Here is some additional info with an article to follow as soon as I get it.

....
 In our experience we have not seen any loss of fuel consumption, however our
 customers have noted in many cases, better fuel consumption, but as you know
it
 always depends on how you drive and of course road conditions, either city
of country driving etc etc. Once again too many variables.

 We have an article from one of our customers, who wrote to one of the Australian Volkswagen magazines a few years ago praising the component.

 We will endeavor to retype or scan the message on an email to you ASAP.
Great
 work getting 7 buyers.

 Dave VVDS....

I will pass on the article as soon as I get it.

Robert