Yep, I've often had driveways with a slight incline and unfortunately it does mean that whatever is left in the tank can't get into the fuel lines so said car won't start. My 2005 Mazda has been known to do it too.

One trick I did discover if your driveway is long enough or has a flat bit at the bottom is to let the handbrake off and allow the car to roll slightly down the incline then try to start it when it's a bit more level. Usually it will start and have enough fuel in the tank to let you limp to a local servo.

But it is a lot easier to not push our luck and just fill up when it needs it - even if it's just $10 till prices come down.