As defined by the U.S. Geological Survey (USGS), heavy oil is a type of crude oil characterized by ... the upper limit for heavy oil is 22° API gravity with a viscosity of 100 cp (centipoise).

Investing.com -- U.S. crude oil futures climbed slightly from post ... compared with a build of 3.3M barrels reported by the API for the previous week. Economists were expecting a build of 2.3M ...

Investing.com -- U.S. crude oil futures dipped slightly in post-settlement ... compared with a build of 5.025M barrels reported by the API for the previous week. Economists were expecting a ...

Investing.com -- U.S. crude oil futures inched higher in post-settlement ... compared with a draw of 1.4M barrels reported by the API for the previous week. Economists were expecting a draw ...