HOUSTON, March 5, 2012 /PRNewswire/ -- Shell, the no. 1 selling brand of gasoline in the U.S., is launching its NEW Shell Nitrogen Enriched Gasolines today to address the increasing need for engine protection. With advanced engine technologies coming to the market and with consumers holding on to their existing vehicles longer, it is becoming increasingly important for consumers to protect their vehicles, which is typically their second largest investment. (Photo: http://photos.prnewswire.com/prnh/20120305/DA63965) Carbon deposit build-up or "gunk" on critical engine parts is the result of various chemical processes that occur in the engine during its normal operation. The engine gunk can make your engine less efficient over time by acting like a sponge absorbing and trapping gasoline on intake valves, and impairing the flow of gasoline through fuel injectors. The new formulation from Shell delivers 20 percent more active cleaning agents than before, designed to protect the engine's intake valves and fuel injectors from performance-robbing gunk. So no matter what you drive, no other gasoline protects your engine better than the NEW Shell Nitrogen Enriched Gasolines. New patented cleaning agent addresses newer engine technologiesAccording to industry forecasts, new vehicle production with advanced engine technologies will show sizable increases in the coming years. In fact, in the next four years, J.D. Power and Associates forecast the number of vehicles with direct injection engines to more than triple from the 10 percent reported in 2010(1), while IHS Automotive predicts that one fifth of all North American-produced engines will be turbocharged or supercharged in the next two years.(1) These newer engine technologies are generally more sensitive to the build-up of gunk, which can negatively impact the engine's performance even more than in conventional engines. And, newer engine technologies can be subject to greater heat and pressure, which can cause cleaning agents found in lower quality gasolines to break-down and reduce their effectiveness. The NEW Shell Nitrogen Enriched Cleaning System is designed to maintain thermal stability and work under extremely hot engine temperatures, actively protecting the engine against performance-robbing gunk.