How many years of oil does the USA have left?

How many years of oil does USA have left depends on reserves and consumption. US proven oil reserves are about 35 to 44 billion barrels, at current US production of about 12 to 13 million barrels per day or about 4.5 billion barrels per year, simple division gives about 8 to 10 years of proven reserves at current production rate if no new reserves added. However, this is misleading because proven reserves grow with new discoveries and technology, and US technically recoverable resources including shale, tight oil, and offshore are much larger, estimated by USGS at 100 to 200 billion barrels or more, which would extend to 20 to 40 years at current production. US also imports oil, so consumption is about 20 million barrels per day, so domestic reserves alone would last less if it had to be self-sufficient. Including all recoverable resources and assuming reduced demand from electric vehicles, US could have decades of oil left. So proven reserves suggest about 8 to 11 years at current production, but with probable and possible resources, US has 30 to 50 years or more, though production may peak and decline before running out completely, becoming more expensive.