Petrol dip stick material

[Reckless Rat]

For the RP I use a length of 3/16ths brazing rod, with grooves machined corresponding to 1, 2, 3, 4 and 5 gallons. I then painted the markings with some red enamel. It has a ring bent into one end and it sits unobtrusively in the driver's door pocket. Works every time.

For calibration start with an empty tank and add a gallon at a time to obtain an accurate gauge.