I tried to save my son a few dollars by using my 15 cent coupon in his car and mine. The employee was spying on me and cut me off after I put 45 l into my son's car, leaving my truck, that would have taken 75 l, empty. The employee had no PR skills at all so, I left to give my business to Superstore/Mobil. User's recommendation: Give warnings and a replacement gas coupon.