Bought this a couple years ago with 150k miles. Thanks to a balmy 60 degree Indiana day today, I decided to tackle a leaky front valve cover gasket. Really happy with what I uncovered. No idea the prior owners maintenance schedule, but I've been using either Amsoil XL 5w20 or Phillips 66 Shield Choice 10w30. Average OCI since I've had it is around 7500 miles.