Every day, the sun rises on Wall Street, and a plethora of professional analysts wake to issue new opinions on stocks. Here at the Fool, we use our "This Just In" column to examine some of these picks -- and the track records of the firm behind them -- to help individuals can make better investing decisions.

In addition to following professional banks, anyone can use Motley Fool CAPS to monitor the collective opinions of more than 130,000 members, many of whom demonstrate better investing insight than published analysts do.

Enough top-performing CAPS members have turned bullish on Tesoro (NYSE:TSO) recently to upgrade it from the three-star rank it's held for months to a more formidable four stars. A total of 965 members have given their opinion on Tesoro, with many offering analysis and commentary to explain their recent optimism.

Lower crude oil prices battered earnings at oil companies such as ExxonMobil (NYSE:XOM) and ConocoPhillips (NYSE:COP) in the first quarter. But refiners such as Tesoro, Valero (NYSE:VLO), Western Refining (NYSE:WNR), and Sunoco enjoyed higher gasoline crack spreads.

For its part, Tesoro earned $51 million on fatter margins, compared to an $82 million loss last year. The company eliminated its borrowings on its revolving credit facility, and like rival Frontier Oil (NYSE:FTO), improved its cash position to $156 million. Tesoro has roughly $1 billion available in its credit facility, giving it plenty of flexibility in an uncertain economy.

Tesoro still sees challenges ahead because of lower demand for motor fuels. The company plans to run its Hawaii refinery and others at less than full capacity this quarter, and Chevron (NYSE:CVX) is also considering stopping production at its refinery in Honolulu. But Tesoro said that lower pump prices year over year have been stimulating more discretionary driving, which could help shore up the slide in demand.

To see what the very best CAPS analysts are saying now about Tesoro -- and discover the other winning stocks they are picking -- head on over to CAPS and have a look. Unlike analysts' opinions, which are usually reserved for paying clients, the community research and resources in CAPS are totally free.                     

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Fool contributor Dave Mock recently upgraded his hubcap collection with a few vintage jewels from the junkyard. He owns no shares of Exxon Mobil. Yes, the Fool's disclosure policy  did take underwater basket weaving in college, and aced the class.