I think it's a 2 - 2.5 quart range acrossed the board for these cars. But I'm going to call the local Lexus dealership to double check. The problem for me with measuring what comes out, is the car is overfilled already, so I would certainly get that excess amount into my measuring containers. What I want to do is pull the plug, let it drain until it stops, and refill with the correct amount from there, to put me back at proper levels. My wife and son are heading back to NC for a week next weekend, so that'll be my time to do these things, as it gets pretty tough to get anything done when the ruler of the house isn't but 10 months old. He has the attention span of a flea at the moment.
What's up Nc ? Yeah, I think it is 2-2.4 qt's also. You have got to be loving the GS ;) Been secretly sleeping in the garage lately ?