Hello,

I have a kia optima model :2000. This car consumes alot of fuel even without ac, although it is a v6 the consumption rate is abnormal. Mechanics have been telling all sort of things to change which I have. Any suggestions please.

What are your parameters that makes you to conclude that the car is consuming fuel?

If your assertion is right, kindly answer the below questions:
1. Has the fan been run direct?
2. Is the thermostat remove?
3. Is the CEL light ON?

If Q1 and Q2 is Yes then that is the beginning of your fuel consumption.

For Q3 you need to run a scan to further probe into the actual cause of your claim.

You do not just conclude a car is consuming fuel without figures to prove it. A typical Nigerian will tell you how many tanks of fuel he uses in a week but not many miles or kilometers covered with a specific amount of fuel in litres. I have overheard a colleague complaining that her Hyundai accent goes thru a tank of fuel every week while her neighbor's honda accord goes for a week and fuel between refuel. She didn't factor in the fact that her Hyundai can only take 35-40 litres while the accord can gulp up to 80 litres. She didnt take into consideration her endless idling in traffic with her AC on. When i asked her how many kilometers she drives per week, she threw her hands up in the air and asked me why she should know such a thing. lol.
Please fill up your car with a specific amount of fuel, take note of ur mileage. Drive till you get to where the fuel mark was before u filled up. Subtract your previous mileage from ur current mileage. Divide your answer with the amount of fuel you bought earlier and post the figures here. Don't forget to tell us ur car make, model, engine size and year of production. From there, we will be better able to help you. Is your check engine light up by any chance?
Quit giving the mechanics daily bread until we establish some facts. Cheers