I am thinking of converting my hummer to gas its a great fun beast but guzzles fuel relentlessly any one tried a conversion.

 

I am in the middle of one right now (I am assuming you mean Compressed Natural Gas) called the Green HUMMER Project. Ours is a military self help project - the project vehicle is one of our PA/recruiting H2s. Go to www.cng-ohio.com / they are one of our sponsors. We are also on Facebook - do a search for Green HUMMER Project.