AU residents 18+ only. Between 12.01am (AEST) 1/9/20 & 11.59pm (AEDT) 30/11/20, buy 2x20L in 1 transaction or 1x205L RX Super 15W-40 CJ-4/E9 or Vecton 15W-40 CK-4/E9 from participating Australian Castrol Distributor/Reseller, visit engineoils.winwithcastrol.com.au & fill out entry form as relevant to your purchase product incl. receipt upload to see if you provisionally win instant prize. Max 1 entry per transaction, max 4 entries per person per day & per receipt. Keep original itemised receipt/s. 300x20L prizes: $50 BP gift card. 75x205L prizes: $200 BP gift card. Total prize pool up to $30k. See website within 2 business days of entry for winner/s. Entrants will get future marketing from Promoter. See website for list of participating stores, full conditions inc. privacy statement. Promoter: Castrol Australia Pty Ltd, ABN 87 008 459 407, 17/717 Bourke St, Docklands 3008. Permits: ACT TP 20/00855, SA T20/750, NSW LTPS/20/44300.