So, what oil should you use if you want to substitute it for shortening? Cooking oils like coconut oil or avocado oil have high smoke points, making them great options. But olive oil and other flavorful oils might not be the best choice, as they can add strong flavors and lower smoke points to the mix.
Replace Shortening With Vegetable Oil at Fernando Smith blog
In some recipes, like 炸 foods or roasted vegetables, you can get away with using oil instead of shortening. But when it comes to baked goods, it's a whole different story. You'll need to adjust the ratio of liquid to fat and possibly add some extra leavening agents to get the desired texture.