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I have always used regular unleaded in my 2001 Optima SE V6. At about 94,000 miles it developed a little bit of a knock upon brisk acceleration... the kind of a knock that makes you think you should use premium fuel. Instead of paying more for gas, I checked the spark plugs. Sure enough, the platinum plugs were quite worn. They were the originals, and all three of the back (firewall side) were bad. After a new set of plugs the knock went away, and I continue to use only regular unleaded fuel. FYI: This vehicle does not use a knock sensor. Premium fuel is not reccomended. S. McDonald
What else can I help you with?
How many valves does the 2001 Kia Optima have?
The 2001 Kia Optima has 16 valves.
What size engine does the 2001 Kia Optima have?
The 2001 Kia Optima has an inline 4 engine.
Is the 2001 Kia Optima electric or gas?
The 2001 Kia Optima is a gas-powered vehicle.
What kind of transmission does the 2001 Kia Optima have?
The 2001 Kia Optima has a 5-speed manual.
What kind of fuel does the 2001 Kia Optima use?
The 2001 Kia Optima runs on regular unleaded.
How tall is the 2001 Kia Optima?
The height of the 2001 Kia Optima is 4 ft. 7.5 in. (55.5 in.).
What is the cam type of the 2001 Kia Optima?
The 2001 Kia Optima has double overhead cam (DOHC).
How long is the 2001 Kia Optima?
The 2001 Kia Optima is 15 ft. 5.9 in. (185.9 in.) long.
What is the front leg room in the 2001 Kia Optima?
The 2001 Kia Optima has 43.3 in. of front leg room.
What is the front head room in the 2001 Kia Optima?
The 2001 Kia Optima has 39 in. of front head room.
What is the rear leg room of the 2001 Kia Optima?
The 2001 Kia Optima has 36.2 in. of rear leg room.
What is the rear shoulder room of the 2001 Kia Optima?
The 2001 Kia Optima has 55.7 in. of rear shoulder room.
