I have yet to do my first oil change since my '16 GT AWD w/Tech was purchased on 4/1. Will be doing at the 6 month mark since I work from home 4 days a week and won't be anywhere near the 5000 - 7,500 mileage marker (I'm at 960 miles right now). That being said, my MPG the first tank was 26.5 and the next 27.6. Right now I'm sitting 28.0 and will be gassing up today. That is a HUGE difference between what some of the others are reporting on here.