What kind of oil do you normally use in your car. I know a lot of newer cars are recommending synthetic oils because the are shown to have a longer life than conventional oils. I personally use regular old Valvoline oil for my vehicles. I don't have anything brand new so the good old stuff has worked just fine for me in the past. I was once thinking of using a lend but the salesman told me that there really aren't any standards for blended oils yet. So one blend might be 50/50 and another might be 90/10. So you really don't know what you are getting with the blends.