You must only use unleaded gasoline.
Select octane rating 87 (Research Octane Number 91) or higher.
Use of unleaded gasoline with an octane rating lower than 87 may result in engine knocking. Persistent knocking can lead to engine damage.
At minimum, the gasoline you use should meet the specifications of ASTM D4814 in the U.S.A.
■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 Toyota dealer.
■Recommendation of the use of gasoline containing detergent additives
■Recommendation of the use of low emissions gasoline Gasolines containing oxygenates such as ethers and ethanol, as well as reformulated gasolines, are available in some cities. These fuels are typically acceptable for use, providing they meet other fuel requirements.
Toyota recommends these fuels, since the formulations allow for reduced vehicle emissions.
■Non-recommendation of the use of blended gasoline
DO NOT use any flex-fuel or gasoline that could contain more than 15% ethanol, including from any pump labeled E30, E50, E85 (which are only some examples of fuel containing more than 15% ethanol).

■Non-recommendation of the use of gasoline containing MMT Some gasoline contains an octane enhancing additive called MMT (Methylcyclopentadienyl Manganese Tricarbonyl).
Toyota does not recommend the use of gasoline that contains MMT. If fuel containing MMT is used, your emission control system may be adversely affected.
The malfunction indicator lamp on the instrument cluster may come on. If this happens, contact your Toyota dealer for service.
■If your engine knocks
■Notice on fuel quality
Leaded gasoline can cause damage to your vehicle's three-way catalytic converters causing the emission control system to malfunction.
Other gasohol may cause fuel system damage or vehicle performance problems.
At worst, this will lead to engine damage.
■Fuel-related poor driveability If poor driveability (poor hot starting, vaporization, engine knocking, etc.) is encountered 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.
Maintenance data (fuel, oil level, etc.)
Tire informationToyota CH-R Owners Manual > Engine compartment: Engine oil
With the engine at operating temperature and turned off, check the oil level
on the dipstick.
■ Checking the engine oil
1. Park the vehicle on level ground. After warming up the engine and turning
it off, wait more than 5 minutes for the oil to drain back into the bottom of the
engine.
2. ...
Toyota CH-R Service Manual > Smart Key System(for Entry Function): Operation History List
OPERATION HISTORY LIST
NOTICE:
The cause of a malfunction is stored in the RAM or EEPROM in the certification
ECU (smart key ECU assembly). As the cause of a malfunction stored in the
RAM will be cleared when the cable is disconnected from the negative (-)
battery terminal, do ...