Do you intend to do 10k intervals? If so, you can use any synth that suits your climate.
If you want to do 5-6k, you can use dino oil. Just leave the filter in place and drain the oil.
For summer, if you take dealer 5w-40 (which is what they use in bulk), you can just swap out the oil for winter with a 5w-30, or 10w-30 depending on climate.