I get about 19 on regular street roads and about 25 on highways/long trips.

full tankof gass
300 mi. on streets
400 mi. on high way


holds aprox. 20 gal. I usually have two gal. in tank when I fill her up again.

 

^ 19MPG in the city? That is amazing!

 

I havn't driven mine in forever since the engine blew but I was around 17.

 

Its usually not the car that dictates the gas mileage but rather the foot pressing on the gas petal

STEPHEN

 

A/C makes a big difference too. On long trips i can get 25 mpg on the highway without the A/C.

In they city I'll get as much as 20, and as little as 18 depending on my foot

 

My Canadian 93 base manual got 17 mpg
My US 93 touring automatic gets 20 mpg
My 95 Ford supervan gets 18 mpg on regular

I drive the Rx

 

geez i couldn't imagine paying as much as you guys do for gas.

Here in FL its 1.75 for 93 octane, and thats considered EXPENSIVE.

 

12 mpg. You gotta pay to play.

 

lets go east coast...haha

 

i got about 20 on the highway in my auto rx, taking it real real easy, i would imagine a 5 speed would get a little better, i have never calculated it in town, but i think there is a big difference between the highway and city driving, i now have a 5 speed though, hooray for me

 

How does the Power FC give better gas mileage?

 

I get 10-14mpg city, 18-26mpg highway depending on how I drive. Car is mostly stock.

Recently bought a new daily driver.. Dodge Ram with a 5.7 L V8 Hemi engine. My co-workers were calling me crazy because of its gas mileage, but it's the same as my car (for my city driving commute.. the RX-7 gets better on the highway). Having another car as a daily driver is really great; I no longer have to feel bad daily for abusing my car with a no-fun-to-drive commute in traffic. Highly recommended.

 

I get 19-20

 

21 Hwy 16 City. Yeah... you shouldn't have gotten a 7 if you are going to be "broke" after bying gas for it. You need $ for the Mods. (:

 

yeah i have a 92 Mustang LX 4cyl beater.. 27-30mpg fools! go ford hehe

 

I question the capacity of the fuel tank. Mazda claims 20 gals. Everytime I fill up ( I do so as soon as the light comes on) it only takes about 16.5 gallons. Is there that much reserve in the tank?


Oh and I get about 16 mpg in the city.

 

Open highway 80-90mph off boost 24-25mpg
Around town driving "normal" (i.e. on boost) 15ish

 

I've never actually let it go empty before. think its bad on the fuel pump?

I agree with jpandes

 

I've never actually let it go empty to find out if it does hold 20 gal. think its bad on the fuel pump?

I agree with jpandes

 

Now having seen all of your mileages, I am concerned with mine. I'm getting 10-12 mpg on NO BOOST. I have a boost gauge and I hardly ever get on boost. I shift before 3500 rpm.

What can I do to improve my mileage at least to standard levels. Don't tell me to ease off on the throttle. Serious answers please...like O2 sensor, clean injectors, etc.

Tonight I'm going to change the O2 sensor and clean the injectors. Anything else that might cause low mileage? I just rebuilt the motor with street port. Have new spark plugs. I've only driven 300-400 miles on the motor so far. I tried spraying carb cleaner around the intake system to check for vacuum leak but can't find one. I show 14in.hg vacuum at 850 rpm but usually after driving and then coming to a stop my idle sits at 1100-1200 rpm, why is that?

 

actually gas is now 1.60$/gal for 93 octane w00t!

 

Okay, get ready to laugh and poke fun. I was installing my turbo timer yesterday and spliced the three ignition wires then attached the ground wire to my ecu where the ground strap is (my ecu is not mounted just sitting on the floor).

I turned on the key and the turbo timer wasn't working. So I tested the ecu cover for ground and it wasn't grounded. So I attached a strap from the cover to the body and then the turbo timer worked.

So this whole time my ecu wasn't grounded. How do you guys think the car would run without the ecu grounded? I noticed now that my car runs a lot smoother at low rpm without boost. I tried to drive the same as I was before and now I noticed that it runs a lot better. Do you think that it was causing me to run too rich? Causing the bad mileage and slow performance?

Thanks for all your guys' input.

 

I used to get about 200-220 per tank, but I have a feeling the addition all 1700cc injectors and a street port will make that number go way down.

 

heh, well i'm running 550ccs and 1300cc injectors, and i manage around 300-350 miles to a tank, mostly highway miles though to my girlfriend's house.

 

i get about 17, but i dont have a rx7...yet