Hello,
I'm hoping I'm just over thinking here...
My meter guage resembles the one in my attachment.
Since buying the car 2 years ago, whenever I fill up my tank the gauge shows as full (20 bars).
I can travel up to 50/60 miles before the first bar goes (to 19). And then the bars steadily decrease.
Overall, it usually works out about 25 miles per bar.
But today when I filled it up the bars started reducing straight away.
It went to 19 bars after 23 miles, 16 bars after 100 miles - which is accurate, but it's just that it didn't stay full on 20 bars for that first 40/50 miles, and steady decrease.
Although the miles per bar is accurate, it's just that this is the first time it's started decreasing from the off.
I don't know if I'm worrying about nothing or if there's something that may be cause for concern.