On my 3rd tank it showed 7/8 for first 50 mile then full for 20 mile. Same as first tank. If this holds true, I would tend to think the sending unit is placed in the tank where a bubble forms. This bubble can not burp until the tank is slightly below full.
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2010 Smart 
Same as first tank. If this holds true, I would tend to think the sending unit is placed in the tank where a bubble forms. This bubble can not burp until the tank is slightly below full.
Today
Linear Mode
