 In mid-2005 Isuzu introduced the Elf Diesel Hybrid Truck on the Japanese Market.They claim that approximately 300 vehicles, mostly route buses are using Hinos HIMR (Hybrid Inverter Controlled Motor & Retarder) system.In 2007, high petroleum price means a hard sell for hybrid trucks and appears the first U.S. production hybrid truck (International DuraStar Hybrid).