There was a big special on one of the pbs stations on this myth a few years
back.  The car companies (not oil companies) did buy up quite a few that
showed that they werent frauds or snake oil.  That was very few of them in
total.  Chrysler and ford both said they purchased over a dozen each for the
ownership and tested many others to verify that they were fake, or dangerous
to the vehicle.  Some of the ones they bought lead to design of newer
carburators and more efficient injectors systems.  Others were not
"commercially" viable.  What that meant was that in order for the system to
work correctly it had to be individually tuned to each vehicle.  Chevy said
they buy a couple of designs a year that they see on the web and hear of to
test out on vehicles.  Most were pure fake, and others have their claims
stretched way beyond reallity.  When asked what would be a guide on buying a
fuel saver device,  they all said if it was real they would be selling it.

My way was to put in a 90s subaru engine.  Far superior fuel management to
the original 80s technology in my original air cooled engine.
13/17 (14) mpg (air cooled) to 18/20 (19) mpg (subie actual in my vanagon)
857 gal/12k miles to 631 gal/12k miles for almost a 220 gallon per year
difference.  In my case I have already paid for most of my engine cost with
gas savings in the 3 years I have been running the newer engine.

Jimt

On 9/8/05 2:09 PM, "John Rodgers" <inua@CHARTER.NET> wrote:

>>> All the devices that work have been bought up by the
>>> oil companies so we won't get the mileage.
>>
>>