Some modern cars DO get better fuel economy with premium. The problem with your statement is that you are thinking of older cars. Most modern cars are tuned to take advantage of higher octane in an effort to squeeze as much performance out of them as possible.
Some modern cars will experience...
ECOās biggest advantage is cylinder deactivation, which IIRC will only happen under certain circumstances like driving at a steady speed for so many minutes (I.e. highway driving). The reduction in gas pedal sensitivity and the transmission gear shift map change helps, but it doesnāt really...
The easiest way to gain more MPG is to accelerate slower, and drive slower. Do not carry any extra weight that you do not need. Do not carry extra āstuffā on the outside of the vehicle (any addition to the outside of the vehicle will add drag).
I do a lot of highway driving and frequently...
I can tell you that there is a lot of vehicle data that can be accessed by a dealership, and can be used to deny a claim if vehicle abuse is suspected. I worked at a dealership that did this.
The problem with audio is itās very subjective. What sounds great to someone might sound awful to someone else. I love my B&O, but Iāve never been a sound snob.
Well, this is interesting. I did a 3 hour drive today, HVAC in auto mode with recirc on and it never switched recirc off. So it definitely does not automatically turn off all of the time.
It wonāt be much, a few miles per gallon, but it adds up. Eco mode uses cylinder deactivation under certain circumstances, such as highway cruising.
https://www.broncosportforum.com/forum/threads/when-does-cylinder-deactivation-occur-with-1-5l-engine.6192/
Itās not just engine mapping, itās also cylinder deactivation and will absolutely make a difference when cruising on the highway.
https://www.broncosportforum.com/forum/threads/when-does-cylinder-deactivation-occur-with-1-5l-engine.6192/
Itās not that it purposely speeds up, itās that gravity causes an increase in speed. Does your car have adaptive cruise? IIRC only models with adaptive cruise will brake when going downhill.