I am sure most of you have seen my trailer ( was yellow but now white ) BRP 622 it is not. It is a cargo 28cubic foot, with torson suspension, with a 4 gal gas tank in the cooler rack.. It has followed me many thousand's of miles at speeds that are in excess of some speed limits, and I have pulled it in pouring down rain at highway speeds. Yep... it works great and Yep it can have a 4 to 10 mpg effect depending upon your speed and road/wind conditions. Well hills and mountain roads also.