I would agree with this for sure, I am fine with the miles I get, Today it is at 32.2 so it keeps dropping by 1/10th with the same tank.. I will just wait and see what happens

 

LOL you do realize there are so many other things that effects what you are experencing..... like the a big one having t do with how long you idle before you drive and also the ambient temperature's oh and IAT that all effect the Warm Up Catalyst that can directly influence that amount of MPG change.
Honestly for the effort reporting this and the fact that you have used so many different fuel companies as well that your engine is not even broken in yet this question is sort of funny? Come back after you get 15k miles or more and durning the summer and lets talk about your data showing reduction in MPG?

 

Honestly my behavior does not change much from week to week but the temps sure do change. If I have this car at 15,000 miles I will let you know how it pans out in the end.

Again I am not concerned about the actual miles, I have never had a car that went down by 1/10th every week- it is more of a wondering kind of thing

Thanks to all who took the time to reply- I do appreciate the knowledge.

 

Well unless you are watching the current active MPG and tailoring your driving habits around it then ya they humanly do change from day to day and week to week.
And this also goes without saying the any vechlce pre 200 or some from 1995 and newer, with OBDII and CANbus how would you actually claim not seeing a 1/10 drop in small amount in a short period of time. That is without monitor gauges like a instant MPG and a vacuum gauge minimum?

Even GM had thes in dome factory equip car back in the . I still have my vacuum gauge that came stock on the center console in my 1966 Buick LaSabre 2 door coupe. LOL
Here is one in a 60's Pontiac GTO.

 

Currently I use a Ultra Gauge to monitor not only my "driving habits" pertaining directly to MPG but vital engine monitors and sensors.

 

OK I really think the gauge in the Pontiac is way cool ! I do not have that kind of interesting things to work with but I sure have learned alot on this thread.

 

It was fun on my 1965 Corvair Corsa with the turbo to watch the vacuum gauge move from negative to positive pressure.

 

They had some cool cars back then !

 

I owned many cool cars back then and into the early 80's. After that it was hard to find anything interesting.

 

Even most of the 4x4's became garbage around that time.