The Dukes of Hazzard: High Octane (1979)

Synopsis
Illegal alcohol is causing problems for the Duke family, but not for the usual reasons in this episode of the popular TV action-comedy series The Dukes of Hazzard. In "High Octane," a pollution control group is sponsoring a contest to create a new source of fuel which can be used to run automobiles, but without using petroleum products, with a 10,000-dollar prize going to the winner. Uncle Jesse (Denver Pyle) thinks he has just the stuff to do the job, but his alternative fuel recipe is pretty much the same as his moonshine, and soon a revenue agent (Carlene Watkins) is hot on his trail. Boss Hogg (Sorrell Booke) is also after Jesse, but his concerns don't really involve protecting the law -- Hogg also wants to enter the contest, and wants to seize as much of Jesse's mixture as he can, convinced the elder Duke is a shoo-in to win. Of course, confusion reigns, and it's up to Bo (John Schneider) and Luke (Tom Wopat) to set things straight. "High Octane" first aired on February 23, 1979. ~ Mark Deming, All Movie Guide