According to the oil recommendation for my Kohler 7000 Series in my Ariens 46" lawn rider, I should use a 10w30 oil. Since it's used only in the summer, can I use 5w30 motor oil in it? Reason being is that I have 6 jugs of Maxlife full synthetic 5w30 oil that I can use. Don't really want to buy any more oil unless absolutely necessary.