GAZ Group parent Russian Machines, claims CNG is the cheapest of commonly used motor fuels, with costs per 100km almost 60% lower than for liquefied petroleum gas (LPG). It also says CNG is more than twice as cheap as a diesel-powered car and 2.5 times lower price than a gasoline vehicle. Russian Machines CNG project executive director, Peter Zolotarev, spoke to Simon Warburton from the company's Yaroslavl plant about the possibility of using the gas in the country and some of the infrastructure challenges associated with it.