Peterson Fluid Systems oil tanks are hand welded for high quality fitment. They feature aluminum construction for lightweight and are available in standard or custom configurations. The preferred tanks of teams such as Robert Yates Racing, Dale Earnhardt Inc, and Roush Racing. Tank capacity rating is measured in overall system capacity not actual tank capacity. For example, if you run 6 quarts in your system then you should use a 1.5 Gallon tank.