"Still the best Water Fuel Kit in 2009...?"
By far the easiest-to-follow guide we came across: Our own experience says you should set aside maybe half a day to buy the parts and get fully installed.
This is the only guide that assumes absolutely no knowledge of cars. Impressively, our support ticket was responded to in under an hour (although it could take a little longer at weekends), and there is an unconditional 8-week money-back-guarantee.
Best of all, the technology required is readily available and cheap - we were able to access all the parts needed for well under $50. Given that it is proven to increase fuel efficiency by as much as 47%, you could well recoup your investment in under a week.
Installation works with any gas or diesel powered car, van, truck or SUV. Aimed squarely at car "novices", and still our top pick for 2009.
August 2009 Update:
There is now a promotion running on the site, and it is temporarily available for $49.97 instead of $149 - as such, we recommend ordering sooner rather than later.
The Verdict:
Fast and easy setup; works for complete car novices; proven fuel savings of up to 47%: