webby87

Hi current US owners
Curious what mpg you guys are getting?

Serg675

Just have done my second refill. I use the app to see MPG which is calculated by using actual galons and miles traveled. Don't trust much car computed MPG.
It shows me 20.9 MPG of suburban driving. Since the car is new I have used all modes for some periods to get feeling of it. So it's mixed bag. Plan to stick to just one until next refill to see MPG for particular modes. Mostly to understand the difference between ECO and Comfort.

Serg675

Have burned another full tank. This time have used eco mode allways. Got 22.3 mpg. It's little bit below declared 23 mpg of the city driving.

190Efan

Your gas mileage will increase as you drive more miles and your engine gets more broken in.

Serg675

The MPG I have mentioned is not overall but between tank fill ups.

BenjaminKohl

They are saying that over the course of months, the engine becomes more efficient. Although, cars are also more fuel efficient when the tank is almost empty - they are lighter.

190Efan

You entirely missed my point. As the new parts in the engine begin to function and get broken in, they start to work more smoothly and this raises efficiency and gas mileage, not how much gas is or isn't in the tank.

BenjaminKohl

no, I understood your point and was trying (poorly) to explain that. Serg seemed to think someone was saying their MPG should be better and was confused because gas mileage doesn’t get better in one tank, and I was saying that the person was simply trying to explain that as the car gets broken in, and many months go by, gas mileage overall will increase a little.

I simply added the little anecdote that technically because MPG is partially based off weight and gas is heavy, as the tank gets empty, instant gas mileage is a tiny bit better, although not a noticeable amount.

190Efan

Thanks for clarifying your post.

Serg675

Just finished 1000 miles trip. Was driving two day times with night sleep in the hotel in the middle. Total MPG was shown as 33.6. Last leg (freeway driving only) 35.6. Comfort mode all the way.

giovane

I don’t trust the computer so I reset the trip every time I fill up the tank. With 80% highway drive, I average 31 mpg. Sometimes more, sometimes less, I’m at 6,800 miles now.

23C300W4

In town we get 22-23MPG. On the highway it's more like 33MPG. Always in Comfort mode.

KE5TNY

Highway 34.5 in eco mode

Serg675

Adi-Benz

How is it possible only so much? My CLS with the 3.0TT V6 gets almost 30 on longer drives and 24 around town.