Mine is 38-special, or just 38... Was the number of the 1st truck I drove PL5-38. And it was a special truck they gave to the new guys. It wouldn't get out of it's own way. I think it would pull a 42' step and 2 chicken hauling forklifts 55mph downhill, but only if you had a tailwind. And it used about a gallon of oil a day...yea I said a day. Thank god it was a local out and back truck. Only a few of us at that company ran CB's and one of the other drivers didn't know what to call me, so he just picked 38-special and it stuck. Much like the other chicken stuff when hauling live chickens.