Gauge is typically a given numerical value in the product description. It describes how thick the wire is inside the cable. In fact, it’s a good indicator of the quality of the product. To put it another way, a low gauge number gives you a thicker wire. So, if you want to jump-start a truck, you need a four gauge wire. To jump-start car supplies, you’ll need a 6-8 gauge cable. Therefore, we can conclude that gauges with a value of 8 are ideal for regular passenger cars.