Ok here it is...i have a 96 v6 A4 camaro and i bought the car and everything has gone good...i used to get about 245 miles to a full tank of gas well suddenly i have been getting around 205 and i want to know if anybody may have a reason for this...my mods are in my sig but the headers arent on right now and i dont know what the reason is!! i put in a 160 thermostat about 3 months ago i was wondering if that could be a factor?? any suggestions will help thanks

 

Time for a tune up:
plugs, wires, pcv valve, fuel filter and so on.
I get 30-31 mpg on the highway

 

Well that is the same thing my dad thought was just a simple tune up...just recently i changed my plugs and wires...so basically all the other essentials...well thanks for the help any other suggestions will help... thanks for the reply

 

Honestly a simple tune up will work wonders.
Air filter and assorted fluids too

 

Maybe the O2 sensors are starting to go

 

I get 20....but that's mainly stop-and-go city city driving.

 

do O2 sensors start to go bad , or do they just stop functioning properly all of the sudden?

 

plugs, wires, pcv valve, fuel filter

i got all new except for the fuel filter.... i get 15-18 mpg!

 

for the 3.4L guys, I was getting 12 mpg city, and 17 mpg on the higway, I switched the 02s, and no I am back to about 20 in city 25ish on highway.

I have a little bit of a heavy foot though.


On a 96, its very possible its your o2 sensors, I wodl swap them, might evne notice a slight improvement in power.

 

where are the o2 sensors on my car?