Benefits
Marathon® gasolines with STP® Additives


STP Provides extra cleaning powerProvides extra cleaning power

Marathon gasolines with STP Additives deliver more than double the minimum EPA required dose of detergent additives.

Dirty Intake Valve Clean intake ValveHelps prevent deposit buildup

Deposit buildup can adversely affect engine performance and vehicle driveability. Compared to gasolines using only the minimum EPA required dose of detergent additives, Marathon gasolines with STP Additives are designed to help prevent the accumulation of performance-robbing intake valve deposits.

Maintain Vehicle PerformanceHelps maintain vehicle performance

With the advent of more sophisticated electronic engine controls, the presence of intake valve deposits can result in poor vehicle performance. Heavy deposits on an engine's intake valves can cause momentary disruptions in fuel delivery when starting a cold engine, resulting in hesitation or stumble. In addition, intake valve deposits have been shown to disrupt the flow of the air/fuel mixture. This often leads to poor performance. Marathon gasolines with STP Additives help keep engine intake valves clean, and help maintain vehicle performance compared to lower detergent gasolines.

Maintain Fuel EconomyHelps maintain fuel economy

Even with today's sophisticated electronic engine and emission control systems, studies show heavy deposits on an engine's intake valves can cause fuel to be burned incompletely and less efficiently. This can lead to poor fuel economy. As stated by the U.S. EPA, "deposits in gasoline engines and fuel supply systems can increase harmful exhaust emissions and adversely affect vehicle fuel economy and driveability."1Marathon gasolines with STP Additives help keep intake valves clean which can lead to better fuel economy than gasolines with lower levels of detergent additives.

Control Vehicle EmissionsHelps control vehicle emissions

As stated by the U.S. EPA, "the effective control of deposits in gasoline engines and fuel supply systems has been shown to reduce the emission of nitrogen oxides, hydrocarbons, and carbon monoxide in engine exhaust, while enhancing fuel economy." 1Marathon gasolines with STP Additives help keep intake valves clean which can help lower harmful emissions.

1In accordance with the U.S. Clean Air Act, section 211(1), United States Environmental Protection Agency, 40 CFR Part 80, Final Rule - Regulation of Fuels and Fuel Additives: Certification Standards for Deposit Control Gasoline Additives

Updated: Monday, August 6 2012