Getting 430 Miles to the tank?

[oh3speed]

I used to get only 330 back before i had my unichip. Then i put it on during the winter and i still got around the same. As soon as it got warm i started getting 400+ ? idk why that would have happened. Any ideas?

[Rally Ninja]

Wierd, I was at about 260 before and 320 after.....

[yashooa]

Heck, I have always gotten over 400 miles out of 12 gallons.
I get a little better after the MPI was installed.

[B1GHAM]

I used to get only 330 back before i had my unichip. Then i put it on during the winter and i still got around the same. As soon as it got warm i started getting 400+ ? idk why that would have happened. Any ideas?


gas is "winterized" during the colder months and is more oxygenated. This will yield about 2-3mpg less than summer gas. Its normal to see an increase during summer months depending on the condition of your vehicle.

the Unichip corrects alot of the stock tune issues of running extremely rich which helped your situation considerably. You are now no longer wasting as much gas as you did in stock form.

[BOOSTR]

Its more than likely a function of your driving style combined with primarily highway driving more than anything else. Stay out of boost and you'll get great MPG's, after all its a 4 cylinder. I have no ems and can get 30+ mpg's, but I didn't buy the car to stay out of boost.

[vangj01]

I just bought my car the other day and they pumped a full tank into it for me. I've been driving it and right now it seems I've put about 200 miles on it and the fuel gauge reads a little over the 1/4 mark. I don't think I'll even reach 300. Of course I've been testing the car out so that'll probably affect it, so hopefully my next round of gas I can test it more.

My car seems to hesitate a lot. I'm not 100% certain if it has been reflashed. I called Mazda today and the service guy couldn't tell me jack. He didn't even know about the flash. Under the hood there is a label that states "Mazda Authorized Modification", but I'm not sure if it is for the flash or something else.

Should I waste my money on the flash, or should I just invest it in getting the DSM AFC? Will the DSM AFC fix my hesitation problem and also give me better gas mileage? Right now all that is in the car that I know of is an Injen CAI, Autometer boost gauge and A/F ratio gauge.

[SpcyOrngMSP]

the flash is free, just bring it to the dealer

[B1GHAM]

the flash is free, just bring it to the dealer*

*assuming the vehicle is still under the factory warranty.

[Pmpkinhead]

I have always got 23 - 27 per gallon, never better! If my trip meter is nearing 300, I better have a station nearby!

[vangj01]

The car has 51k+ miles so it is out of the factory warranty. I have the extended warranty, but I think there is a $100 deductible. If the flash is $80 or so, then I would have to probably pay for it anyway. First I need to find out if the car has been flashed or not.

Does the flash help with your gas mileage as well?

[2.0t03speed]

there is a tsb out for the ecu flash its free i can send you the tsb number if you like

[kamon8404]

I wish I got even close to 400 miles. I get about 300 even when I reach a quarter tank (thats when I fill up, yea I'm pretty anal about it).

[yashooa]

I wish I got even close to 400 miles. I get about 300 even when I reach a quarter tank (thats when I fill up, yea I'm pretty anal about it).
Well I get from about 100 miles per quarter to just over that so you are in the same range. I get gas when the light comes on and I usually put in about 12 gallons.

[vangj01]

there is a tsb out for the ecu flash its free i can send you the tsb number if you like

It seems the flash has already been done. See thread below that I opened.

http://www.mazdas247.com/forum/showthread.php?t=123672407

[vangj01]

I measured my gas mileage a little more closely this time and I got about 350 miles when the gas light turned on. I think the light comes on when there is still 2-3 gallons left. So it seems I probably get around 27-30 mpg. This is a mixture of city and highway miles. Mainly normal driving and not much turbo boost. Atleast I'm in the stock mpg range.

[Gasological]

I regularly get 30 or more to the gallon, unless I've been running the A/C constantly *grumble whiny girlfriends grumble*. Last tank was 31. Mostly highway and suburban driving.

[DiscreetSpeed]

400 miles per tank?
wow! man the most i "squezzed out" is like 360 with the stock set-up.
now i get maybe 300.

[CitizenPro]

i hit another 350-360 to the tank. I cant seem to get past that no matter how i drive.

[warrier04]

even all highway i don't hit 400. i think i come somewhat close, but a steady 95 mph hurts when the engine is at ~4800 rpm.

[BradC]

Seriously, how do you people drive that you eek that much out of one tank??

[Gasological]

+/-80 mph on highway, shifting generally at 3-4k rpm getting up to speed or moving around town. Admittedly, it's not how these cars were made to be driven, but there's a crap ton of cops in my area. When they aren't around, I still have fun with her.

[BradC]

+/-80 mph on highway, shifting generally at 3-4k rpm getting up to speed or moving around town. Admittedly, it's not how these cars were made to be driven, but there's a crap ton of cops in my area. When they aren't around, I still have fun with her.
Damn man, that's how i drive when driving normal and dont get anywhere near 400 to a tank.

[chaos2015]

my like usually comes on around 360-375 and i regularly get 400 to a tank, the only time i dont is when i'm up in philly in all the stop and go

[dannyboy17]

thats crazy, I never get more than 300 miles per tank, doing 70% city and 30% highway. Yall getting 350+ need to hook us up with ur secret cuz I woulndt mind getting a few extra miles per tank.

[Jgar_msp]

330-340 miles per tank in the city and the short trips that I make since I live on a base and don't really have to go far.

400+ miles per tank on highway when I take those road trips

so about 27mpg city, and 32 mpg highway... I've kept track of it, I don't really drive above 70mph, I save it for the autoX days. =P


...I wonder what would happen if I got this unichip u guys keep talking about.... I'm considering getting it for the MPG

[Gasological]

just did 389 miles on 11.67 gallons. So thats like, 33.333mpg, driving at 80mph coming down the PA turnpike and I70, except for the last 40 miles. And the air conditioning was on most of the way. Might be the ECU learning the CAI, I dunno.

[CHICO2003]

having the heat on during winter is going to lessen your mpg as well...