On Thu, 7 Jan 2010 15:02:13 +0000, Graeme wrote:

We bought 928l 17th December, to top up the tank, and have 1/5th of a
tank left. Tank holds 1200l, so that is 960l over 16 days, or 60l per
day, at 47.8p per litre, plus VAT. £30 per day. Cold up here, on Royal
Deeside!

Are you really sure? That seems like and awful lot of heat going
somewhere. Maybe you like it tropical though...

If my maths are right to burn that amount of oil in 16 days would
require a 25kW boiler to run flat out 24/7.

(16*24)*25 = 9600kW
Oil produces about 10kW/l so 9600/10 = 960l.

Sure you haven't got an oil leak?
Have you got the windows open?

Ah, looking at your figures 17th Dec to today is 21 days not 16.
960/21 = 45l/day. Still rather high though, the notional 24/7 boiler
drops to 19kW.

It's not been very warm here either, between 0 and -5C for the last
few weeks. I know the Highlands have been colder, -10 to -15C, but I
don't think it would increase oil consumption that much, would it?

--
Cheers
Dave.