2018 LEXUS RX450h octane

712 9-1. Specifications
RX450h_RX450hL _U_OM48F85U■
Engine number
The engine number is stamped on
the engine block as shown.

Front 
RearEngine Model 3.5 L 6-cylinder (2GR-FXS)
Type 6-cylinder V type, 4-cycle, gasoline
Bore and stroke 3.70 × 3.27 in. (94.0 × 83.0 mm)
Displacement 210.9 cu. in. (3456 cm 3
)
Valve clearance (engine cold) Automatic adjustment
Fuel Fuel type Unleaded gasoline only
Octane Rating 91 (Research Octane Number 96) or higher
Fuel tank capacity (Reference) 17.2 gal. (65 L, 14.3 Imp. gal.)
Electric motor (traction motor) Type Permanent magnet synchronous motor
Maximum output 123 kW
Maximum torque 247 ft•lbf (335 N•m, 34.2 kgf•m)
Type Permanent magnet synchronous motor
Maximum output 50 kW
Maximum torque 103 ft•lbf (139 N•m, 14.2 kgf•m)

720 9-1. Specifications
RX450h_RX450hL _U_OM48F85U■
Gasoline quality
In very few cases, driveabilit y problems may be caused by th e brand of gasoline you are
using. If driveability problems persist, try ch anging the brand of gasoline. If this does not
correct the problem, consult your Lexus dealer. ■
Gasoline quality standards ●
Automotive manufacturers in the U.S.A., Europe and Japan have developed a specifi-
cation for fuel quality calle d the World-Wide Fuel Charte r (WWFC), which is expected
to be applied worldwide. ●
The WWFC improves air quality by lowering emissions in vehicle fleets, and improves
customer satisfaction th rough better performance.■
Recommendation of the use of gasoline containing detergent additives ●
Lexus recommends the use of gasoline that contains detergent additives to avoid the
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 program.●
Lexus strongly recommends the use of Top Tier Detergent Gasoline. For more informa-
tion on Top Tier Detergent Gasoline and a lis t of marketers, please go to the official
website www.toptiergas.com.Fuel information You must only use unleaded gasoline.
Select premium unleaded gasoline with an octane rating of 91 (Research
Octane Number 96) or higher requir ed 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.

7219-1. Specifications
9
Vehicle specifications
RX450h_RX450hL _U_OM48F85U■
Recommendation of the use of low emissions gasoline
Gasolines containing oxygenates such as et hers and ethanol, as well as reformulated
gasolines, are available in some cities. Thes e fuels are typically acceptable for use, pro-
viding they meet other fuel requirements.
Lexus recommends these fuels, since the form ulations allow for reduced vehicle emis-
sions. ■
Non-recommendation of the use of blended gasoline
●
If you use gasohol in your vehicle, be sure that it has an octane ra ting no lower than 91.●
Lexus does not recommend the use of gasoline containing methanol. ■
Non-recommendation of the use of gasoline containing MMT
Some gasoline contains an octane enhancing additive called MMT
(Methylcyclopentadienyl Manganese Tricarbonyl).
Lexus does not recommend the use of gasoline that contains MMT. If fuel containing
MMT is used, your emission control system may be ad versely affected.
The malfunction indicator lamp on the instru ment cluster may come on. If this happens,
contact your Lexus dealer for service. ■
If your engine knocks ●
Consult your Lexus dealer. ●
You may occasionally notice light knocking for a short time while accelerating or driv-
ing uphill. This is normal and there is no need for concern.●
Use only gasoline containing up to 15% etha-
nol.
DO NOT use any flex-fuel or gasoline that
could contain more than 15% ethanol, includ-
ing from any pump labeled E30, E50, E85
(which are only some examples of fuel con-
taining more than 15% ethanol). DO NOT use gasoline
containing more than
15% ethanol.
(30% ethanol)
(50% ethanol)
(85% ethanol)

722 9-1. Specifications
RX450h_RX450hL _U_OM48F85UNOTICE ■
Notice on fuel quality ●
Do not use improper fuels. If improper fuels are used, the engine will be damaged. ●
Do not use leaded gasoline.
Leaded gasoline can cause damage to your vehicle’s three-way catalytic converters
causing the emission control system to malfunction. ●
Do not use gasohol other than the type previously stated.
Other gasohol may cause fuel system damage or vehicle performance problems. ●
Using unleaded gasoline with an octane numb er or rating lower than the level previ-
ously stated may cause pe rsistent heavy knocking.
At worst, this may lead to engine da mage and will void the vehicle warranty.■
Fuel-related poor driveability
If poor driveability (poor hot starting, vaporization, engine knocking, etc.) is encoun-
tered after using a different type of fuel, discontinue the use of that type of fuel.■
When refueling with gasohol
Take care not to spill gasohol. It can damage your vehicle’s paint.