Is SKYACTIV-VEHICLE DYNAMICS with G-Vectoring Control killing gas mileage?
 

I have a question for you guys in the know that I haven't seen answered anywhere.

I have noticed that the new Mazda 3 and Mazda 6 that were released with the SKYACTIV-VEHICLE DYNAMICS with G-Vectoring Control have shown a large decrease in fuel mileage.

Examples:

2016 Mazda 6 Grand Touring:
City - 28 mpg
Highway - 40 mpg
Combined - 33 mpg

2017 Mazda 6 Grand Touring:
City - 27 mpg
Highway - 35 mpg
Combined - 31 mpg

2016 Mazda 6 Touring:
City - 26 mpg
Highway - 37 mpg
Combined - 31 mpg

2017 Mazda 6 Touring:
City - 26 mpg
Highway - 35 mpg
Combined - 30 mpg

2016 Mazda 3 Sport Sedan (2.0):
City - 30 mpg
Highway - 41 mpg
Combined - 35 mpg

2017 Mazda 3 Sport Sedan (2.0):
City - 28 mpg
Highway - 37 mpg
Combined - 32 mpg

So, anyone know what's going on?
The cars haven't gained weight, hp, or changed gearing in any way that I can see, but their fantastic fuel mileage has dropped noticeably.

BC.

That's weird. Are these figures all from Mazda or EPA?

Paul

I think I remember there were big changes in the way they tested mpg...........so the #'s changed to reflect that

more real world #'s likely

Yes:
https://www.fueleconomy.gov/feg/ratings.shtml

change in testing methodology. different test = different answers

Thanks guys.
I just couldn't understand why the numbers were so different between 16 and 17.
It not like it says it anywhere, at all.

BC.

no, and yes to different testing method.