Like many of us BITOG'ers, I am OCD about maintenance on my vehicle's and like to use the best fluids available. My daughter bought herself a 2012 Elantra last summer and i have more than graciously been performing oil changes on it. Yesterday she took her car back to the dealership to have the rear windshield wiper replaced and she walked out $60 poorer. They told her she needed to have the oil changed. I have yet to look at the bill but no doubt it will be dealer bulk oil and a Hyundai oil filter. I had a shiny new jug of QSUD 5w20 waiting here along with a PureONE filter. I won't be able to sleep for the next 4 months. Any advice would greatly be appreciated.