It sounds like more trouble than its worth. The savings are not that great when you compair getting hasseled by the government. I, myself don't awant to be on a IRS list, which this issue will surely do. Never beleive that there is no catch. there is always a catch. Diesel here at Chevron is down to $3. 09 a gallon with regular unleaded at $2. 95. Yes, its a rape but Im not going to set myself up to a regular visit from the feds! If you think Im wrong, wait. You will see. i know a few guys that got their tanks dipped a few years ago. ever since then, every so ofter he gets a visit from the local guy and gets dipped again. No reason at all. Im not going to put myself in that position!