I feel like there's an issue with the Oil Plus's range. It showed a 300 range when parked, but dropped to 267 once I started driving.

The range is calculated based on the real-time fuel consumption of the last 50 kilometers. If you drove at 120 km/h, then at 100 km/h, you'll notice the range increases the more you drive. When I fill up the tank, it shows a maximum of 750, but mostly around 680.

It's normal. The computer calculates based on your last trip's fuel consumption pattern, and sometimes it might show more.

This phenomenon happens with all cars. The remaining range display can be different between when you turn off the engine and when you start it next time. It might be related to the temperature of the fuel in the tank.

Sometimes, the data from the last time you used the car only shows up the next time you start it.