Well, if you buy it straight off the shelf and dump it into your tank, I don't think it's cost effective,,,,,,
How ever if you get it free from the restaurants after they have used it for their fryer, then it's EXTREMELY cost efficient.....
Buying a kit, or building your own.... either way I know a guy who runs it, and has had no issues yet.....(Well, he did have a fuel pump issue I guess,,,,)
