Joe 
2006 Toyota Avalon Sedan Limited 4dr Sedan (3.5L 6cyl 5A)
Loss of engine oil 
 Same thing happened to my Avalon . No light no warning. Dealer said just made it in before the engine went. Happened to our friend with the same car. Do not understand why Toyota has not done a recall if this is happening with a lot of Avalon's. Took almost three weeks for parts to come in. But the gave us a loner car. Love the car this is our first Avalon and will not be our last.