Americans who want to find the best fuel to put in their vehicle might avoid visiting BPs around the country following the news that the company is recalling more than 2.1 gallons of contaminated gasoline that has caused problems in many driver's cars, limiting their performance.

Indiana's attorney general's office recently opened up an investigation into BP after drivers in the Northwest Indiana area complained about the quality of the gas they filled up their cars with in the last couple weeks.

The contaminated gasoline was blended at BP's storage terminals in Whiting, Indiana. Since being released, BP has received more than 7,000 customer complaints, according to a spokesman for the company.

"We are closely monitoring the response by BP and will be reviewing their claims and reimbursement processes," said Attorney General Greg Zoeller. "As the watchdog for Indiana consumers my office has a duty to ensure consumer's rights are protected and that there is no undue delay in appropriate reimbursements."

According to BP spokesman Scott Dean, the company will cooperate with investigators and begin adding staffers to the customer service lines to answer the high volume of calls that are being received. He added that since employing more workers to the phone lines, the company has seen a reduction in hold times.

The Times of Munster recently reported that people who were affected by the recall contacted BP this week to notify them of the problem and file a claim, but some were on hold for two hours or more because of the high volume of calls.

The oil company admitted that they are trying to help all of the customers who were affected by the contaminated gas, but having a receipt for the fuel would expedite the process. The gas was blended between August 13 and the 17th, and was discovered to have a higher level of polymeric residue than normal levels.

This is not the first time BP has been involved in controversy. The company was forced to create a $20 billion assistance fund for Americans who were affected by the oil spill that was a result of the damage caused. The first oil rig explosion killed 11 people and injured 17 others.