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6-1. Specifications
■ Gasoline quality
In very few cases, driveability problems may be caused by the brand of gasoline you
are using. If driveability problems persist, try changing the brand of gasoline. If this
does not correct the problem, consult your Lexus dealer.
■ Gasoline quality standards
● Automotive manufacturers in the US, Europe and Japan have developed a
specification for fuel quality called World-Wide Fuel Charter (WWFC) that is
expected to be applied worldwide.
● The WWFC consists of four categories that are based on required emission
levels. In the US, category 4 has been adopted.
● The WWFC improves air quality by lowering emissions in vehicle fleets, and
customer satisfaction through better performance.
■ Lexus recommends the use of gasoline containing detergent additives
● Lexus recommends the use of gasoline that contains detergent additives to
avoid build-up of engine deposits.
● All gasoline sold in the U.S.A. contains minimum detergent additives to clean
and/or keep clean intake systems, per EPA’s lowest additives concentration pro-
gram.
● Lexus strongly recommends the use of Top Tier Detergent Gasoline. For more
information on Top Tier Detergent Gasoline and a list of marketers, please go to
the official website www.toptiergas.com.
■ Lexus recommends the use of cleaner burning gasoline
Cleaner burning gasoline, including reformulated gasoline that contains oxygen-
ates such as ethanol or MTBE (Methyl Tertiary Butyl Ether) is available in many
areas.
Lexus recommends the use of cleaner burning gasoline and appropriately blended
reformulated gasoline. These types of gasoline provide excellent vehicle perfor-
mance, reduce vehicle emissions and improve air quality.
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