However, if it's exceptionally stuck, it's possible the bolt is seized or damaged. Before you force it, try using penetrating oil (like PB Blaster) and letting it soak in for a while. This can help break the rust and corrosion that's likely binding the bolt. Then try again with a wrench that properly fits the bolt head. If it still won't budge, you may need to use a different tool or seek professional help to avoid damaging the oil pan.