Pickens in BP (BP) (OXY), While Touting (CHK) (DVN) (EOG)

T. Boone Pickens is investing in all angles of the energy play, holding shares of BP (NYSE:BP) and Occidental Petroleum (NYSE:OXY) while pushing the benefits of natural gas, where he holds companies like Chesapeake Energy (NYSE:CHK), Devon Energy (NYSE:DVN) and EOG Resources (NYSE:EOG).

He is also the largest shareholder in Clean Energy Fuels (NASDAQ:CLNE), which focuses on supplying natural gas for vehicles.

Pickens says, “We can get to 8 million 18-wheelers with natural gas in seven years, and that would cut our OPEC oil in half.”

Being very obvious in his pushing of energy in general, as he stands to gain whatever way and pace the market goes and grows, Pickens also said in a recent interview he sees oil rising to $300 a barrel in a decade if the U.S. doesn't change its energy consumption habits.

Whether you agree with Pickens or not, you do have to take things he says with a healthy grain of salt, as he has a huge stake in almost every outcome in the sector, a reason he's been out over the last couple of years being very vocal and available to the media.

Pickens Increases BP (NYSE:BP) Stake in Third Quarter

T. Boone Pickens, whose BP Capital Management hedge fund is heavy with energy investment, added to his position in BP Plc (NYSE:BP), and a number of other energy companies.

Others receiving additional investment were Noble (NYSE:NE), Devon Energy (NYSE:DVN), Chesapeake Energy (NYSE:CHK) and Weatherford International (NYSE:WFT).

He increased his stake in Apache (NYSE:APA) by over double, and in Schlumberger (NYSE:SLB) by over three times the number of shares held.

Pickens also sold energy shares, including Anadarko Petroleum (NYSE:APC) and Transocean (NYSE:RIG), which have connection to the BP Gulf of Mexico oil spill, along with Hess (NYSE:HES) and Suncor Energy (NYSE:SU).

Pickens said last week he sees oil prices reaching as high as $100 a barrel in 2011.

BP closed Tuesday at $41.79, losing $1.26, or 2.93 percent.