Granted, I'm still getting used to the 5.0, but I'm averaging 9.6 miles a gallon city driving! I know that can't be right. Can it be my shifting? I shift around 3k rpms.

 

Stop doing the burn outs.....JK. Nah that don't seem right!

 

That doesn't seem right at all unless you spend most time sitting in bumper to bumper traffic. I'd make an appointment at your dealer and have the PCM program updated, we've done that to few different vehicles that have come in reading extremely poor MPG's

 

Are you going by the dash readout or actually figuring it on each fillup? The longer the stop lights, the lower the MPG goes. I shift at 3-4000 and very seldom use anything above 4th unless I am over 50 mph for an extended time. Local speed limits are 35 to 45 on most roads....traffic is 45+. I average 17-19 around town and I can even leave it idle with the A/C on for the wife if I am just running in and out of a store.

Yours does sound low. Are you doing hard accelerations?

 

The OP's avatar sig shows he's in NYC. A little bit of a heavy foot along with stop light - to - stop light driving and I can possibly see it. And shifting at 3k in town for normal driving is a bit high.

 

I agree with Nuke, and if it's new or realitivley still new you're wanting to have some fun! And once you get used to it and lighten up your right foot it should go up.

 

I think Nuke nailed it right on the head lol. Yea, I go by the dash readout. So you're saying that while idle at a light on neutral my mileage still goes down? That kinda sucks. I usually rev to 3k to get rid of the 1st to 4th message.

 

yep, while at idle the engines still using gas...but your not moving cuz of the light, burning gas at idle + not moving = crappy gas mileage, the longer the red light, the worse your mpgs. thats why all them fancy european cars and hybrids have an auto shut off when stopped.
also do hand calcs when you fill up, the onboard usually reports 1-2 mpgs lower than what the cars really getting ( least in my experience )

 

Factor in the cold weather as well as its not summer yet.

 

It's like food...the better something tastes, the more it's not good for you.

Mustang: the more fun you have, the more it's not good for your gas budget!

Life is seldom fair...