My car has a computerised display shows mpg. I have definitely decreased the amount of fuel I use - by in excess of 30%. I used to use a tank every 3 weeks, can go to well over a month now. This is in a combination of driving more economically - less heavy on the throttle and brakes, and not dashing off on errands as they come up, but planning non urgent trips in with other trips. So the goodies sitting for us in Screwfix will stay there till I go to the bank on Thursday, as I can go past to get to the bank. I also try to make time to walk or cycle to work. I noticed one of my neighbours, they're both in and out like yoyos all day, which got me thinking about this! Admittedly they do a school run, but they certainly could easily do the school run in the summer as the footpath shortcut is dry....other people do it. Quite often they come back from the school run and 10 minutes later they're off out again! Sometimes my car doesn't move for 3-4 days.
As for electricity, I've noted they've doubled the direct debit, which seems a little unfair given we've only had a 50% increase. I know they're planning ahead for the next increase so want yet more of our cash up front but personally I think that's unfair to hold so much of our cash in advance (£100 is still in hand after the most recent bill last week is paid) so rather than give a reading which is lower instead I've simply let them estimate this time and paid that, which appears to be based on 10% more than we used last year so perhaps an average of the past few years as we've been using less as we've gradually replaced eg LED bubs, more A rated appliances etc. I've rung them and got the direct debit down to what they told us it was going up to in an email in February (from £58 to £72 - instead they put a note on the bill later in February and took £94! Bit cheeky isn't it!)
As for oil, we replaced the solar immersion heater (hives off the electricity we generate on our solar to an immersion heater in the hot water tank) with a new one www.marlec.co.uk/product/solar-iboost/ that cuts in at a 100w generated over our other usage (previous one was 2Kw over), and as a result turned the oil off. We have a 2500litre oil tank so luckily filled up at 43p or so in the summer last year, I'm hoping by August we might see a figure approaching 60p which might entice me to top up before winter, otherwise I'm thinking I may gamble it'll come down for 2023 and fill up again then, I only fill up in a heatwave at the best of times anyway as that's when you get the best price - but obviously not everyone can do this or afford to do this - too small a tank or only able to afford small amounts at a time!
Food has definitely gone up - but we're growing lots of our own - rhubarb, lettuce and broad beans from the garden today. We have tomatoes, cherry tomatoes, cherries, apples, gooseberries, raspberries, blackcurrants and blackberries, lots of onions, potatoes, beetroot, peas, runner beans, French beans, spring onions, sweet potato and sweetcorn to follow! I've instigated one veggie meal a week and one cheaper meal largely veggie eg I now make Chilli with lots of added veg and far less meat - enough meat for DH to think it's meaty (he loves his meat) , so food isn't massively more than it was. I've noted some staples are still the same, (eg Waitrose is our nearest and the baked beans are still 4 for £1.20 the family prefers them over cheaper supermarket or Heinz) but have taken to picking up certain items elsewhere / when there's a good offer in bulk.
My spend has gone up by around 12-14% on food/groceries though, so my next move I'm thinking is to cut portion size very slightly - weighing things eg pasta etc rather than guessing too much, using set amounts of meat, veg etc and freezing the rest, as we are all carrying a few lb too many here, and to cut the alcohol and biscuits / snacks for the family down a fraction too - and I think that's my 12-14% recouped. But it must be horrendous if you're already doing all this stuff.