20MPG

 

20 if I'm lucky.

 

20?? Damn, on a tii?? why is my mileage soo shitty, i used 91/93 octane...

 

I am in an N/a I pump 87 octane. I drive fast too.

 

Rx7nub how old is your o2 sensor? It would cause what you are experiencing.

 

HM! That must be it, it's from 1987! i guess.. how much O2 sensor's go for?

 

ugh, 30$? dunno heh

 

can i just pick one up from an auto parts store or what?

 

Id put in a OEM one from Mazda, but you can throw in a bosch or similar.

 

i c, anything upgraded I could use? So that an a/f guage would be more accurate?

 

Do NOT buy an OEM O2 sensor (they are like $50+). Pick up a Bosch universal from O'Reilly's, or the like, and drop it in. Mine was $18. In fact, Mazda probably uses Bosch.

 

Can anyone verify that these would work? using generic/cheap stuff makes me nervous knowing how finicky these cars can be

 

12mpg on a good day..
Dave

 

20-22 on highway, 15-16 in city

I guess I can't complain!

 

8miles per gal 15psi 93 oct 1.3 tII.If you buy cheap **** you get cheap ****.

 

18 as of late, damn high idle and warm-up.

 

sig couldnt hurt

 

Try using a four wire universal O2 sensor from bosch. It will be better than the factory and will make an air/fuel gauge more accurate than the single wire mazda

 

This stuff is not cheap, it is just that Mazda way overprices their stuff. The only time your car uses the O2 sensor is when you are driving at a constant speed where it goes into a mode where it uses the O2 sensor to maximize fuel economy. Under throttle applications, your car does not use the O2 sensor. In fact, you can drive around without an O2 sensor wiithout any problems (other than low gas mileage).

I was getting 15-17 mpg in my 5-spd vert before I changed the O2 sensor, but now I am up to 19 mpg. Also, my idle smoothed out a little more.

 

19 mpg city

 

about 18

 

over 20 hwy... dont ask city

 

i filled up to 3/4 of a tank and drove 205 miles and went down to half a tank...on the highway..and thats probably with about 3 downshifts to third messin with 87GTR...

 

9, i drive hard all the time, o2 sensor wire melted and broked off, and still driving like that

 

300 miles per fill-up. VERY consistant, but always a mix between driving hard and going speed limit...