I'm not a heavy user of oil. So my 1400 litre tank would last me around 4 years or more. I only use about 250 litres per year unless we have a particularly harsh winter.I'd rather put a pullover on than turn the heating up. I also have an electric shower, so don't use a lot of hot water from the boiler either. I used to use around double that amount of oil per year, but my usage halved after I had all my doors an windows replaced.Grumps said:How do you find the cost of running an oil fired boiler compared to getting a propane tank fitted to stay with gas. Is it something you have looked at.