Renfrow began 1998 running Dominic Dobson's #78 Dodge. In his first race at California, Renfrow qualified 4th. Renfrow then led his first career CTS laps at Pikes Peak, leading ten laps before fuel issues forced him out. He would also lead nine laps at Loudon, but the results were not there and Renfrow left the team. He drove the #61 IWX Chevy at Martinsville in his next start. There, he drove a solid race to 9th place. It was his first career CTS top 10. The run earned Renfrow a run in the #66 Ford for two races, and then the #84 Ford for the season finale. However, for those two teams, his best race was 26th at Vegas and neither ride resulted in a 1999 offer. Overall, he finished 30th in points.