Joey Logano won the Cup Series race at Nashville Superspeedway on Sunday despite running extremely low on fuel. While speaking with Dale Earnhardt Jr. on the Dale Jr. Download podcast, Logano talked about how he saved fuel to earn his first victory of the season. “It’s no different than if you wanted to save fuel going down the road,” Logano said. “The first thing you do is eliminate the brake pedal. The brake pedal is the No. 1 fuel mileage killer. There’s a few things that went into allowing us to run as long as we did. For one, I think there’s 40-something laps of caution within that 110-la…