Cut your pork shoulder into large pieces.
Make dry rub and rub it into all sides of the meat.
Set "Saut�" on your Instant Pot and add 2 tablespoons of oil, add meat and brown all sides. Once all pork has been browned, remove from the Instant Pot.
Mix 1 1/2 cup of water with 1/2 bottle of Sweet Baby Ray's BBQ sauce, add mixture to Instant Pot and using a wooden spoon, deglaze bottom of pot.
Add pork back into Instant Pot, lock lid and set venting to "Sealing". Select the "Pressure Cook" setting and set to 60 minutes.
After 60 minutes of pressure cooking, carefully release pressure to "Venting".
Use forks or tongs to pull apart all pork.