MPG different between Sports and Base?
 

I traded in my 2010 Base Coupe with 43k miles for a 2013 coupe with sports package and 8.5k miles. While I love the 2013 and especially it's brakes (I had to squeeze between two cars at highway speeds), I am finding that while my 2010 base coupe gave me 24-24.5 mpg in highway driving at 75+ mph! my new car is a couple of mpg less. It seems to be between 22 and22.7 mpg.

I don't' know why but there is a decidedly less mpg at the same speeds.

I average around 25 mpg on my 2013 and it's still pretty low mileage at around 1500 miles. Are you running the same oil, tire pressures correct, air cleaners clean?

All jokes aside..My 2010 Nismo was running the above mentioned 24 - 24.5
mpg even 25 mpg with no wind and allot of Mother's carnauba car wax.. I
have seen a significant drop in mpg as of lately..One big change is my weight.
To many runs to the Taco Bell, The King and many Round Table x-large King
Arthur supreme pizzas.....I have affixed a motivational photo for your refrence.GL

http://cdn.sheknows.com/articles/201...rd-simmons.jpg

Have not checked any of these. It had only 8.6k miles and I just have driven it for 7 days for a total of about 900 miles including a 450 mile round trip. The dealer had stated he had changed the oil, claims it has synthetic, it looks clean. I have not really checked the air but the TPS light has not come on. I have not checked the air filter.

Maybe, I will just go get an oil and oil filter change and check air tomorrow.

Shouldn't be too different. the sport does weigh slightly more and has larger (heavier) rotors and wheels. Sport cd is 0.29 and base os 0.3

A ton of other things could factor into this, from the ambient temperature and humidity to the brand of tire or the weight of motor oil.

Thanks. The tires are OEM. The oil seems new and clean and the air filters are not so bad. In any case, it is what it is.

Averaging 26-27mpg at 80mph base, however I only weigh 140lb

Sports package (includes the extra weight) very well may get slightly less

Also depends on environmental factors

The new engine could just need to break in.
Nevermind missed the car was used, could be the way it was broken in...

I have the sports manual and back roads to work I'm at 25 mpg considering I tend to put the pedal to the metal few times to pass the driver who may at one time or another worked at a funeral home driving way below the speed limit :rolleyes:

In the past when I bought a used car the first thing I would do was change the oil, that way way I knew for sure it was nice clean and fresh. Go with synthetic for extra mileage and as mentioned it won't hurt to check tire pressures and get some clean fresh air cleaners too. Maybe go with K&N for extra efficiency.

That's not bad I average 21 on the highway and 17 city

I get about 14 city, 30 hwy fwiw

Gas Mileage
 

WHY? My 2012 got 24.5 to 26, my new 2014 gets less, 22.5 highway. Has the gear ratio in the rear end changed?

Mpg is relative the way you drive your Z! Goes with any vehicle you drive, unless you ride a horse!
I have sports under 60 miles freeway i get 28mpg
Normal me driving 18mpg cant post my speed against forum rules.

The problem is that I am the driver, driving no differently now than with my 2010 base and the mpg is definitely less.

Soon, I will get an oil and filters changed, re-check air and see if it makes a difference.