http://www.harborfreight.com/cpi/cta...emnumber=36098
"FuelMaster
Simply strap to your fuel line to save gas and increase engine efficiency. FuelMaster's magnetic field breaks up clusters of hydrocarbon for more complete burning.
Prevents build-up of dirt in engine injectors. Gives you 11.6% average highway fuel savings as tested by an EPA accepted laboratory.
Use it on four cylinder cars and trucks."
go to harbor freight and get one, see how it works.