I have a 2004.5 roadster with 58k miles

before i bought it they topped off all the fluids and did an oil change. Tires/ wheels are aftermarket but they are checked once every week/week and a half at discount tire so they always have the correct psi.

I am only getting about 190-200 miles per tank ( i fill up with 13-14 gallons) and the computer tells me i'm getting 16mpg. ( all city trying to keep rpm's under 3k and brake gently)

Any things that i can do to get my mpg up to at least 18 like my previous car a mustang that was a v8??

 

drive on the highway more..... i only get around 17-19ish in the city.

 

I have the same problem...and its costly since our car needs 91+ octane...

Anyway, should we need to keep the RPM from 1800-2200 for good mpg?

 

City mpg is terrible. Your figures aren't that far off the mark.

I haven't found a way to get 20mpg in the city regardless of driving style and shift points.

Take it on the highway for 10 miles uninterrupted at around 70mph and see what your mpg is. If it isn't over 20 you have an issue.

 

checked your air filter? Mine had a bunch of fall leaves blocking air flow.

 

Mine was doing the same. about 16 mpg, mixed city and highway and it says I did an average of 21 mph. Last week I took someone else's and advice and tried as much as possible to stay under 3000 rpm and whadya know, I actually went to work and back all week on the same tank when I was used to filling up at least on thursday. I can go up to 80 mph in 6th I believe which is faster than I need to go, but sometimes I'm in a rush. Try it out and get an oil change and air filter change as well. I just did, so maybe my mileage will get even better.

 

I get 16.3 MPG on my Stock 07 Normal i guess

 

what is the oil presure needle supposed to be whenever your idleing????

Anyone want to post a howto link on changing/cleaning air filter?

 

I didn't believe it until I saw it for myself but my mpg went up a little bit after putting nitrogen in my tires.

 

About 15 or 14 psi I think. The stock needle should be about half way though the quarter mark (so an 1/8 of the full gauge)

 

mines between 0 and a quarter when idle.

Just got a new oil change, anyone know what might be wrong??

 

Last fill up I had 23MPG with mixed driving. I never had a fillup in the teen MPG range...

 

best you can do is to unplug 3 ignition wires. This will increase your mpg from16mpg go 32mpg.

 

 

also one of your spark plugs could be bad. i had one go bad and i was only getting 14 on highway and was like WTF. replaced them and it was fine. wierd i know

 

try putting in a round or two of techron, that stuff works like a charm, i put in a bottle every 1000 miles, and its GREAT for the fuel system...

 

ya forgot to add injector and fuel system cleaner. Im a tech and would try that since its only like 20 bucks

 

when should you normally replace the spark plugs/wires on a z , on the mustang you replaced them every 70k....

 

i would every 60k on a Z. dont worry about the wires themselves. just the plugs

 

Hey, does all the extra additives REALLY work for fuel preservation and stuff? I never really believed in it.