EDMOND, Okla -- Most people cringe. David Bryan chuckles every time he passes a pump.
He hasn't filled up his gas-guzzling pick up or SUV in months.
Bryan said, "I never feel concerned. I drive right by the pumps. You feel isolated from what happens overseas with the market and all that energy crisis stuff."
David recently converted his vehicles to compressed natural gas.
It's much cleaner and less expensive; he saves $600 a month on fuel costs.
The biggest obstacle to natural gas is limited fueling stations but that's not even an issue for Bryan.
He tapped into the gas line already piped into his home.
He hooks up the hose at night and is ready to roll the next morning.
Bryan said, "I walk in, go to sleep and forget about it. It's like charging your cell phone."
Craig Wright left Utah about a year ago and moved here to Oklahoma, the natural gas capitol of the world.
His company, CNG Interstate, has already converted more than 200 vehicles.
Wright told us, "It's just a great atmopshere, a great state to do business in. Oklahoma will be the hood ornament for the nation in what natural gas represents for the transportation industry."
Converting to compressed natural gas costs roughly $10,0000.
And it's an additional expense to install a personal fueling station.
But folks like Bryan, who have made the investment, say it pays for itself in less than a year.
His only regret? He wishes he'd done it sooner.
"It's unbelievable. Life changing," he said.