Fuel Information - Lexus RC350 Owner's Manual

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9-1. Specifications

Fuel information

You must only use unleaded gasoline.
Select premium unleaded gasoline with an octane rating of 91 (Research
Octane Number 96) or higher required for optimum engine performance
and fuel economy.
If the octane rating is less than 91, damage to the engine may occur and may
void the vehicle warranty.
At minimum, the gasoline you use should meet the specifications of ASTM
D4814 in the U.S.A..
Gasoline quality
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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
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Automotive manufacturers in the U.S.A., Europe and Japan have developed a specifi-
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cation 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 emission levels. In
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the U.S., category 4 has been adopted.
The WWFC improves air quality by lowering emissions in vehicle fleets, and improves
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customer satisfaction through better performance.