krazykevin

There is no way you get 31 going above 70. End of story. Not being a jerk but that is not possible with the 4.6.

28-30 is possible if you drive a full tank and a constant 45-50 MPH and this would be not stopping at all.

on another note I do not trust the Mustang computer. But by manually calculating MPG, the highest I have ever seen (by my own calculation) was 28.7 MPG for a tank of gas. This was on the Natchez Trace with a speed limit of 50 mph and I was trying to get gas mileage. 87 tune, lowered, cat deletes, not running AC (fall time but before winter mix gas), cruise control and no traffic.

302Travis

In the summer id average between 25-27 running 70-75 most of the time.

PNYXPRESS

well whats was my mileage then,on a trip of 427 miles. I started with a full tank and filling back up took just over 14 gallons. and I was on I-95 running 70-80 mph the whole time.

danzcool

LOL, sounds like downhill and with a tailwind the whole way, while drafting a big-rig...

yourmom6990

I've had plenty of people let me go by in my beater 06 cobalt. They must have mad respect for little chevy.

PNYXPRESS

They do the same for my fox. But I think it's more of a " I better get out of his way cause he don't look like he could stop and probably doesn't have insurance" than a respect thing.

Some people are just better drivers and actually pay attention to their mirrors than others.

krazykevin

thats record breaking stuff right there

PNYXPRESS

Well I've done it several times. Granted this was on the stock tune and stock body panels. Car won't do it now with the splitter setup and tune

V8StickConv

Just an update: city driving mileage is about 13 mpg. I did not buy a 4.6 V8 5-speed not to get on it, so that's not conservative driving stoplight to stoplight. Also, the car is responding to being driven by performing better. I've run two tanks of 87 octane gas thru it since I bought it on Saturday. I intentionally ran the tank down until the warning light came on to get all the old gas out of it. I'm guessing less used fuel injectors are responding to detergents in the new gas. Is anybody using a product like Seafoam gas treatment to keep up performance?

PNYXPRESS

Try running mid grade fuel. I found with my sixxer it gained a few mpg over 87 octane