I put mine on at the beginning of December, so I haven't had it too long. But I haven't noticed any MPG drop at all.
My truck windows are all VERY darkly tinted, so I don't really notice any issues with the topper windows, and I also added the tinted rear window panel to mine too.
I keep it...
2025 hybrid AWD
Hitting some local fire roads, just north of the Mexican border. Weather is perfect this week, but a couple days of rain on the way for Christmas.
I'm looking to get the Goodwin front springs in January, just to get a little lift in front to level it out.