Sweating

[captain]

I don't sweat that much. My best mate does, he is that bad that he uses some form of magnesium gel that he puts under his arms. Weirdo, anyway....

The '8 is certianly making me worried. I started the week (Monday night) with £50 worth of normal unleaded in the tank - the computer read 5 miles and the gauge was on empty.

Computer says I'm getting 25mpg average, which is fine.

I parked the car up last night at it was well above the red bit. Started it up this morning and its well in the red - the fuel pump on the dash and I'm thinking im going mad.
Drove to work and about 10 minutes into the motorway journey the fuel pump light has gone out and the gauge has gone back to what I left it at the night before.

I then restart the car later to do a few miles in work and its gradually reading less and less and less within a few miles. Its then down to 5 miles and I'm sweating like a mental.

Just how far can you go?! and whats with the mickey mouse gauge?!