No Power

[Sportk3539]

First Kia, 2026 Sportage 1000 miles. Yesterday got into new auto and pressed auto start. Seemed that the car cranked for a longer period of time before starting. Then drove three blocks to highway. Getting on highway seemed like when pressing on accelerator engine no increase in power. Car was weak. I didn't know if it was a transmission or engine problem. Exited highway and then put six gallons of regular gas into tank. This seemed to fix the problem. Thought maybe condensation in tank causing water in gas. Car had about 1/4 tank of gas when this occurred. I drove the next 75 miles without any problem. However, as this is a new vehicle am very perplexed about this. Has anyone else ever had this problem. No warning (Idiot) lights lit up on dashboard. Onboard diagnostic indicates all systems ok.