The use of the word "salad" in association with any oil name has very little meaning. It means the marketing department thinks you will be delighted to use their oil to help dress a salad.

It doesn't tell you anything about the oil's suitability for frying. For that, you need to know that you have a high-temperature oil, that is, an oil with a high "smoke point." Quite likely you'll be frying at a temperature of 375°F (190°C). You might initially heat the oil 15° higher, so that it doesn't fall much below 375° when you add the food to the fryer. As oil ages, and especially if it has been used before, it's smoke point irreversibly drops. So if you start out with a high-temperature oil and treat it well, you might be able to use it a few times.

The label will tell you what oil is actually in your bottle – if it's "vegetable" oil, most likely you have soybean oil, which has a smoke point around 450°F (233°C). Canola oil, peanut oil, corn oil, safflower oil, and light olive oil all have similarly high smoke points, so if your vegetable salad oil is any of those oils, they will work fine in your deep fryer.

Peanut oil is highly regarded for deep frying, although more people swear by corn oil, which adds a little extra flavor.