How do I use this Riddle Oil coupon code at checkout?
This Riddle Oil promotion ("$10 off Sample Kit + $10 back on full-size bottle with Riddleoil email & text sign up for new customers") is an instant deal that does not require entering a promo code. Simply click the "Shop" button on this page to visit Riddle Oil, add eligible items to your cart, and the discount will be applied automatically at checkout.