2016 Outback Premium 2.5 CVT w/EyeSight+SRVD
Both. Pumping losses in the engine are also lower at altitude. But reduced aerodynamic drag due to lower air density is probably the dominant factor. Air density at 5,000 feet is about 15% lower than at sea level.Is that due to decreased air resistance, or due to preventing the car from getting as much air (thus fuel) effectively lowering the maximum throttle?