The amount of time that 500 litres of oil will last in winter in the UK will depend on a number of factors, including: The size of your home The efficiency of your boiler The insulation of your home The climate in your area Your heating habits According to the Energy Saving Trust, a typical home in the UK with an oil boiler will use around 1,500 litres of oil per year. This means that 500 litres of oil would last for around 3 months in winter. However, this is just an average figure, and your actual usage may be higher or lower. If you have a larger home, you will use more oil. If your boiler is not efficient, you will also use more oil. If your home is well-insulated, you will use less oil. And if you have a habit of leaving your heating on all day, you will use more oil. In general, you can expect 500 litres of oil to last for around 3 months in winter in the UK. However, it is important to factor in the other factors mentioned above to get a more accurate estimate.