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6-1. Specifications
■ Gasoline quality standards
● Automotive manufacturers in the U.S.A., Europe and Japan have devel-
oped a specification for fuel quality called the World-Wide Fuel Charter
(WWFC), which is expected to be applied worldwide.
● The WWFC consists of four categories that are based on required emis-
sion levels. In the U.S., category 4 has been adopted.
● The WWFC improves air quality by lowering emissions in vehicle fleets,
and improves customer satisfaction through better performance.
■ Recommendation of the use of gasoline containing detergent additives
● To y ota r e com m e nd s t he u s e o f g aso l i ne t ha t c ontai n s de t er g e nt a d di t i ves
to avoid the build-up of engine deposits.
● All gasoline sold in the U.S.A. contains detergent additives to clean and/
or keep clean intake systems.
■ Recommendation of the use of cleaner burning gasoline
Cleaner burning gasoline, including reformulated gasoline that contains oxy-
genates such as ethanol or MTBE (Methyl Tertiary Butyl Ether) is available in
many areas.
Toy o ta re c om m e nd s th e us e o f cl ea n er b ur n i ng gas o lin e an d ap pr o pr i a te l y
blended reformulated gasoline. These types of gasoline provide excellent
vehicle performance, reduce vehicle emissions and improve air quality.
■ Non-recommendation of the use of blended gasoline
● To y ot a all o ws the us e of ox y gen a te bl e nde d ga sol i ne whe r e t h e ox yg e n-
ate content is up to 10% ethanol or 15% MTBE.
● If you use gasohol in your vehicle, be sure that it has an octane rating no
lower than 87.
● To y ota d oes n ot r eco m m en d the use o f g a sol i n e c o ntain i n g m e tha nol .
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