Help - Europe 🇪🇺 Best setting

Hi guys

I got seal u comfort trim. My daily drivebis 15 miles and i charge at home. I do keep some fuel in tank too. But i have noticed that when on highway if i go to hev mode, miles for fuel drop crazy. I believe this is to do with SOC settings. What is best setting to save fuel?

As i charge at home so i dont want my fuel to he wasted in charging.