I’m beginning to wonder if oil is just an inherently expensive way of heating your home… sadly we have no gas in my area
Going to check if my roof insulation can be improved – seems to be maybe 4” of fibreglass at present.
Oil is actually a very similar price in terms of running cost to mains gas at the moment. Improving your insulation will certainly help - when I increased mine from less than 4" to over 10" my oil usage reduced by about 8%.
Still staggered by both yours and your friend's usage though... this is mine. As I've said before, I know I'm a little frugal and a fan of the pullover, but our house definitely isn't cold and the difference is huge - my average consumption is less than two litres per day through the year to provide heating and hot water. 4 beds, 1500sq ft late 1960s ex council house. The 1340 litres delivered at the bottom was the first fill on the new installation