My wife and I travel all over the country with our collection of wild animals presenting educational programs, visiting schools, nature centers and other groups and organazations. Recently we traveled to Washington D.C. showing intercity children the wonders of the natural world. We always use Lucas oil additive in our truck and we believe it is responsiable for our engines performance. Our truck has 311,123 miles on the engine and it is still going strong. Thank you, Larry Battson, Wildlife Educational Services Inc.