3966-1. SpecificationsnGasoline quality standardslAutomotive manufacturers in the US, Europe and Japan have developed aspecification for fuel quality called World-Wide Fuel Charter (WWFC) that isexpected to be applied worldwide.lThe WWFC consists of four categories that are based on required emissionlevels. In the US, category 4 has been adopted.lThe WWFC improves air quality by lowering emissions in vehicle fleets, andcustomer satisfaction through better performance.nLexus recommends the use of gasoline containing detergent additiveslLexus recommends the use of gasoline that contains detergent additives toavoid build-up of engine deposits.lAll gasoline sold in the US contains de tergent additives to clean and/or keepclean intake systems.nLexus recommends the use of cleaner burning gasolineCleaner burning gasoline, including reform ulated gasoline that contains oxygen-ates such as ethanol or MTBE (Methyl Tertiary Butyl Ether) is available in manyareas.Lexus recommends the use of cleaner burning gasoline and appropriately blendedreformulated gasoline. These types of gasoline provide excellent vehicle perfor-mance, reduce vehicle emissions and improve air quality.nLexus does not recommend blended gasolinelLexus allows the use of oxygenate blended gasoline where the oxygenate con-tent is up to 10% ethanol or 15% MTBE.lIf you use gasohol in your Lexus, be sure that it has an octane rating no lowerthan 87.lLexus DOES NOT recommend the use of gasoline containing methanol.nLexus does not recommend gasoline containing MMTSome gasoline contains octane enhancin g additive called MMT (Methylcy clopen-tadienyl Manganese Tricarbonyl).Lexus DOES NOT recommend the use of gasoline that contains MMT. If fuel con-taining MMT is used, your emission control system may be adversely affected.The malfunction indicator lamp on the inst rument cluster may come on. If this hap-pens, contact your Lexus dealer for service.
