[trogoth]

I have a 95 v6 mustang, auto. A few months ago I bought an intake for it. The CAI from Americanmuscle. But I didn't get any tuner or anything. My gas mileage has seemed to have gotten really bad since then. I'm not sure if it's just a coincidence and something else is wrong. But I'm curious if it could be that the computer is just dumping fuel in because it's getting a lot more air now.

Anyone know?

[6ER THEN I 8ER!]

it won't be due to a tune or because of the amount of air flow...if it does have anything to do with the intake it will be due to something like you had accidently damaged the MAF sensor during install...other then that it's most likely unrelated looking at the time line....when was the last time you've

-replaced spark plugs
-fuel filter

[trogoth]

I bought the car back in June. I haven't replaced anything on it yet, nor do I know when anything was last replaced. I checked a spark plug today, it looked fine.

[6ER THEN I 8ER!]

well you have 5 other plugs....so take the 20 minutes and pull them all...and if you have $15 then go ahead and replace them. I bet they could use it even if they "look" ok to you...also the fuel filter is a cheap replace as well...usually around $10 and is great to replace every 50k miles

[trogoth]

okay. i'll try those things. hopefully it'll work. thank you.

[6ER THEN I 8ER!]

Originally Posted by trogoth okay. i'll try those things. hopefully it'll work. thank you.

no problem...let us know after a tank of gas or so if it helped

[Green_6er]

when was the last time your oil was changed? stupid, ik. but i got 15 mpg then after i changed my oil i started getting like 20 - 25. (oil was like a year old and had like 5k miles on it)

[RandoRando]

my fuel filter has never been changed and i have 90xxx miles. i get around 230 if im lucky to a full tank.

would a filter affect it that bad? my oil is up to date, spark plugs havent been changed in about 30k miles. and my tps sensor has low voltage but i keep it in low rpms alot.

[Green_6er]

what kind of plugs did you put in it? if they were copper, then i would change them.

[01Lightning]

Did you really get 5-10 better mpg from an oil change?

I bought my car over the summer, my mechanic gave it two thumbs up, and no problems so far. I'm only getting 15mpg now. I do no highway driving though, so that may be why.

How much highway driving do you do to get 20-25mpg?

[Green_6er]

about 70%ish. but i drove like 25% highway for like 2 weeks and got 20. (i'm a manual btw) and yes i really got that much mpg from an oil change.

[01Lightning]

Thanks for letting me know that.
I can't really hope for much more than 15mpg, I drive a lot in school zones, neighborhoods, and stuff like that, and never on the highway. (I don't spend that much on gas anyway, so it's ok)

[Green_6er]

well since your an auto your mpg won't be that great anyways.

[goren813]

You should be getting more than 15mpg unless you floor it all the time.

Fuel filter will decrease your mileage if its got a clog or real dirty. Spark plugs also if they are corroded and not producing adequate spark. As mentioned your MAF sensor can affect mileage as well if not operating properly. I'd get the CAI off and inspect the MAF, throttle body, and IAC. Clean them up, and do the other things suggested and let us know.

[6ER THEN I 8ER!]

Originally Posted by RandoRando my fuel filter has never been changed and i have 90xxx miles. i get around 230 if im lucky to a full tank. would a filter affect it that bad? my oil is up to date, spark plugs havent been changed in about 30k miles. and my tps sensor has low voltage but i keep it in low rpms alot.

[whyxitx]

230 to a full tank? Wtf i'm getting like.. 200. and i even took my mach wheels off so i had less weight on my car ( and winter is coming) i've replaced fuel filter spark plugs and my oil in the past 3.5k miles too. ( probably less actually..)

[Skargon]

I get 270 a Tank, And thats with Spirited Driving.

Slow 150Hp FTW.

[Green_6er]

i get usually like 25mpg w/o spirited driving. 20 with spirited drivng

[Skargon]

I get 21 when I Drive Normal, And when I try to save gas and Take the Highway, I hit at least 25.

Maybe I should try to save gas more... Lol

[SlowSix]

I get like 18 in the city / 24 on the highway.
I have a tendency to put my foot in it though