* heads off to dip the tank to see how accurate the app is compared to the calculated volume in a partially filled horizontal cylinder!*

And if anyone is interested its a 225 x 120 (2500L) tank with a current oil depth of 13cm – which seems to be a volume of 149L.

Take away 2cm for the height of the outlet and the useable oil volume is about 116L

….. my app says there should be 119L left.

Happy with that and knowing exactly how much oil is used every day makes figuring out when to buy much easier.  If I didn’t know my actual daily usage I’d be pooping myself right now.

Just ordered 1000 L at 72 ppl, including VAT and delivery. South Shropshire. We checked one of the online price match things but they were no cheaper than the local firm we normally use. Plus we have restricted access and need a smaller tanker, the online place would have charged more for this but the locals do it as a matter of course because they know loads of places round here are tight to get in and out of. Over 10ppl cheaper than our last fill up in the autumn.

Edit to say, we have a Watchman fitted but I don’t find it that useful. I prefer to eyeball it. It was down to 2 bars and flashing 10 days ago, but an eyeball shows we still have just over 300L left in a 1300L tank.  Enough for a good few week probably.  We get a discount for orders of 1000L or more, so we alway have to judge that there’s enough space in the tank to accommodate that much before delivery.

Anyone know how I can get a guide to the volume at different dip heights for the tank we’ve got? It’s one of these:

https://www.kingspan.com/gb/en/products/storage-tanks/oil-storage-tanks/ecosafe-slimline-bunded-oil-tank/?v=1000

I use this:
https://www.omnicalculator.com/construction/tank-volume

But my tank is not bunded, so you’ll need to contact Kingspan and get the actual internal dimensions.

If I enter 135 x 45 x 158 I get a total volume of 960L which isn’t going to be too far off.

Quoted 53p per litre ex-vat yesterday.

I’ve still got about 400L and hardly using any now – 1.7L/day if anything at all recently as the heating is off and the PV does most of not all of the hot water now.

I’d like to buy 1000L which would probably see us though the next 12 months but I’d actually like to turn the heating up a little next winter, so I may need 1500L.

I’ll keep an eye on the price but I’m not sure it will drop much more.

I just bought 500L via Boiler Juice for 56.7p/L plus VAT. They were doing a £15 off voucher which negates their service fee. I’ll see how it goes price wise but will probably get another 500L before Winter. Heating is off now so we’ll probably use less than 250L between now and October.

We’re just flashing on the second bar, so planning to fill up (1000l) by the end of the month while the prices seem low.

Just ordered 1000l for £614. Happy with that. We’re only using it for hot water now unless there’s a particularly cold spell.

We have been on 2 bars for a month now.

Heatings set at 10degrees now – has been for 2 weeks.

I’ll worry about filling up when I get to one bar.

Hopefully be on solar for hot water before too long as well which should help.