When the weather gets warmer, the MPG goes higher. For me personally I got a personal best tank going 40.8 MPG according to Fuelly. The RAV itself was saying it was 41.9, but its a bit off. Either way, when the temps are warm, you will see some great mileage but it depends on driving style. As I see more RAV4 Hybrids on the road, I always wonder what those people flying in the left lane get.Maybe there is a fuel leak somewhere?