ECU Flash affects MPG?

 

There's a growing rumor that the last Engine Control Unit program update
has caused the engine to operate more frequently, thus lowering the
miles per gallon.  I thought I had lost some miles per gallon to the hot
weather until I heard this.  Anyone have any support for this?

Note to Toyota, I bought this vehicle because it looked like a good
technological compromise to achieve higher mileage.  You've released the
Hybrid Highlander, the GX400h, and the Hybrid Camry with minuscule
improvements in the mpg versus their gasoline only counterparts.  I
think you're missing a significant market if this rumor is true and you
continue releasing vehicles with only minor mileage improvements.

 



Not sure where you are getting your infomation, but both our cars are fully
updated and they are doing equal or better than the last time they were
serviced. The older of the 2 averaged 58+ mpg on a trip from MA to NC and
back.

Second, it's not only about the MPG's but about greatly reduced emissions
from the hybrid synergy drive as well that makes the hybrid version a
'better' car than the gas-only version.

 



I didn't see any change in my fuel economy.


I call them feel-good-hybrids.  They are essentially meaningless as far as
conservation is concerned.  I heard GM as some truly phony hybrids.

 

...

Where did you hear that rumor?!

 

Carpe Diem wrote:

 From another owner who had his service performed about the same time I
did and also had his mpg drop noticeably.  That's why I came here, to
see if it was only a small sample or a more widespread occurrence.