I do not know if this is needed to know but I found that the stop and go driving that I am forced to do on my way to work was making my mileage no where near what I felt it should be

So I did this...
I took my car on the interstate for 10 or less miles and drove it at the speed limit. I saw the gas mileage go up to 41.6, and on the way back from the drive it went up again to 42.8. Well all this week driving to work it has remained at 42 mpg. I think that driving this car on the interstate just once a week will maintain the 42, but we shall see.
Does anyone else drive Stop and Go. My work is 5 miles total a day (back and forth) I take side roads and stay under 35 most of the time, but still have to stop at 3 stop lights and 2 stop signs. I have learned my car though, and can keep it at a nice pulse and try to not go over 2,000 on the RPM's.
What other tips does everyone have? I want to find someone that has a short, very short commute and all city to compare.
I plan to keep a log. Oh, and I do notice one thing, I traded a 06 hybrid civic and miss how big the tank was...this one seems even tho I am getting better mileage, the tank goes quicker due to it being smaller

But over all I love my car....!