So a year and a half ago I bought some Motorcraft 10-30 for my Grand Prix. I sold the vehicle, so I didn't need it. I moved to japan, and my parents changed cars. I come back to visit, and they tell me the oil is taking up space. Both of their cars use 5-30, so I have 9 qts. that are of no use to me. So, with reciept in hand, I head to Wal-mart to return it. I hand the lady the reciept that says $1.00 9 times. She says the reciept is no good after 90 days, and then rings up the oil and give me $2.07 a qt. for 1.5 year old SL oil I paid $1 for. All I wanted was my $9 bux back.