This is how I achieve 3.5+ mi/kWh in my iX 50 w/ 22" wheels:
- Use efficient mode
- Use cruise control to accelerate whenever possible
- Do not exceed the speed limit
- If accelerating manually, keep peak power output under 25%
- Manually turn off AC and set temp to lowest setting, set air recirc to fresh, if temps outside are nice. No need to run HVAC.
- Keep your tires properly inflated to the recommend pressures shown in your door jamb
- Drive it like it was a Prius
Driving this efficiently in such a large, heavy car with large tires requires a little effort but it pays off. For me, the fun of driving isn't raw speed and acceleration. It's being in a comfortable, quiet environment that is stress-free. I find when I drive slower I feel calmer. The stresses of the day melt away. As others pass me I can see how crazy they drive while I'm happy they took their crazy with them and are now off in the distance.
Funny thing is, when I drive at the limit I still catch up to the people passing me at 80 MPH because, you know, traffic.
