From the list of ingredients and the preparation steps, there are advantages and disadvantages of using a brush and a spray bottle to brush oil on the barbecue.

1. In terms of the list of ingredients, when using a brush, you need to prepare cooking oil and a brush for brushing oil in advance. For the oil sprayer, you only need to prepare cooking oil.

2. Preparation steps: When using the brush, you need to brush a layer of oil evenly on the surface of the ingredients, which requires a certain degree of skill and proficiency. When using an oil sprayer, you only need to spray cooking oil on the surface of the ingredients, which can also achieve the effect of even oiling, and is relatively more convenient.

In summary, in terms of both the list of ingredients and the preparation steps, using an oil sprayer is more convenient when making barbecue, while using a brush requires more ingredients to be prepared. However, using a brush allows for better control over the amount of oil and achieves a more even application. Which one to choose can be determined by personal preference and actual needs.