Which driving mode do you drive in? Sport, regular or comfort?
How much more gas does the Sport mode use?

 

That mode switch only controls the suspension dampening. I use normal or sport most of the time, comfort when I have passengers. I use sport when towing to firm up the rear.

 

Sport.

Have never once even thought about changing it. Coming from the 4GS F-Sport...this thing feels like a big giant pillow.

 

Normal...not sure what sport is actually for...

 

^^^ The air suspension is only in the rear of the GX and the mode options allow you to optimize comfort when you have a load on the vehicle.
Towing, passengers or a heavy load in the rear cargo area would be the only time that you would notice a difference with ride comfort.

Other manufacturers (Audi for one example) offer a full air suspension that would be more noticeable with the front end engine weight.

Please correct me on this as I do not have it

 

If you do not own a new GX then maybe you should check your facts. It is adaptive air suspension.
I was informed when I purchased the vehicle that it had air suspension and that the adaptive part is the rear will self level depending on the load in the rear. It specifies in the manual that on roads with lots of turns and mountain roads, sport gives better control and that normal is for most driving conditions. Comfort is listed as primarily for open highway, i.e. interstate, toll roads, where you will get the most comfortable ride for the road condition.

 

Valley is right on. The modes only adjust your suspension, and have nothing to do with shift points or the engine. Therefore, the 'ride modes' won't affect mileage.

 

Comfort for me since day 1 I usually drive a lot on the highway.