Receive: By mail, a check payable to your oil change service dealer for your next Castrol oil change service for the same product you initially purchased: $7 for Castrol GTX, $10 for Castrol GTX High Mileage, $10 for Castrol SYNTEC Blend, $10 for Castrol Tection Extra, $15 for Castrol SYNTEC and $20 for Castrol EDGE.

http://www.castrol.com/liveassets/bp...rpad_Web_1.pdf