Hello gentlemen! I just purchased a new Harbor Freight 9500W invertor generator to power the whole house in an outage. It requires a 30 hour break in process. What oil would you recommend for this break in process and then what oil would be a good choice there after? It say to use a 10w30 weight oil. I'm in Colorado and the winters can be very cold so I was thinking synthetic a 0wXX weight? I normally use Castrol GTX for vehicles not on synthetic and Mobil 1 0w20 for my Honda and 0w40 for my Volvo so I have those on hand at all times. I'll probably need a different a different weight then those. Any recommendations for this generator?