Fuels & Chemicals

Eco-friendly High Octane Gasoline

ENEOS Eco-friendly High Octane Gasoline

ENEOS premium gasoline is an eco-friendly, high octane gasoline that offers outstanding detergency and is sulfur-free*1 (sulfur content: less than 10 ppm).
Our premium gasoline is formulated with detergents to help keep engines clean. Regular fill-ups with ENEOS High Octane Gasoline will keep intake valves much freer of deposits than with regular gasoline. Your car will accelerate better and also produce lower levels of harmful emissions, which benefits the environment.

  1. *1Definition of "sulfur-free"
    Fuels are considered sulfur-free if they have a sulfur content of 10 ppm (parts per million) or less. The early adoption of new automotive technologies and the elimination of sulfur from fuels are steps that must be taken if we are to further reduce harmful emissions, CO2 included, on the way to realizing zero-emission vehicles.

Outstanding detergency

What does it mean for an engine?

Fig. 1 - Engine detergency

A gasoline with good detergency helps keep deposits from forming on the intake valves and other components of the engine's intake system. Gasoline can get stuck on intake valves with heavy deposits, which can lead to combustion problems. Preventing these deposits from forming helps the engine continue to perform as it should. (Fig. 1)

ENEOS High Octane Gasoline keeps engines clean

Controlling deposits on intake valves (Fig. 2)

In a test we developed to evaluate a fuel's ability to keep intake valves clean*2, our high octane gasoline was much better at controlling deposits than a regular gasoline.

  1. *2Intake valve deposits are checked after running the engine for 100 hours (comparable to driving approximately 5000 km)
Fig. 2 - ENEOS High Octane Gasoline's effect at controlling intake valve deposits

The Sulfur-free Promise

A proactive approach to sulfur content regulations

Driven by a need for more eco-friendly automotive fuels, countries around the world have enacted laws restricting the sulfur content of gasoline (Table 1). Laws went into effect limiting sulfur content to 10 ppm in Japan in 2008 and the EU in 2009, marking the arrival of what is recognized as sulfur-free gasoline.
We were ahead of the curve where these laws were concerned. In fact, ENEOS high octane gasoline has met the definition of sulfur-free since 2002.

Table 1 - Restrictions on sulfur content of gasoline in Japan, the U.S., and Europe

Year 2000-2003 2004 2005 2006, 2007 2008 2009 2010-2012 2013-2020
Japan 100 ppm or less 50 ppm or less 10 ppm or less
USA Federal 1000 ppm or less 30 ppm or less 10 ppm or less by 2020
California 30 ppm or less 15 ppm or less
EU 150 ppm or less 50 ppm or less 10 ppm or less