Are there any additives you have found particularly efficacious? I’m talking fuel additives, oil additives, and the like. In your experience is McMurphy’s Snake Oil Diesel Treatment a must-use? How about SynTexCo’s Patent Oil Softener? I figure most of those jugs of additives you see are hokum but am sincerely interested if in your experience any of them actually work or demonstrate reliable benefits. Thanks, amigos.

