Based on the aggregated intelligence of 130,000-plus investors participating in Motley Fool CAPS, the Fool's free investing community, alternative-fuel provider Clean Energy Fuels (NASDAQ:CLNE), which provides natural gas as vehicle fuel, has earned a coveted five-star ranking.

With that in mind, let's take a closer look at Clean Energy's business and see what CAPS investors are saying about the stock right now.

Clean Energy facts

Headquarters (founded)

Seal Beach, Calif. (2001)

Market Cap

$445.11 million

Industry

Oil and Gas Refining and Marketing

Trailing-12-Month Revenue

$129.8 million

Management

Co-Founder/CEO Andrew Littlefair

CFO Richard Wheeler

Compound Annual Revenue Growth (over last three years)

15.8%

Competitors

Exterran Holdings (NYSE:EXH)

Exxon Mobil (NYSE:XOM)

CAPS members bullish on CLNE also bullish on

Chesapeake Energy (NYSE:CHK)

General Electric (NYSE:GE)

CAPS members bearish on CLNE also bearish on

Citigroup (NYSE:C)

Starbucks (NASDAQ:SBUX)

Sources: Capital IQ, a division of Standard & Poor's, and Motley Fool CAPS.

Over on CAPS, fully 805 of the 830 members who have rated Clean Energy -- some 97% -- believe the stock will outperform the S&P 500 going forward. These bulls include All-Stars cwkraj and Seansonfire.

In March, cwkraj tapped Clean Energy as a natural, billionaire-backed selection:

Natural gas is Americas most abundant, natural fuel. [T. Boone Pickens] is pushing the heck out of it … AT&T just switched 8,000 cars to natural gas. It seems like [Clean Energy] signs or re-signs a new contract at least once a month. What's not to like, besides current oil prices but guess what they will rise again too!

In a more recent pitch from last week, Seansonfire also keeps it clean:

[Clean Energy] is the future of energy in our country. It is a spectacular oil play as it is an oil supplement, as well as the prices of natural gas trade along side oil. As I am bullish on oil going into the summer … this is a great pick up.

Reasons I like it:

1) California is already adopting this technology as an alternative source of fuel to gas. (Many other environmentally responsible states will do this in the future.)

2) Growth potential is enormous

3) Obama wants to move our energy infrastructure away from oil, and [compressed natural gas / liquefied natural gas] is the natural next best choice.

What do you think about Clean Energy, or any other stock for that matter? Make your voice heard on Motley Fool CAPS today. More than 130,000 investors are waiting to hear what you have to say. CAPS is 100% free, so simply click here to get started.

Fool contributor Brian Pacampara owns no position in any of the companies mentioned. Chesapeake and Starbucks are Motley Fool Inside Value picks. Starbucks is also a Stock Advisor selection, and the Fool owns shares of it. The Fool's disclosure policy always gets a perfect score.