2004 I35 - MPG issue or trip computer problem.

[Philboy38]

Hey Guys,

So I've had my car for just over 2 years now. During this time, I have been showing between 23.8 and 24.5 MPG (with a 33 MPH) reading on the trip computer. About 6 weeks ago, I had some work done:

1. Replace battery
2. Discharge and recharge of A/C
3. Replacement/repair of power steering hoses/system (it was leaking)

Since this time, the MPG showing on the trip computer has been between 19.5 and 20.8 (with an MPH reading of 27). I've even reset it and it seems to settle back to this same range. I know it's 115 degrees lately in AZ, but this is the third summer I've had it. Could one of the issues mentioned above be contributing to the MPG problem, or is the trip computer just messed up now? Has anyone else experienced this, or does anyone have any ideas/suggestions? As always, any input is greatly appreciated.