A Small Butt like that...Figure 1.5 hours per pound at 225°F , to get to an Internal Temp of 205°F and probe tender. If you want to Wrap, I prefer a Foil Pan covered to actually rolling in foil. You will save a little time cooking, do so when the IT gets to 160-165.
Done early? Foil and Towel wrap then Cooler rest up to 4 hours...JJ
This is what I will add to the covered pan...
POP Sauce
2C Cola or other Favorite
1/2C Apple Cider Vinegar
2T Rub, whatever's on the meat.
1T Mustard
1T Molasses
1T Colgin Hickory Liquid Smoke (Optional. Use if Oven Roasting)
Add all to a pot and bring to a simmer, for 5 minutes.
For Foiling, add to a pan with the pork, cover and continue cooking.
For Finishing Sauce, keep warm and add to meat.
For Marinade, cool for 30 minutes the refrigerate until cold.
Marinate meat overnight.
For Glaze, reduce over low heat until syrupy. Brush over grilling meat and caramelize.
Enough for one average butt.