Not as dramatically as you, but I did have a funny reading just a couple
of weeks ago. I got to work and the gauge read just below 1/2 tank.
When I left work that night, the gauge read about 5/8ths tank and
dropped normally in the trip home ending up at about the 9/16ths mark.
Then the next morning it was closer to the 3/8ths mark which is where it
should have been given the original reading of a little below 1/2 tank.
It had never done this before and hasn't done it since.
I filled it up but it stayed at half tank. As luck would have it, we leave
tomorrow morning on a road trip!!! I guess I'll look up a dealer when we
get to our destination. I wonder if they'll charge me the usual 'shop
supplies', what ever they are. :o) They always find a way to beat the
system, like hiding the actual markup between MSRP and Invoice pricing.
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