Get a dipstick for your tank and carry it in the boot. Poke it in and see what the level is like
Your first post is exceedingly vague too,
How big is your tank
How much volume does £22 equate to
How many miles are you actually going and is your odometer accurate
Fill up
Write down the miles
Fill up again
Write down the miles and the volume
Easy peasy
Ok so there are a few variable here -
My double binnacle is largely a mystery on several fronts, firstly, the speedo is wrong, i got 2 speeding tickets in a week about 5 years ago when i was sure i was doing 30mph, only to find out on the rolling road i was 10mph out at true 70.
so i changed the numbers on the gauge according to the speeds on the rolling road.
So the mileage is likely also bullsh*t as the speedometer isn't accurate.
this may render my entire question invalid from the outset. Hands up, i admit it. But sometimes you need a forum full of other people to help you see the idiotic errors youre making.
its a 7.5 gallon tank.....so if we go off the gauge, which apparently was calibrated in rainbow pixie land like everything else on this car of mine, £22 equates to 7.5 gallons - i should be spending £43 some odd in real life.
Definitely something fishy goin on - and theres no way my car is that badly tuned its doubling up on fuel.
ive done the odometer thing, full tank (according to the magical mystery gauge) to red line and its 120 miles - ive done it several times over the last few years - it did it when the engine was rolling road tuned and did it before it was rolling road tuned and it was virtually the same every time.
What i have not done - is ever run out of petrol. Even when ive been biting my nails just below the red line, ive never conked out.
Maybe, just maybe, theres another magical 50% fuel left.
is there not an accurate aftermarket gauge i could fit that works? or is this a general mini thing.
frankly, all i need to know is how fast im going, how hot the engine is, and how much petrol ive got. surely such a device exists without having to spend £50,000 on shiney smiths gauges.
Also, it would help enormously if it were retard proof so i could fit it - if not, id happily pay for someone to fit it locally because electrics are out for me - but no auto electrical people will touch a mini apparently in my local vicinity - not enough money in it was the last response i had.