NoRyceGS4

i guess i am among the suicidal drivers cause i only get 14mpg city

koreanpers

14??? thats almost as bad as my friends Range Rover

lv2000

i filed up drove 38 miles then to see how gas was i topped off for $5.02 @ 1.99 per gallon thats ( i dont know but not 20 mpg ) its ok its way faster than my gs3 !

jbbnet

Here's some stat's for you analytical people with a GS400. I drive mostly highway 70-100 MPH.

gallons miles MPG MPG with taller tires (3.5%)
17.01 350 20.58 21.30
15.35 270.6 17.63 18.25
17.193 356.1 20.71 21.44
16.698 315.4 18.89 19.55
16.098 337.6 20.97 21.71
16.691 315.5 18.90 19.56
15.804 316.5 20.03 20.73

I can confirm you do get better milage with higher octane. The 18.25 MPG used regular (used 87 octane because i picked the wrong button). I'm going to test with 94 octane to see if it matters over the 93 octane premium.

This mileage is really good for a 3700lbs V8! You can't find many other V8's with 300HP getting numbers near 20MPG. I would love to see what the hybrid RX330 will do. It's supposed to be a hybrid V6 with V8 power and 4 cyl gas mileage.