Even though consumption on LPG is slightly higher than gasoline, the total operating costs of an LPG hybrid Elentra are significantly less than a Prius. In Australia, LPG is $3.26/U.S. gallon less than gasoline. That means an average driver could operate the LPG hybrid Elantra on less than $10 a week. Hyundai has field tested about 100 LPG hybrid Elantras and is reportedly close to finishing validation of the system. The mild hybrid Elantra uses a 15kW motor, LG Chem lithium ion battery and 1.6L engine. The LPG hybrid is thought to get about 47mpg (U.S.) compared to 53mpg for the Prius. Gasoline currently runs $5.80 a gallon in Australia and an LPG mild hybrid could be much less expensive to operate. Hyundai is also developing both plug-in and non-plug variants of a strong hybrids and could begin limited production of a fuel cell vehicle by 2012.