What do you guys think about mixing 1 quart of 10w30 full synthetic mobil 1 with 4 quarts of 10w30 super tech dino for creating a synthetic blend? I have been running supertech semi synthetic 10w30 in my ford aerostar for a while, it has been running great. Recently walmart increased the price of the st semi synthetic from $1.63 to $1.74 per quart, so i'm not going to run it anymore. Will it be ok to mix the mobil 1 with the st dino?