I am getting low gas milege. With a full tank I get tops 325 miles and I use premium. Any suggestions any solutions and I am getting code 0303. It's a 97 Max SE 5 speed.

 

0303 is front left heated O2 sensor. Start there. The left o2 sensor is the one closest to the radiator and you can pick the sensor up at autozone for about 79$
Hope that helps

 

Your bad front O2 sensor is causing your low MPG. Group deal: http://forums.maxima.org/showthread.php?t=289189

 

Wow I would kill for that gas mileage... I"m getting about 200 per tank.

Change the 02's.. if I were you I'd change both the front and back.. They're very easy to change.

 

wtf, u lucky s.o.b. i also only get 200 per tank, and have done lots to try to increase it. by lots i mean - new motor, new o2 sensors, knock sensor, and theres lots more. So what im trying to say is - be happy with it

 

you are nto satisfied wiht 325 ur lucky i get only 275 wiht out hard driving

 

dude i get 340 and i dont beat on it at all... be happy thats what these cars get man

 

i get 330 with about 2 gallons remaining. Also getting knock and o2 code. I thought i was getting bad mileage and I run mine pretty hard.

 

wow, i have a bad knock and o2 and i get about 365. BTW, I never had a good KS on this car. Anyone know about how much that affects the performance?

 

I'm not sure from your post what kind of driving you are doing.

On a long trip at steady speeds, my car can get about 28 mpg. That gives a range of around 450 miles per tank without dipping very far into the reserves.

If you mix in stop-and-go or city driving, naturally the fuel economy will suffer. 20-23 mpg is about what I get.

Computing and comparing fuel economy by miles per tank is not very accurate. Better to measure by filling the tank, and noting miles traveled since the last fill-up. Repeat 4 or more times to get a good average. Divide total miles travelled by total gallons used to get mpg.