Gas tank discrepancy

[HumminNBoatin']

x3.....Usually 26gallons gone when the light comes on. The most I ever had to put in it was 29 and some odd gallons. If you are doing long hauls or towing and have LARGER than stock tires pay no attention to your computers calculated gas usage. Its going to be off. Mine is always within a gallon but it gets way out when towing the boat on long hauls through the mountians.