Hydraulic fracturing is saving motorists money at the gasoline pump.

That method of getting to oil trapped in shales, commonly called fracking, shaved up to 94 cents a gallon from fuel prices in 2013, according to a report the national trade group American Petroleum Institute has released.

Innovations in horizontal drilling and hydraulic fracturing are responsible for about 48 percent of U.S. oil production today, up from 11 percent in 2008, said the study by ICF International.

“For the first time in generations, surging domestic production is driving our energy security and creating large benefits for consumers,” API vice president for regulatory and economic policy Kyle Isakower said in a statement. “Over the last five years, nearly every barrel of new U.S. production can be attributed to the use of horizontal drilling and hydraulic fracturing technologies, and that production is reshaping global markets in a way that is strengthening the U.S. both economically and diplomatically.”

Without the technologies, ICF estimated that international crude oil prices per barrel would have averaged $122 to $150 in 2013 — an increase of $12 to $40. The corresponding discount on gasoline and other refined products was 29 cents to 94 cents per gallon.

In total, U.S. consumers saved an estimated $63 billion to $248 billion in 2013. From 2008 to 2013, the cumulative savings for U.S. consumers ranged from $165 billion to $624 billion, the study concluded.

An earlier study by IHS estimated that the average U.S. household saved about $1,200 in 2012 from unconventional production of both oil and natural gas, a cumulative national savings of about $163 billion.