05-14-2017, 12:50 PM
Tom you can calculate gal in tank at genny pick up by measuring to get cubic inches. Remember to allow for metal thickness on walls of tank. Convert cubic inches to cubic feet by dividing by 1728. Each cubic foot has 7.4805 gallons. I also use VMSPC and find it is within +/- 1 gallon on 200 gallon fuel burn. I try to always fuel before going lower than 50 gal remaining just in case I run into an issue find access to fuel such as late at night or on weekend in really small towns. Before VMSPC I would also use odometer & figure 5 mpg to be on safe side to not run out of fuel.