Diesel tanks have a tendency to attract algae if the tank is allowed to sit for an extended period of time without being filled. This is partially due to the nature of diesel fuel. Algae presents a real problem, as normal diesel engines cannot burn it for fuel, and it can clog the fuel filter, causing hesitation and engine stalling. To remove it, you’ll need a commercially available diesel fuel tank cleaner.
Open the gas tank door and remove the gas cap.
Pour in 0.64oz. for every gallon of fuel that you add to your fuel tank.