Hybrid Car – More Fun with Less Gas

ECU Flash affects MPG?

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Posted by NeoPhyte_Rep on August 23, 2006, 8:55 pm

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.

Posted by Russ G on August 23, 2006, 9:28 pm

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

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.

Posted by Bill on August 23, 2006, 10:33 pm

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.

Posted by Carpe Diem on August 24, 2006, 5:28 am


Where did you hear that rumor?!

Posted by NeoPhyte_Rep on August 24, 2006, 1:40 pm

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.

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