What grade of gasoline should a Grand Cherokee use?

[ValerieFitz]

Grand Cherokee should use 93 octane gasoline. It's best to refuel when the fuel light comes on: Generally, it is not advisable for fuel-injected vehicles to wait until the fuel is nearly depleted before refueling. This is mainly because the fuel pump of fuel-injected vehicles is installed in the fuel tank and relies on gasoline for cooling. If the fuel is about to run out, it can easily cause the fuel pump to overheat and burn out due to insufficient cooling. Refueling at night or early morning is more cost-effective: The best time to go to the gas station for refueling is at night or early morning. This is because gasoline is charged by volume rather than by weight. At night or early morning, the volume of gasoline is relatively smaller, and the same volume of gasoline can have better quality, is less likely to foam or evaporate, making it more economical to refuel during these times.