No since I hadnt a check engine light

 

The OBC provides both an overall since last re-set average, and a current fuel mpg...
after resetting the overall average, it will take a few tanks of gas to stabilize the avg MPG...simply put, drive just a few miles, and the averages can be overly weighted toward city or highway driving...
refilling your fuel tank when you have only 40 miles till empty is pretty bad.....that ,means there is usually about 2 gallons of fuel to cool the pump...I would suggest trying to refill a bit sooner...maybe a 1/4 tank...simple thing to improve reliability and save you a few $$.
if your fuel gauge is going kinda screwy, it all makes sense....heck park on a hill...and the mpg till empty will be off when you start...
so just figure out your mpg by the old way...reset the odometer on a fill up...drive till you refill...then divide. I suspect you are fine and just getting a OCD....then again, the local meth-head might be stealing your fuel at night.....

 

look at other things than just the engine when MPG comes into play. did you just get new tires? if so what kind, they can have a big affect on MPG. but the biggest item i see is a bad alignment. that will affect the MPG a lot. it looks like you have have checked a lot of the normal things, look out side the box now.

Chad
Detroit Tuned

 

Well I had an alignment in early nov, and I swapped my good tires in the front.. The balance may be off but I doubt that will increases consumption

 

did the bad MPG and the alignment happen about the same time? i have found that not to many people know what they are doing....

 

Hmmm yes but I thought it was from the long commute i was making that week

 

Ok so over a full tank of fuel on cruise control I traveled 433 miles with like 59 left on the range which equates to about 35 mpg... The fuel consumption still doesn't feel right...

 

If you're getting 35 MPG, even on cruise control, then you're obviously not having any fuel consumption problems at steady-speed, low boost/high vacuum conditions. That's actually pretty awesome for a first-gen with a reduction pulley.

Are you still having the problems around town where you're getting closer to 5 MPG?

 

Yes but it feels more like an overall factor.. The counter says 35 mpg, although the range will continue to drop by 4-5 miles every minute regardless of what speed I'm at

 

Sounds like it is fine...just don't get so OCD over the instant/average mpg on the computer....it varies!!. ONLY check it when you refil the tank, then divide by miles driven....

 

im thinking winter gas. I have been getting bad mileage in both my mini and my corolla. i just chalked it up to the changeover.

 

Lol ok I guess I do get a little over the top when it comes to economy but it seems fine... Still gonna replace that air filter though.. Thanks for the tips!

 

I'm lucky to get 330 miles on a full tank