Option 1 is what I do.Well, if you have the S version like me then you are probably getting 21-23 mpg on a regular basis. Keep in mind, the FPace (at least the first 2-3 years) only have a 16 gallon tank. This is small for an SUV. Most have around 20 gallons. My guess this is why you are filling up all the time but note you are putting in less gas than an Average SUV fill up.
Other things you can do:
1. Find another F Pace and draft very closely behind them
2. Keep your RPM's below 1500 - this might extend all your trips times 2 to get there
3. Keep your settings on Economy and D mode all the time and never turn on your A/C
4. Pull a Barney Rubble
Just curious, but what mileage were you expecting?
So, basic questions that others can use to compare: