25% off at Repco this weekend for auto enthusiast. Must have some form of service from RAC or the like. Only for full price items, and excludes batteries, gift cards, GPS, and trade purchases.
From my experience I've generally found Repco to be about 10% more expensive than Supercheap, but if you were going away for Christmas then this would be a good time to get anything you needed to tune up the car.
Also note if you have a kid aged 16-17, or you are a kid aged 16-17, then you can get roadside assist for free in most states, and a card that would allow you to take part in this sale. It's highly unlikely that you will get the card in time for this sale, but it will at least prepare you for the next time.
https://www.google.com.au/search?q=free2go