falling MPG issues

[andersun16]

5000 miles on mine (bone stock) and I've been getting 31-33mpg - even with the snows on. I'll keep my fingers crossed.

 

[unwrittenLaw]

how big exactly is the tank in the MSP?

 

[MSP Pro]

See my post on whole year's gas mileage. No drop for me, post flash is the same, no difference at all.

Britt: something's wrong. Have the dealer read the short term fuel trim and the long term fuel trim numbers from the OBD II. And check all your electrical connections under the hood -- some sensor may be unplugged...? Good luck.

 

[jaymode]

I got my flash at around 1000 miles, and now have 3700 miles. I just went on a trip that was total 366 miles and put in like 10.7 gallons of fuel, which is like 34 mpg. This was without skipping gears or driving like and old woman.about 30 miles of that was in town stop and go driving.

 

[JTP]

Sounds stupid but perhaps spark plugs are to blame. I never really noticed how important they are and how much they effect everything, as well as air filter. When I put in a K&N in my eclipse gas miles dropped dramatically, as well as old plugs that had 60k on them.

 

[03MSPRO]

check tire pressure. ALso weather conditions like water on the road, snow and wind affect gas mileage since it increases drag and friction.

 

[gcotton]

My gas milage is much worse now, Im gettin between 200 to 250 miles per tank. And my exhaust tip is black as hell. Plus the car always smells like gas. WHAT THE HELL IS GOING ON HERE.
Not to mention lately 1st and 2nd gear is runing crazy rich. Feels like it wants to bog down

 

[pluto316]

mines gotten really bad with MPG and its just a p5 its really annoying i wish i had a 5th gear sometimes.

Trust me, the difference between the auto o/d and manual is pretty much nill. Doing 100mph the other day I was really soaring in the RPMs in 5th gear. I could actually see the needle going down slowly.


Damn you Mazda!!!


(J/K baby, I love you.)

 

[yashooa]

I got my flash at around 1000 miles, and now have 3700 miles. I just went on a trip that was total 366 miles and put in like 10.7 gallons of fuel, which is like 34 mpg. This was without skipping gears or driving like and old woman.about 30 miles of that was in town stop and go driving.

Hey! Who's an old woman ya BASTARD

 

[AutoBox]

i have had bad gas mileage since i got the car...i last about 250-300 max on a tank with a mix of city and hwy driving...im a bit of a lead foot but it is excessive..i toss it up to the rich ass tuning....hopefully ill fix that

 

[muohio]

My first tank of gas yeilded 350 miles and I was pretty happy. Lately though, I'm lucky if I hit 300 miles on 12 gallons. I had my car flashed shortly after the second tank of gas and my car is completely stock. Like others have noticed, there is black residue around my exhaust tip.

 

[SpcyOrangeMSP03]

wtf, i thought something was fishy, on my last three fillups around12-13 gallons i only get about 230 miles before the light turns on then maybe 270 all out. the fuel goes so fast in my car.

 

[funnylittlman]

I was 22-23 city

now I'm at 20 to 21 city

26 hwy

 

[mspdfreak]

24-5mpg city; 35-6mpg hwy.

 

[boostisgood]

WEll, after resetting my PCM, and driving the turnpike yestserday. I yielded about 340 miles on 1 tank of gas. Dunno whats up with that, but I will pay CLOSE attention to this again.

 

[KyRaceFan]

i get about 250 - 280 a tank.. depends if i'm lead foot'd..

i get about the same.

Always fill it with chevron 93. I did notice it dropped the 1st tank after i got my hard pipes and BOV on, but its back to normal.
The most i EVER got was 330, and that was ALL highway, cruing at 75-85mph.

 

[srtchick]

Actually, I have noticed a drop in mileage since the flash. I only get like 50 miles out of a 1/4 tank now on the highway...constant speed around 75-80mph, occasionally faster to pass.

same here but im not even flashed :wtf: (dont realy plan on it either)

 

[MSP#735]

Im gettin 'bout 23-25 city...thats the majority of my driving...Flashed recently though...we will see how my mpg improves or deteriorates as time progresses. I do however, get on it from time to time but on rare occassions, i.e whenever im having an awesome day!!

MSP#735

 

[funnylittlman]

I got 22 mpg all city and just a 46 mile jaunt on the Captal belt way. I think it has something to do w/ my 6 mi commute to work with 19 redlights on the way. There's no way to get out of 2nd *sigh*

 

[Wiggles6983]

i get about the same.

Always fill it with chevron 93. I did notice it dropped the 1st tank after i got my hard pipes and BOV on, but its back to normal.
The most i EVER got was 330, and that was ALL highway, cruing at 75-85mph.

Same here, chevron 93, 275ish average, and 330-340 75ish mph highway