For those looking to find strong Oils-Energy stocks, it is prudent to search for companies in the group that are outperforming their peers. Is DCP Midstream Partners, LP (DCP - Free Report) one of those stocks right now? Let's take a closer look at the stock's year-to-date performance to find out.DCP Midstream Partners, LP is a member of our Oils-Energy group, which includes 247 different companies and currently sits at #4 in the Zacks Sector Rank. The Zacks Sector Rank considers 16 different sector groups. This system has a long record of success, and these stocks tend to be on track to beat the market over the next one to three months. DCP Midstream Partners, LP is currently sporting a Zacks Rank of #1 (Strong Buy).Over the past 90 days, the Zacks Consensus Estimate for DCP's full-year earnings has moved 23% higher. Meanwhile, stocks in the Oils-Energy group have gained about 33% on average. This means that DCP Midstream Partners, LP is performing better than its sector in terms of year-to-date returns.Murphy USA (MUSA - Free Report) is another Oils-Energy stock that has outperformed the sector so far this year. The stock currently has a Zacks Rank #2 (Buy).Looking more specifically, DCP Midstream Partners, LP belongs to the Oil and Gas - Production and Pipelines industry, a group that includes 13 individual stocks and currently sits at #59 in the Zacks Industry Rank. On average, this group has gained an average of 16.5% so far this year, meaning that DCP is performing better in terms of year-to-date returns.In contrast, Murphy USA falls under the Oil and Gas - Refining and Marketing industry. Since the beginning of the year, the industry has moved +46.8%.Investors with an interest in Oils-Energy stocks should continue to track DCP Midstream Partners, LP and Murphy USA. These stocks will be looking to continue their solid performance.