Which type of peanuts are primarily used for oil extraction?

Runner peanuts are primarily used for oil extraction due to their high oil content and uniformity in size, which makes them particularly suitable for industrial processing. This variety has become the dominant type used in the peanut oil industry, largely because of its good yield and favorable cooking properties. The oil extracted from runner peanuts is widely used in various culinary applications as well as in the production of peanut butter and other products.

While other varieties of peanuts may also be processed for oil, runner peanuts are specifically bred and cultivated to maximize oil production, making them the preferred choice in the market. The other types of peanuts, such as Spanish, Virginia, and Valencia, tend to be utilized for different purposes, including snack and confectionery production, rather than primarily for oil extraction. This specialization in the runner variety is what differentiates it as the primary source for peanut oil.