Kia Optima: Use of MTBE - Fuel requirements - Introduction - Kia Optima TF 2011-2024 Owners ManualKia Optima: Use of MTBE

Kia recommends avoiding fuels containing MTBE (Methyl Tertiary Butyl Ether) over 15.0% vol. (Oxygen Content 2.7% weight) in your vehicle.

Fuel containing MTBE over 15.0% vol. (Oxygen Content 2.7% weight) may reduce vehicle performance and produce vapor lock or hard starting.

Your New Vehicle Limited Warranty may not cover damage to the fuel system and CAUTION

Your New Vehicle Limited Warranty may not cover damage to the fuel system and any performance problems that are caused by the use of fuels containing methanol or fuels containing MTBE (Methyl Tertiary Butyl Ether) over 15.0% vol. (Oxygen Content 2.7% weight.)

Gasoline containing alcohol and methanol
Gasohol, a mixture of gasoline and ethanol (also known as grain alcohol), and gasoline or gasohol containing methanol (also known as wood alcohol) are being marketed along with or instead of leade ...

Do not use methanol
Fuels containing methanol (wood alcohol) should not be used in your vehicle. This type of fuel can reduce vehicle performance and damage components of the fuel system. ...

See also:

Installation
Installation is in the reverse order of removal. Perform the following : Х Adjust a shift cable. Х Refill engine with engine oil. Х Refill a transaxle with ...

Variable Intermittent Wipers
Set the lever to the INT position and choose the desired wiper interval by turning the ring. ...

Inspection
Brake Booster 1. Inspect the check valve in the vacuum hose, intensifier and the connecting section. ...

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