Rob wrote:
> Are you still using the same fuel or does it now contain ethanol?
Unless the fuel contains a huge amount of ethanol, it's not going to
make a substantial difference. When fuels around here switched from MTBE
to 10% ethanol, the difference in mileage in my Elantra was essentially
imperceptible, amounting to all of .5 mpg, if that.
More than likely, since these are older cars, it's a combination of wear
factors like slight loss of compression, carboning of the engine and
exhaust system, etc. That's assuming that they are still being driven
the same way, as that's by far the most important factor in fuel economy.
>> Stay informed about: Poor MPG