On the negative side, Cramer recommended waiting for a pullback before buying some of the names he's touted this week, mainly the wildcat drillers.

An Orphan Stock

Concluding his series on wildcat oil drillers, Cramer recommended RAM Energy (RAME Quote).

RAM Energy operates in Texas, Louisiana, Oklahoma and West Virginia, with 39 million barrels of proven reserves.

As with other wildcatters Cramer have recommended, RAM Energy is all about its exposure to oil shale fields and their potential. The company has already raised its production guidance and Cramer said Wall Street will love the company's growth.

Cramer cited the expiration of 18.8 million warrants, most with a $5 strike price, as one of the catalysts that will allow shares of RAM to begin edging higher. He also said RAM is what he calls an orphan stock, with only four analysts covering the company, none of which are from a major firm.

Cramer said the stock will rise once Wall Street starts taking notice of RAM.

Cramer said this $5 stock could go as high as $8, but he warned investors that this speculative name should be traded with caution. He advised investors to buy in small increments, not to use market orders, and certainly not to pay up for the stock. He urged investors to wait for a good entry point.

Speculation Friday

For this weekly segment, Cramer highlighted Sun Hydraulics (SNHY Quote) as another fluid dynamics stock that he said is on the rise. He credited BusinessWeek's "Hot Growth Stocks" list for first alerting him to the name.

Cramer said he's returning to the fluid dynamics group because they're making money. He credited Sun for simply making a better valve, something greatly needed in oil rigs and other industrial applications.

He said Sun also has great international exposure, with 50% of the company's sales overseas. Domestically, Sun now has a 17% market share of a billion-dollar market, with many new innovations to come.

On a valuation basis, Cramer said Sun is cheap. The stock trades at just 17.5 times its forward earnings with a 23.5% long-term growth rate. The company only has three analysts covering it, and Cramer said the balance sheet is clean, the company carries only a little debt and he feels this $38 stock has the potential to reach $48 a share.

"When is comes to the best valves, you want Sun Hydraulics," he said.

Second Thoughts

Recently, Cramer was stumped by two lightning round stocks: Linn Energy (LINE Quote) and Brigham Exploration (BEXP Quote). After doing the homework on both names, he followed up with his opinions.

Cramer called Linn Energy a pretty good stock. This conservative driller has a large dividend and is at the tail end of a turnaround, he said.

Because of its inconsistent results, he said he'd stay away from Brigham Exploration and wait for a pullback before he'd buyer of this name.

Lightning Round

Cramer was bearish on Barrick Gold (ABX Quote), Winnebago Industries (WGO Quote), Corn Products International (CPO Quote) and Starwood Hotels & Resorts (HOT Quote).

Want more Cramer? Check out Jim's rules and commandments for investing by clicking here.

For more of Cramer's insights during the Lightning Round, click here.