Seems to run great but has terrible gas milage.
Any suggestions?

 

Welcome to Club Lexus!

Take a look at this sticky thread: https://www.clublexus.com/forums/rx-...out-yours.html

 

What is your definition of terrible? Anything above 20 MPG can be considered acceptable.

 

I would say if you get 17 or less, it would be a matter of concern. It varies quite a bit based on traffic, hills and driving style.

Salim

 

Welcome to the Club.

It is going to depend largely on how you drive it, would be interested to know what mpg you are getting.

 

I get average 15 in city and best is 18.5 to 19 on highway doing speed limit with cruise control.
I am a light on the pedal driver

 

Went to pa using cruise all the way staying within 5 mph of speed limit averaged 18.5 mpg at best

 

I dont get above 19 on highway and I am not heavy on the gas

 

I Drive like an old lady

 

My new-to-me 2002 RX300 AWD w/88k was averaging 18 mpg, but improved 2 mpg when I had the throttle body cleaned. To be clear I was having trouble with the accelerator pedal sticking, and that is why they suggested cleaning the throttle body. It fixed that issue and has also resulted in a slight improvement in gas mileage. There is a DIY thread that explains the process on CL.