Vehicle-specific testing on Kia, Hyundai and Toyota vehicles further provides proof of DynoValve's success. Testing concluded that, of four separate vehicle types -- the Toyota Highlander, Kia Rio, Hyundai Sonata and the Hyundai Elantra -- each found a sizable boost in fuel economy, resulting in 31.3 percent, 28.2 percent, 28.3 percent and 18.4 percent, respectively. And where did it bring us? Not filthy rich Yo!!!