New tires = worse MPG?

[Patman]

Sure thing... I think I was agreeing with the idea that once you have a baseline for real-world fuel economy vs computer reported, it seems to be fairly consistent. I can take the reported MPG and have a decent idea of the actual fuel economy. The most accurate I've seen was 1 MPG optimistic, but that is fairly uncommon.

That’s what my Honda is like actually. It will say 50 on the display and then hand calculate out to 49.

 

[Patman]

With our Toyota hybrid, all it takes to kill the mileage is a bunch of short trips with the heater blasting which makes the computer keep the engine running a lot more.

She did just tell me that she has been running the heat a lot this week although she hasn’t really been doing short trips though