Murilo Rua will never run out of gas.

"Ninja," a former EliteXC middleweight champion and Pride veteran, announced his retirement following a knockout loss to Paulo Filho last September, and he has found good ways to make money on his post-fighting life.

Mauricio "Shogun" Rua revealed, during a conference call to promote UFC Fight Night 26, that his brother now owns a gas station in Curitiba, Brazil, and "Ninja" spoke to MMAFighting.com about it.

"We have great costumers here," Rua told MMAFighting.com about the gas station that he has owned since December. "It wasn’t easy at first. I’m still learning, taking step by step."

Rua revealed that he started the business when his father-in-law decided to buy the gas station, but didn’t have enough time to run the business.

"A guy offered to sell it to my father-in-law and he wanted to buy it, but didn’t want to take care of it, so he bought it and gave it to me, and I already paid him back," he said.

Asked if he makes more money with gasoline if compared to his MMA purses, he said he "can have a good life now, and that’s important."

Focused on opening new franchises of Universidade da Luta gym in Brazil, "Ninja" didn’t follow his brother's training for next Saturday’s UFC Fight Night 26 main event, when he meets Chael Sonnen.

He’s confident the former light-heavyweight champion will be victorious, and predicts a devastating ending.

"My brother will knock him out on the first round," Rua said. "Sonnen will try to take him down and my brother will finish him early. Sonnen’s chance (to win) is basically score points on the ground and pound, but my brother is also dangerous off his back. It’s definitely not a good match-up for Sonnen. Sonnen isn’t that good on the ground. He has a good wrestling, but we can’t compare him to my brother on striking and ground abilities. My brother is the favorite, he has more weapons to win."