Think of eSave as SAVE. You’re saving the battery for later. It’s a special case use mode. It’s the least efficient mode. Due to the laws of thermodynamics, when we ask the engine to work harder, it is going to use more fuel. When we save or charge the battery using the gas engine, it is going to use more gas.So on the Highway use e-saver ?
You can but Jeep says this is the most inefficient way to run the 4xe. It apparently only trickle charges but has to bump the RPMs up quite a bit to do it.Can also switch the eSave Mode to prioritize charging if you wanted to fill the battery back up, but the hybrid mode will be best for overall MPG.