Hello,

I am new to this forum, i bought Gs 450h year 2007
I am facing problem with Fuel Economy now .( average 18MPG)
what is best economy for this car.?

 

Fuel economy a lot of things matter.
Have you replaced the air filter, spark plugs, Throttle body cleaning, maf sensor cleaning. These are small things you can easily do, but the most important things are the tire psi I like to run 38psi rear and 36psi front. 2nd most important and the most significant is your driving style, if you like to take off fast, or like to drive over 75mph or 120kmh your going to burn more fuel. The more calmer and slower you drive the more fuel you will save and the difference is huge.

 

Oh dear… on my -06 I am between 25 and 32 mpg.. (That is in European numbers: 9.5 liters per 100 km (wintertime and city driving) to 7.35 l per 100km (long distance driving in the summer).). I do service my car with the Lexus dealership every year, as that is all it needs. Also good tires, and preferably a notch too high pressure.

 

I get the same if not worse economy on my 07 GS350, I don't think there's much else you can do other than the maintenance that others suggested. Also search up what the economy for that model is supposed to be and compare.

 

If you want to save money on fuel, then just drive like a granny. My 08 GS350 awd gets really good gas mileage

 

I have the AWD as well, whats your exact mileage? I get about 13L/100km driving fairly conservatively.