Fuel Economy on 2005 Mustang

[stanmckinney]

Lately I have been getting just over 12 MPG in town with a factory V8, no mods at all.
On the road I can get as much as 24 or even a bit better.
I would sure like to know the secret for getting more in town. I live about four miles from work and that's my typical commute with a stop or two.

 

[SlideWRX]

Four miles is roughly how long it can take to fully heat up. The coolant temp might show as up to temp, but the oil temps lags it a bit. Some of your commute is running rich to heat up the cats. Do you mean stop like redlight, or stop to get coffee stop?

Without a tune, try to shift under 2000 rpm. I usually shift at 1500-1750 rpm, with a couple specific spots where I WOT 1st & 2nd, just 'cause I can.

 

[stanmckinney]

Stop like at Wal-Mart. Seems like I am there everyday. It is on the way home. I also have an automatic. My legs, arthritis, prevent me from driving a 5-speed these days.

 

[SlideWRX]

It sounds like you are running a lot of short trips, where the car has a little time to cool down between, basically. That's gonna kill your mileage, as the engine runs rich at startup.