The Booster Fuel has 2 types: High grade and Low grade. This page talks about the high-grade type. High-Grade Booster Fuel. High-Grade gives a Faster temporary boost than Booster Fuel (Low-Grade) The High-Grade Booster has a duration of 19 seconds if that timer hits 0, you'll lose that Greater boost if Thruster Fuel is already loaded into the thruster it will switch to it if not it will go dormant until another round is loaded into the thruster. Once again, the only disadvantage of Booster Fuel (High-Grade) is that Thruster Fuel lasts significantly longer than BOTH types of fuel.