Hot Shot's Secret Challenge, a bonus series available to NTPA Grand National competitors.

With a payout of more than $30,000, the challenge is open to competitors in all 13 premier-level divisions across five participating events: Galot Motorsports Park Mule City 300 in Benson, North Carolina; Farley Nationals in Farley, Iowa; Budweiser Dairyland NTPA Super Nationals in Tomah, Wisconsin; North Iowa Nationals in Rockwell, Iowa; and the National Tractor Pulling Championships in Bowling Green, Ohio.

To be eligible for a payout to the top three-point earners in each division, a vehicle must be registered for the 2024 Grand National series and prominently bear the Hot Shot's Secret point fund decals on both sides, the company said.

For more information, visit hotshotsecret.com.