You might want to check out www.mpgstickers.com. They have one that simply says "Hybrid". I bought one and put it on the back of the car right above the the model number. It turns quite a few heads. The marketing literature for the 400h downplays the efficiency and stresses the performance, but that's why we bought it, otherwise we'd never buy such a big earth destroyer. I also got one for my Prius just to annoy people. I typically get 47mpg, but got 52 on my last tank. Our 400h gets about 29mpg.
