Ok so last week I changed the oil in my old Toro 1132 snowblower. 11 HP B&S motor I change it out every year with whatever brand 5w30 and it runs great. This time I used whatever was on hand in 30 wt oil. Amsoil 0w30, PYB, 5w30, Motorcraft 5w30 and Shell full synthetic 5w30 I had a little of each so I mixed. The problem is now I can't sleep at night thinking my old B&S Toro is going to blow up the first snowstorm we have! So should I drain it out and stick with one oil or is this frankenbrew ok to run?