Hello. I'm a new (?) driver- 9 months now :) I have a 2000 RX300 for my first car and I really don't know much about it except that it's used, bought a dealership. My concern is that I feel I'm not driving the car properly- as a new driver, at 60KM/h I don't know what a normal rpm would look like for example. I just learned recently about "O/D", I drive mainly around the city/Toronto, and my O/Dis always on( light is off, right?). Lately I noticed, I've been gassing a LOT more frequently. On the dashboard it says 24 mpg ( not entirely sure what that means. Sometimes when I'm low on gas- but before the "get gas now" light comes on- the car won't go for eventhough I'm stepping on the gas, then it's just shoot up a bit. It doesn't happen often, but it happens. Also, when I turn on the A/C, I feel the car becomes slightly heavy to drive. I got the car just this December 2011.