Over time, depending on driving styles, kilometres covered and refuelling habits, there is an increased degradation of E10 fuel. Fuel with 10% ethanol absorbs more moisture than lower ethanol content fuels. As degradation occurs, the fuel can become corrosive to some metals, rubber hoses, seals, and fuel system components. It takes E10 petrol three months or longer than non-ethanol petrol (E0) to absorb enough moisture for phase separation to occur. By the time phase separation occurs in E10 petrol, the fuel is already stale, and engines can become difficult or impossible to start. The increase in lacquer formation contaminates fuel system components and can lead to poor running, misfires, and emission related fault codes. Ethanol fuel’s ability to absorb and retain water means it can become more corrosive. Over an extended period, this can cause damage to fuel system components. There are many things that effect the amount of moisture that can enter the fuel tank, such as weather conditions, the level of fuel is in the tank, how often it is filled up, mileage, and fuel cap seal can all influence the fuel.