Investors can also gain exposure to Brent crude oil futures with the United States Brent Oil Fund (NYSEArca: BNO). Brent crude, while also a type of sweet, light crude oil, contains less sulfur than its WTI counterpart, and this crude oil primarily comes out of the North Seas. BNO has a 0.75% expense ratio.

Additionally, ETF investors can choose from the oil related products, such as gasoline, natural gas and heating oil.

The United States Gasoline Fund (NYSEArca: UGA) tracks the futures prices on unleaded gasoline. UGA has a 0.60% expense ratio. [Gasoline ETF at Four-Year High as California Prices Spike]

The United States Heating Oil Fund (NYSEArca: UHN) follows the daily changes in the spot price of heating oil. UHN has a 0.60% expense ratio.

For more information on crude oil products, visit our energy category.

Max Chen contributed to this article.