Ok this is weird...

1993 silverado sportside 350 V8

This morning coming home from work the needle was one needle thickness
over the half mark with roughly 220km on the odometer.

Got in the truck a couple of hours ago and it is reading 3/4 tank of
gas and almost at 300 km and still over half a tank of gas left
according to the gauges.

Now when I first got the truck I would easily get between 300 and 350
by half tank but it's slowly been decrreasing in the past couple of
months and today it seems to be back to where it should be

Any ideas what would cause this?

Yes the needle does move in case anyome asks if it sticks as it went
from 3/4 tank to somewhere between half and 3/4 by the time I parked
it again and turning corners hard the needle does fluctuate on the
dash so it is working.

I'm thinking a build up in the line somewheres and finally let go?

"Michael McNeil" <michael_mcneil (AT) hotmail (DOT) com> wrote

I think using the gas gauge to meter fuel economy is a completely useless
practice. The gas gauges on these trucks are great for ballpark figures
"yes I need gas" or "no I don't need gas" but far too innaccurrate to be
used to measure fuel economy.

Try using your trip meter and litres per fill to determine fuel economy.
I'm sure you see that the gauge moving around like yours has does not
correlate to fuel economy.

Doc

I'll have to start doing that then, basing it on mileage and not what
the gauge says.

On Thu, 2 Dec 2004 14:03:26 -0500, "\"Doc\"" <noway (AT) nope (DOT) com> wrote:

"Michael McNeil" <michael_mcneil (AT) hotmail (DOT) com> wrote

Some tanks I get 250 miles per 1/2 tank, other times I get 320 miles per 1/2
tank, but either way I'm still getting 15.5MPG! I'm simple enough that I
still get excited every now and then when it takes the gas gauge more miles
to get to 1/4 tank, but alas tis' always the same.

Doc