If our cars hold 18.5 gallons of gas and consume an estimated 19 mpg City... Why did my car even barely reach 210 miles on a full tank of gas?

18.5 x 19 = 351.5 miles

Whats gives?

 

i dunno why but i figured out i got 16.5 gallons... i had my light on completly for like 20 miles... and filled up.. it 16.26 gallons..And i filled when i had exactly half a tank and it was 8.25 gallons then.. So you have 16.5. And u should try and get a new fuel filter ($6), air filter($15 for a cheap one) and plugs($15-20 at the most) (and all that isn't performance). I did that and my mpg went from about 14 to 18.5.. still need to get some injectors.

 

I don't know where you live or how you drive (city/hwy), but your O2 sensor might need replacement. I can usually get 25 MPG mixed city/hwy driving in Seattle. High 20's, even 30 MPG is doable if it's mostly highway.

 

My mileage sounds like what Tom is getting, close to 30MPG.
Not sure how they get such decent MPG out of such a big
car, but they got something right.

I'd say, bad injectors (check the resistance across the leads,
they should be around 11 ohms I think...my MPG when to s**t
when my injectors started crapping out), bad plugs, or bad O2
sensor.

 

just thought I'd share this--->
after talking with my firend at emmission, I found out that my gas cap was faulty(being since it failed the gas cap test), he informed me that bad MPG is a result of this....So today I got my new gas cap from Nissan, immediately I could tell the difference as I screwed it in, the seal was WAAAAAAAAY tighter than my old cap, next I took the car for a spin(about 20+ miles), with a 1/4th tank of gas, WOT'd it most of the way and did some regular stop and go traffic in the city with "P" mode on....now usually after a "brisk" drive like this, my fuel gauge would be down to the 1/8th point or less when I got home, but surpirisingly it was still holding strong and actually rose a little above the 1/4th point. tommorow I'm gonna run it down to "E", fill it up again and hopefully get out of the 220-240 MPG range and into the 300s again...just thought I'd share, I always thought, bad MPG automatically = bad injectors, but $16 I'm hoping the gas cap was the culprit!!