VINTON, Iowa (July 19) – Tony Olson’s dream season continued Sunday night at Benton County Speedway.In just 34 Karl Chevrolet Northern SportMod starts in 2015, Olson earned his 18th feature win, his seventh on the Vinton quarter-mile.Kurt Hogan took the lead from Jake Salisbury following a lap one caution while Olson worked through the pack from a fifth row start. Racing the top side, Olson made his way into the top five after three laps and then found himself challenging Hogan for the lead a handful of laps later.Olson swept around Hogan at the line at the midway point of the 16-lapper, then survived a pair of late stoppages to drive to victory ahead of Danny Dvorak and Matt Petrzelka.Damon Murty also raced to his seventh win of the season in the Ron-Da-Voo Lounge & Deli IMCA Stock Car 18-lapper.Murty started in row five, but a trio of cautions over the first four laps left Murty sitting third for the final restart. He chased Shane Ebaugh back to the green as the lead pair swapped the top spot over the next four laps.Murty took the lead for good on the eighth circuit to drive to victory ahead of Norman Chesmore and Curtis Roster.Mike Burbridge took advantage of his outside front row start in the 20-lap Cassill Motors IMCA Modified feature.Burbridge built a big early lead while Zach Less battled Dennis Betzer for second. Burbridge held a near straightaway advantage by the time Less worked into the runner-up spot on lap eight.Less quickly reeled in Burbridge and made his bid for the lead just past the midway point, taking took over on the 11th circuit. Less led the remainder of the caution-free event to score his first win of the season on his way to the top of the point standings. Burbridge ran second ahead of Troy Cordes.The lead was not the place to be throughout much of the IMCA Hobby Stock headliner.A flat tire briefly sidelined Nathan Ballard midway through the event and a miscue in turn four with two laps to go ended the run for Zach Swanson, who took over after Ballard lost the point.Justin Wacha inherited the lead for a green, white, checker finish allowing him to drive to his second win of the year ahead of Leah Wroten and a hard-charging Ballard.